-------------
      name:  <unnamed>
       log:  C:\D\projekte\Replication McCabe_Snyder\McCabe_Snyder_ReStat_Table_3.smcl
  log type:  smcl
 opened on:  24 Mar 2017, 09:02:13

.
. **********************************************************************
. *
. * Program McCabe_Snyder_ReStat_Table_3.DO
. *
. * Runs regressions behind Table 3 involving alternative specifications
. * for aggregage digitization results.
. *
. * McCabe & Snyder August 2013
. *
. **********************************************************************
.
. ************************************;
. *** Set initial Stata parameters ***;
. ************************************;
.
. version 12

. set memory 900m
set memory ignored.


Memory no longer
needs to be set in modern Statas;
memory adjustments are performed on the fly
automatically.


. set matsize 4000

. set more 1

. #delimit ;
delimiter now ;
. *****************;
. *** Load data ***;
. *****************;
. use McCabe_Snyder_ReStat_combined;

. gen cit = cusa + ceng + ceur + coth + cmis;

. summ;

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
     journal |     60,453    75.22565    53.00826          4        229
       pyear |     60,453    1979.671    11.73278       1956       2005
       cyear |     60,453    1994.847    7.148305       1980       2005
cusa_sing_~h |     60,453    10.90015    18.42545          0        225
ceng_sing_~h |     60,453    3.618811    6.116916          0        114
-------------+---------------------------------------------------------
ceur_sing_~h |     60,453    2.985526    5.854751          0         95
coth_sing_~h |     60,453    1.129423    2.525747          0         49
        issn |          0
    fpubdate |     60,453    1947.552    26.46888       1844       1988
        own1 |     60,453    .0065671    .0807717          0          1
-------------+---------------------------------------------------------
      jstor1 |     60,453    .0248623    .1557066          0          1
    ingenta1 |     60,453    .0052934    .0725633          0          1
   proquest1 |     60,453    .0194035    .1379396          0          1
      ebsco1 |     60,453    .0434222    .2038072          0          1
       gale1 |     60,453    .0073445    .0853858          0          1
-------------+---------------------------------------------------------
       oclc1 |     60,453    .0038212    .0616977          0          1
        own2 |     60,453     .019999    .1399978          0          1
      jstor2 |     60,453    .1180587    .3226802          0          1
    ingenta2 |     60,453    .0054092    .0733484          0          1
   proquest2 |     60,453    .0802938    .2717497          0          1
-------------+---------------------------------------------------------
      ebsco2 |     60,453    .0824773    .2750928          0          1
       gale2 |     60,453    .0361769    .1867316          0          1
       oclc2 |     60,453    .0172034    .1300299          0          1
        cusa |     60,453    21.27597    36.34841          0        404
        ceng |     60,453     6.23974    10.71303          0        180
-------------+---------------------------------------------------------
        ceur |     60,453    5.529817    11.20683          0        201
        coth |     60,453    2.125866    4.679829          0        100
        cmis |     60,453    .5693679    1.273637          0         22
       digz1 |     60,453    .0002481    .0157502          0          1
       digz2 |     60,453    .0001654    .0128605          0          1
-------------+---------------------------------------------------------
   elsevier1 |     60,453    .0126545    .1117789          0          1
   elsevier2 |     60,453    .0461516     .209815          0          1
  blackwell1 |     60,453    .0029279    .0540312          0          1
  blackwell2 |     60,453    .0078573    .0882935          0          1
     ingaoc1 |     60,453    .0111492    .1050002          0          1
-------------+---------------------------------------------------------
     ingaoc2 |     60,453     .051263    .2205354          0          1
    jss2_usa |     60,453    .6965416    2.252154          0      10.96
    jss2_eng |     60,453    .1013045     .335692          0       1.76
    jss2_eur |     60,453    .1321814    .4711944          0       2.77
    jss2_oth |     60,453    .1499141    .5599059          0       3.49
-------------+---------------------------------------------------------
        jss2 |     60,453    1.079942    3.556491          0      18.98
     es2_usa |     60,453    .0110188    .0779576          0       1.15
     es2_eng |     60,453    .0184732    .1299557          0       1.87
     es2_eur |     60,453    .0092533    .0647896          0         .9
     es2_oth |     60,453    .0108962    .0780014          0       1.15
-------------+---------------------------------------------------------
         es2 |     60,453    .0496415    .3498687          0       5.07
      cit_20 |     53,437    2.984674    5.791662          0        103
   cit_20_40 |     53,437    3.355802    7.523935          0        342
   cit_40_60 |     53,437    4.079439    8.433056          0        133
   cit_60_80 |     53,437    6.533713    13.20245          0        158
-------------+---------------------------------------------------------
      cit_80 |     53,437    20.89648    36.55057          0        562
quintile_m~e |     60,453    2.767886    .6405921          1          3
 fraction_80 |     53,840    .1442456     .112933   .0033223   .8333333
   cit_total |     60,453    35.74076      59.352          0        771
   obs_count |     60,453    76.10696    65.71754          6        706
-------------+---------------------------------------------------------
  count_null |     53,840    64.92593    65.79545          0        693
count_obs_80 |     53,840    8.360141    7.462537          1         67
         cit |     60,453    35.74076      59.352          0        771

. sort journal pyear cyear;

. by journal pyear:  gen cit_lag = cit[_n-1];
(3,558 missing values generated)

. ***************************************************************;
. *** Create cyear variables and journal volume fixed effects ***;
. ***************************************************************;
. forvalues num = 1956/2005 {;
  2.    quietly gen byte py`num' = (pyear == `num');
  3.    };

. forvalues x = 80/99 {;
  2.    quietly gen byte c`x' = (cyear == 1900 + `x');
  3.    };

. forvalues x = 0/4 {;
  2.    quietly gen byte c0`x' = (cyear == 2000 + `x');
  3.    };

. * create journal volume fixed effect groups;
. sort journal pyear;

. egen volume = group(journal pyear);

. **********************************************************************;
. *** Generate other variables                                       ***;
. **********************************************************************;
. * Suffix 1 refers to partial access;
. gen digit1 = ((own1 + elsevier1 + jstor1 + ingaoc1 +  blackwell1 + ebsco1 + proquest1 + digz1) >= 1);

. * Suffix 2 refers to full access;
. gen digit2 = ((own2 + elsevier2 + jstor2 + ingaoc2 +  blackwell2 + ebsco2 + proquest2 + digz2) >= 1);

. replace digit1 = 0 if digit2 == 1;
(2,752 real changes made)

. gen c95_99 = (cyear >= 1995 & cyear <= 1999);

. gen c00_05 = (cyear >= 2000 & cyear <= 2005);

. gen d1c95 = digit1 * c95_99;

. gen d1c00 = digit1 * c00_05;

. gen d2c95 = digit2 * c95_99;

. gen d2c00 = digit2 * c00_05;

. drop c95_99 c00_05;

. gen age = cyear - pyear;

. gen age2 = age^2;

. gen age3 = age^3;

. gen age4 = age^4;

. save temp_data, replace;
(note: file temp_data.dta not found)
file temp_data.dta saved

. **********************************************************************;
. *** 1956-1965                                                      ***;
. **********************************************************************;
. gen plower = 1956;

. gen pupper = 1965;

. keep if pyear >= plower & pyear <= pupper;
(51,509 observations deleted)

. * Create fixed effects for publication x citation year interactions;
. * Drop the 2005 cyear to avoid multicolinearity with the constant;
. * Don't create variables with pyear after cyear;
. * Do create variables with pyear = cyear since keeping age0 = 1 observations;
. forvalues y = 56/99 {;
  2.    forvalues x = 80/99 {;
  3.       quietly gen ip`y'c`x' = py19`y' * c`x' if
>          (`x' >= `y')
>        & (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 56/99 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip`y'c0`x' = py19`y' * c0`x' if
>          (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 0/5 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip0`y'c0`x' = py200`y' * c0`x' if
>          (`x' >= `y')
>        & (2000 + `y' >= plower)
>        & (2000 + `y' <= pupper);
  4.    };
  5. };

. foreach var of varlist ip* {;
  2.    capture assert !missing(`var');
  3.    if _rc {;
  4.       drop `var';
  5.    };
  6. };

. egen title = group(journal);

. rename journal smournal;

. quietly tabulate title, generate(journal);

. drop title;

. foreach var of varlist journal* {;
  2.    quietly gen ia1`var' = age * `var';
  3.    quietly gen ia2`var' = age2 * `var';
  4.    quietly gen ia3`var' = age3 * `var';
  5.    quietly gen ia4`var' = age4 * `var';
  6. };

. rename smournal journal;

. * Avoid multicolinearity by dropping first journal's age profile;
.  drop ia1journal1 ia2journal1 ia3journal1 ia4journal1;

.  * Column 1: No fixed effects or journal age profile;
. poisson cit  ip* d1c* d2c*, irr cluster(journal);

Iteration 0:   log pseudolikelihood = -84028.133
Iteration 1:   log pseudolikelihood = -83964.512
Iteration 2:   log pseudolikelihood =  -83964.37
Iteration 3:   log pseudolikelihood =  -83964.37

Poisson regression                              Number of obs     =      8,944
                                                Wald chi2(37)     =          .
Log pseudolikelihood =  -83964.37               Prob > chi2       =          .

(Std. Err. adjusted for 39 clusters in journal)
-------------+----------------------------------------------------------------
             |               Robust
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip56c80 |    4.897083    2.342301      3.32    0.001      1.917799     12.50466
     ip56c81 |    4.138957    2.047263      2.87    0.004      1.569853     10.91247
     ip56c82 |    4.507775    2.346023      2.89    0.004      1.625412     12.50147
     ip56c83 |    4.507775    2.271573      2.99    0.003      1.678888     12.10327
     ip56c84 |    4.384835    2.116331      3.06    0.002       1.70264     11.29234
     ip56c85 |    4.364346    2.002383      3.21    0.001      1.775758     10.72642
     ip56c86 |    4.569244    2.198867      3.16    0.002      1.779176     11.73464
     ip56c87 |    4.323366    2.016414      3.14    0.002      1.733095     10.78504
     ip56c88 |    4.159447    1.995331      2.97    0.003      1.624446      10.6504
     ip56c89 |    4.425815     2.16145      3.05    0.002      1.699375      11.5265
     ip56c90 |    4.569244    2.245529      3.09    0.002      1.743919     11.97188
     ip56c91 |    4.077487    2.012636      2.85    0.004      1.549679     10.72861
     ip56c92 |    4.528265    2.326575      2.94    0.003       1.65422     12.39568
     ip56c93 |    5.204431    2.722384      3.15    0.002      1.866889     14.50868
     ip56c94 |    4.958552    2.457963      3.23    0.001      1.876777     13.10078
     ip56c95 |    4.835613    2.571042      2.96    0.003        1.7056     13.70964
     ip56c96 |    3.891392    1.615503      3.27    0.001      1.724767     8.779695
     ip56c97 |    3.199421    1.391661      2.67    0.008      1.364023     7.504485
     ip56c98 |    2.421162    1.042901      2.05    0.040      1.040816     5.632143
     ip56c99 |    1.965543    .8754775      1.52    0.129      .8210068     4.705637
     ip57c80 |     3.54475    1.780046      2.52    0.012      1.324777     9.484806
     ip57c81 |    3.257892    1.451062      2.65    0.008      1.360856     7.799398
     ip57c82 |    3.360341    1.453968      2.80    0.005      1.439069     7.846665
     ip57c83 |    3.442301    1.570827      2.71    0.007      1.407407      8.41934
     ip57c84 |    3.483281    1.635434      2.66    0.008      1.387846     8.742501
     ip57c85 |     3.62671    1.722254      2.71    0.007      1.429861     9.198814
     ip57c86 |    3.257892    1.550988      2.48    0.013      1.281458     8.282644
     ip57c87 |    2.971033    1.323387      2.44    0.015      1.240958     7.113087
     ip57c88 |    2.909564    1.483503      2.09    0.036      1.071086     7.903714
     ip57c89 |    2.725155    1.325627      2.06    0.039      1.050345     7.070505
     ip57c90 |    2.971033    1.350286      2.40    0.017      1.219131     7.240433
     ip57c91 |    2.909564    1.539854      2.02    0.044      1.031191     8.209501
     ip57c92 |    3.319361    1.700275      2.34    0.019      1.216309     9.058684
     ip57c93 |    2.909564    1.409248      2.21    0.027      1.126025     7.518091
     ip57c94 |    2.684175     1.39588      1.90    0.058      .9686159     7.438238
     ip57c95 |    3.421811    1.705622      2.47    0.014      1.288159     9.089554
     ip57c96 |    1.938772    .7950943      1.61    0.106      .8678548      4.33118
     ip57c97 |    1.653755    .6916642      1.20    0.229      .7285605     3.753846
     ip57c98 |    1.454574     .638214      0.85    0.393      .6155447     3.437257
     ip57c99 |    .9940678    .4245297     -0.01    0.989      .4304267     2.295793
     ip58c80 |    5.023747     2.23794      3.62    0.000      2.098172     12.02858
     ip58c81 |    5.275835     2.41904      3.63    0.000       2.14785     12.95921
     ip58c82 |    4.843685    2.258627      3.38    0.001      1.942038     12.08075
     ip58c83 |    5.131785     2.46415      3.41    0.001      2.002366     13.15205
     ip58c84 |    5.257829    2.526465      3.45    0.001      2.050178     13.48408
     ip58c85 |    4.933716    2.086541      3.77    0.000      2.153717     11.30212
     ip58c86 |     5.63596     2.55411      3.82    0.000      2.318567     13.69987
     ip58c87 |     4.91571    2.268308      3.45    0.001       1.98979      12.1441
     ip58c88 |    5.113779    2.443788      3.41    0.001      2.004321     13.04718
     ip58c89 |    3.637265     1.59717      2.94    0.003      1.538159     8.600992
     ip58c90 |    4.429541    1.929235      3.42    0.001      1.886374     10.40135
     ip58c91 |    4.249478     2.08638      2.95    0.003      1.623373     11.12379
     ip58c92 |    4.879697    2.280684      3.39    0.001      1.952344     12.19634
     ip58c93 |    4.609603    2.015599      3.49    0.000       1.95644     10.86077
     ip58c94 |    5.275835    2.420497      3.63    0.000      2.146689     12.96622
     ip58c95 |    4.717641    2.138835      3.42    0.001      1.940064     11.47186
     ip58c96 |    3.027526    1.058841      3.17    0.002      1.525424     6.008767
     ip58c97 |    2.680143     .840107      3.15    0.002      1.449919     4.954185
     ip58c98 |    2.180205    .7157669      2.37    0.018      1.145634     4.149053
     ip58c99 |    1.584009    .5376221      1.36    0.175      .8144321     3.080779
     ip59c80 |    4.289429    2.021446      3.09    0.002       1.70318     10.80286
     ip59c81 |    4.122309    1.861337      3.14    0.002      1.701373     9.988071
     ip59c82 |    3.268137    1.421873      2.72    0.006       1.39305     7.667146
     ip59c83 |    3.732361    1.713981      2.87    0.004      1.517377     9.180659
     ip59c84 |    3.992326    1.837925      3.01    0.003      1.619434     9.842124
     ip59c85 |    3.546671    1.578916      2.84    0.004      1.482112     8.487131
     ip59c86 |    3.583809    1.586628      2.88    0.004      1.504874     8.534728
     ip59c87 |    2.915327    1.210167      2.58    0.010      1.292258      6.57696
     ip59c88 |     3.21243    1.502598      2.50    0.013      1.284365      8.03487
     ip59c89 |    2.841051    1.344404      2.21    0.027      1.123789      7.18246
     ip59c90 |    2.692499     1.05581      2.53    0.012      1.248458     5.806806
     ip59c91 |    2.803913    1.197631      2.41    0.016      1.213926     6.476446
     ip59c92 |     2.67393    1.150427      2.29    0.022      1.150617     6.213974
     ip59c93 |    2.636792    1.011952      2.53    0.012      1.242798     5.594369
     ip59c94 |    2.952464    1.170373      2.73    0.006      1.357574     6.421045
     ip59c95 |    2.933895    1.161586      2.72    0.007      1.350323     6.374582
     ip59c96 |     1.82502    .6003778      1.83    0.067      .9577396     3.477666
     ip59c97 |    1.588676    .5333716      1.38    0.168      .8227325     3.067695
     ip59c98 |    1.559012      .47504      1.46    0.145      .8579921     2.832797
     ip59c99 |    1.001186    .3612462      0.00    0.997      .4936123     2.030691
     ip60c80 |     5.03328    2.048576      3.97    0.000      2.266767     11.17623
     ip60c81 |     4.66627    2.225876      3.23    0.001       1.83204     11.88515
     ip60c82 |    5.277953    2.258704      3.89    0.000      2.281357     12.21063
     ip60c83 |    4.963373    1.908049      4.17    0.000      2.336431     10.54389
     ip60c84 |    4.753653    1.971781      3.76    0.000      2.108411     10.71765
     ip60c85 |    5.540103    2.366128      4.01    0.000      2.398708     12.79553
     ip60c86 |      4.7187    1.945225      3.76    0.000      2.103416      10.5857
     ip60c87 |    4.159447    1.820379      3.26    0.001      1.764037     9.807615
     ip60c88 |     4.61384    2.081636      3.39    0.001      1.905567     11.17123
     ip60c89 |    4.491503    1.752341      3.85    0.000      2.090735     9.649048
     ip60c90 |     4.40412    1.708565      3.82    0.000      2.058913     9.420636
     ip60c91 |    5.015803     1.91859      4.22    0.000      2.369999     10.61531
     ip60c92 |    5.120663    1.829107      4.57    0.000      2.542588      10.3128
     ip60c93 |     5.13814    1.721269      4.89    0.000       2.66474     9.907341
     ip60c94 |    5.330383    1.878231      4.75    0.000      2.671937     10.63385
     ip60c95 |    5.522627    1.687753      5.59    0.000      3.033979     10.05261
     ip60c96 |    4.378281    1.311678      4.93    0.000      2.433853      7.87613
     ip60c97 |     2.96241    .8835189      3.64    0.000      1.651125     5.315086
     ip60c98 |    2.931072    .9114892      3.46    0.001      1.593398     5.391736
     ip60c99 |    2.351236    .6813365      2.95    0.003      1.332407     4.149118
     ip61c80 |    6.009976    3.147014      3.42    0.001      2.153558     16.77215
     ip61c81 |    5.687407    2.944845      3.36    0.001      2.061466     15.69106
     ip61c82 |    5.874157    3.039164      3.42    0.001      2.130846     16.19344
     ip61c83 |    6.128817    3.168286      3.51    0.000      2.225097     16.88125
     ip61c84 |    6.332545     3.28988      3.55    0.000      2.287508     17.53049
     ip61c85 |    6.332545    3.278896      3.56    0.000      2.295298     17.47099
     ip61c86 |    6.689069    3.416225      3.72    0.000      2.458341     18.20075
     ip61c87 |    5.449724    2.723404      3.39    0.001      2.046452     14.51268
     ip61c88 |    5.806248     2.97191      3.44    0.001      2.129172     15.83363
     ip61c89 |    5.942067    2.959908      3.58    0.000      2.238363      15.7741
     ip61c90 |    5.398792    2.653616      3.43    0.001      2.060221     14.14749
     ip61c91 |     5.85718    2.897854      3.57    0.000      2.221031     15.44623
     ip61c92 |    5.415769    2.751441      3.33    0.001      2.000846     14.65908
     ip61c93 |    6.026953    2.956909      3.66    0.000       2.30402     15.76556
     ip61c94 |     5.34786    2.652736      3.38    0.001      2.022799     14.13863
     ip61c95 |    5.636475    2.879558      3.38    0.001      2.070839     15.34153
     ip61c96 |     3.83923    1.477932      3.49    0.000      1.805384     8.164296
     ip61c97 |    3.079494    1.062608      3.26    0.001      1.565901      6.05612
     ip61c98 |    2.674486    .9271985      2.84    0.005      1.355637     5.276395
     ip61c99 |    2.050597     .705793      2.09    0.037      1.044494     4.025822
     ip62c80 |    5.760504    2.838887      3.55    0.000      2.192663     15.13383
     ip62c81 |    4.935217    2.532941      3.11    0.002      1.804834     13.49507
     ip62c82 |    5.925561    3.115169      3.38    0.001      2.114649      16.6043
     ip62c83 |    5.083768    2.489671      3.32    0.001      1.946827      13.2753
     ip62c84 |    5.843032    2.897202      3.56    0.000      2.210953     15.44177
     ip62c85 |    5.281837    2.796478      3.14    0.002      1.871177     14.90923
     ip62c86 |     5.00124    2.429825      3.31    0.001      1.929861     12.96073
     ip62c87 |    4.935217    2.482107      3.17    0.002       1.84164     13.22536
     ip62c88 |    4.473056    2.362334      2.84    0.005      1.588778     12.59347
     ip62c89 |     4.57209    2.433614      2.86    0.004      1.610796     12.97744
     ip62c90 |    4.175952    2.153652      2.77    0.006      1.519735     11.47475
     ip62c91 |    4.753653    2.546592      2.91    0.004      1.663521     13.58397
     ip62c92 |    3.944872     1.96339      2.76    0.006       1.48725     10.46362
     ip62c93 |    4.803171    2.650386      2.84    0.004      1.628679     14.16513
     ip62c94 |    4.126435    2.241121      2.61    0.009      1.423234     11.96393
     ip62c95 |    4.060412    2.317058      2.46    0.014      1.326891     12.42524
     ip62c96 |    3.083661    1.391178      2.50    0.013      1.273653     7.465897
     ip62c97 |    2.166885    .9693399      1.73    0.084      .9016901     5.207323
     ip62c98 |    2.028041    .9100977      1.58    0.115       .841577     4.887192
     ip62c99 |    1.618614     .704237      1.11    0.268      .6899172     3.797428
     ip63c80 |    6.286081    2.830834      4.08    0.000       2.60049     15.19514
     ip63c81 |    5.691874    2.530177      3.91    0.000      2.381636     13.60302
     ip63c82 |    5.472956    2.478083      3.75    0.000      2.253249     13.29336
     ip63c83 |    5.879519    2.749289      3.79    0.000      2.351344      14.7017
     ip63c84 |      5.6606    2.549012      3.85    0.000      2.341854     13.68249
     ip63c85 |    6.129711    2.752417      4.04    0.000      2.542295      14.7793
     ip63c86 |    4.784927    2.351805      3.19    0.001      1.826028     12.53844
     ip63c87 |    5.269675    2.481148      3.53    0.000      2.094152     13.26049
     ip63c88 |    4.816201    2.303128      3.29    0.001      1.886499     12.29569
     ip63c89 |    4.440913    1.952676      3.39    0.001      1.875848     10.51349
     ip63c90 |    4.503461    2.067051      3.28    0.001       1.83169     11.07238
     ip63c91 |    4.972572    2.265698      3.52    0.000      2.035825     12.14568
     ip63c92 |    5.394771    2.568141      3.54    0.000      2.122095     13.71454
     ip63c93 |    4.284543    2.088951      2.98    0.003      1.647771     11.14069
     ip63c94 |    4.675468    2.377618      3.03    0.002      1.725692     12.66739
     ip63c95 |    4.253269     2.01321      3.06    0.002      1.681983     10.75534
     ip63c96 |     3.84629    1.663645      3.11    0.002      1.647668     8.978715
     ip63c97 |    2.842202    1.278765      2.32    0.020      1.176744     6.864803
     ip63c98 |    2.547108    1.113814      2.14    0.033      1.081008     6.001583
     ip63c99 |    2.163127    .9914359      1.68    0.092      .8809414     5.311499
     ip64c80 |     7.13048    3.220264      4.35    0.000      2.942385     17.27977
     ip64c81 |    6.612454    2.908599      4.29    0.000      2.792206      15.6595
     ip64c82 |    6.429621    2.817929      4.25    0.000      2.723496     15.17903
     ip64c83 |     7.55709    3.381944      4.52    0.000      3.143587     18.16702
     ip64c84 |    6.856231    3.074148      4.29    0.000      2.847277     16.50978
     ip64c85 |    6.932411     2.98805      4.49    0.000      2.978477      16.1352
     ip64c86 |    5.926831    2.689559      3.92    0.000        2.4353     14.42423
     ip64c87 |    5.881123    2.597488      4.01    0.000      2.474651     13.97676
     ip64c88 |    5.088847     2.32846      3.56    0.000      2.075594      12.4766
     ip64c89 |    4.570821    2.050073      3.39    0.001      1.897663     11.00954
     ip64c90 |    5.606873    2.405227      4.02    0.000      2.418654     12.99774
     ip64c91 |    5.408804    2.380689      3.84    0.000      2.282676     12.81617
     ip64c92 |    4.570821    2.070145      3.36    0.001        1.8814     11.10471
     ip64c93 |     3.99185    1.843545      3.00    0.003      1.614604     9.869208
     ip64c94 |    4.616529    2.050643      3.44    0.001      1.932926     11.02594
     ip64c95 |    4.616529     1.96937      3.59    0.000      2.000786     10.65198
     ip64c96 |    3.515281    1.324835      3.34    0.001      1.679423        7.358
     ip64c97 |    2.716151    .9260381      2.93    0.003      1.392346     5.298593
     ip64c98 |    2.285444    .7809431      2.42    0.016      1.169802     4.465075
     ip64c99 |    2.025172    .6558446      2.18    0.029      1.073504     3.820502
     ip65c80 |    8.608379    3.662853      5.06    0.000      3.738835     19.82013
     ip65c81 |    8.532198    3.575034      5.12    0.000      3.753213     19.39629
     ip65c82 |    8.181769     3.38872      5.07    0.000      3.633265     18.42457
     ip65c83 |    7.877048    3.420514      4.75    0.000      3.363097     18.44963
     ip65c84 |    7.709451    3.190644      4.94    0.000      3.425658     17.35014
     ip65c85 |    7.755159    3.171084      5.01    0.000      3.479641     17.28411
     ip65c86 |    7.221897    3.042766      4.69    0.000      3.162414      16.4924
     ip65c87 |    7.328549    3.128724      4.67    0.000      3.174101     16.92058
     ip65c88 |    6.399149    2.693767      4.41    0.000       2.80416     14.60298
     ip65c89 |    7.160952    2.943635      4.79    0.000      3.199407     16.02773
     ip65c90 |    7.541854    3.202079      4.76    0.000      3.281554     17.33312
     ip65c91 |    6.307732    2.661885      4.36    0.000      2.758439     14.42392
     ip65c92 |    6.764814     2.82161      4.58    0.000      2.986888      15.3212
     ip65c93 |    6.505801    2.792063      4.36    0.000        2.8054     15.08714
     ip65c94 |    6.018247    2.565558      4.21    0.000      2.609791     13.87824
     ip65c95 |    6.322969    2.676705      4.36    0.000      2.757919     14.49641
     ip65c96 |    4.582219    1.699397      4.10    0.000      2.215096     9.478925
     ip65c97 |    3.612389    1.330593      3.49    0.000      1.754938     7.435795
     ip65c98 |    3.144512     1.15943      3.11    0.002      1.526519     6.477455
     ip65c99 |    2.733649    1.027353      2.68    0.007      1.308718      5.71004
     ip56c00 |    2.414949    .8615576      2.47    0.013      1.200144     4.859402
     ip56c01 |    2.086596    .7437691      2.06    0.039      1.037592      4.19614
     ip56c02 |    1.672807     .480475      1.79    0.073      .9527039     2.937201
     ip56c03 |    1.520286    .5316472      1.20    0.231      .7660524     3.017118
     ip56c04 |    1.534434    .5339781      1.23    0.219      .7757701     3.035035
     ip57c00 |     1.19626    .4121927      0.52    0.603      .6088759     2.350294
     ip57c01 |    .9447452    .3551441     -0.15    0.880      .4522047      1.97376
     ip57c02 |    .7758106    .3024175     -0.65    0.515      .3613684     1.665564
     ip57c03 |    .8791733    .3222547     -0.35    0.725      .4286202     1.803335
     ip57c04 |    .7356983    .2606121     -0.87    0.386      .3674278     1.473084
     ip58c00 |    1.772471    .4491332      2.26    0.024      1.078673     2.912516
     ip58c01 |    1.963335    .4483594      2.95    0.003      1.254899     3.071709
     ip58c02 |    1.094932    .1936416      0.51    0.608      .7741937     1.548547
     ip58c03 |    1.263733    .2169664      1.36    0.173      .9026417     1.769276
     ip58c04 |     1.28446     .242359      1.33    0.185      .8873834     1.859217
     ip59c00 |    .9005831    .2200733     -0.43    0.668      .5578503     1.453884
     ip59c01 |    1.044827    .2242671      0.20    0.838      .6860216     1.591295
     ip59c02 |    .7197792     .132831     -1.78    0.075      .5013201     1.033436
     ip59c03 |    .7545518    .1547423     -1.37    0.170      .5048077     1.127852
     ip59c04 |    .7024037    .1343586     -1.85    0.065      .4827981     1.021899
     ip60c00 |    1.955477    .7919669      1.66    0.098      .8841312     4.325027
     ip60c01 |    1.873611    .7404286      1.59    0.112      .8635648     4.065033
     ip60c02 |    1.417093    .5788563      0.85    0.393      .6363532      3.15572
     ip60c03 |    1.369378    .6142023      0.70    0.483      .5685083     3.298449
     ip60c04 |    1.359996    .5065595      0.83    0.409      .6553747     2.822187
     ip61c00 |    2.391418    .5503611      3.79    0.000       1.52321     3.754491
     ip61c01 |    2.053351    .4928995      3.00    0.003       1.28273     3.286935
     ip61c02 |    1.506862     .306883      2.01    0.044      1.010928     2.246087
     ip61c03 |    1.636255     .312873      2.58    0.010      1.124839      2.38019
     ip61c04 |    1.564567    .3764847      1.86    0.063      .9762656     2.507382
     ip62c00 |    1.656009      .51435      1.62    0.104      .9009127     3.043986
     ip62c01 |    1.732266    .6171369      1.54    0.123      .8617188     3.482279
     ip62c02 |     1.12518    .3659868      0.36    0.717      .5947741      2.12859
     ip62c03 |    1.087328    .3547777      0.26    0.797      .5736237     2.061076
     ip62c04 |    1.205901    .3999464      0.56    0.572      .6295118     2.310038
     ip63c00 |    2.162577      .65982      2.53    0.011      1.189222     3.932603
     ip63c01 |    2.110303    .6177196      2.55    0.011      1.189007     3.745461
     ip63c02 |    1.460599     .375759      1.47    0.141      .8821605     2.418322
     ip63c03 |    1.484234    .4109551      1.43    0.154      .8626242     2.553779
     ip63c04 |    1.421344    .4011695      1.25    0.213      .8174296     2.471428
     ip64c00 |    1.992305    .4284952      3.20    0.001      1.307024     3.036883
     ip64c01 |    1.773714    .4141874      2.45    0.014      1.122318     2.803182
     ip64c02 |    1.252985    .2380281      1.19    0.235      .8634642     1.818225
     ip64c03 |    1.242426    .2211699      1.22    0.223      .8764841     1.761151
     ip64c04 |    1.238496    .2220905      1.19    0.233      .8714748     1.760088
     ip65c00 |    2.604133      .61574      4.05    0.000      1.638321     4.139305
     ip65c01 |    2.305509    .4772049      4.04    0.000      1.536672     3.459015
     ip65c02 |    1.439268    .2377828      2.20    0.028      1.041151     1.989617
     ip65c03 |    1.412041    .2100469      2.32    0.020       1.05494     1.890023
     ip65c04 |    1.350127    .2382667      1.70    0.089      .9553378     1.908061
       d1c95 |    3.781613    1.116964      4.50    0.000       2.11963     6.746742
       d1c00 |    1.883348    .5291255      2.25    0.024       1.08589     3.266443
       d2c95 |    6.194814    2.176754      5.19    0.000      3.111218     12.33463
       d2c00 |    5.588661    2.408884      3.99    0.000       2.40112     13.00774
       _cons |    1.682916    .7337551      1.19    0.233      .7160391      3.95538
-------------+----------------------------------------------------------------

.   * Column 2: Journal fixed effects, no age profile;
. xtpqml cit ip* d1c* d2c*, i(journal) irr fe cluster(journal);
note: 1 group (104 obs) dropped because of all zero outcomes

Iteration 0:   log likelihood = -38724.642
Iteration 1:   log likelihood =  -35854.44
Iteration 2:   log likelihood = -35742.408
Iteration 3:   log likelihood = -35742.108
Iteration 4:   log likelihood = -35742.108

Conditional fixed-effects Poisson regression    Number of obs     =      8,840
Group variable: journal                         Number of groups  =         38

                                                Obs per group:
                                                              min =         52
                                                              avg =      232.6
                                                              max =        260

                                                Wald chi2(254)    =    5651.02
Log likelihood  = -35742.108                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip56c80 |    .0824956    .0728265      1.13    0.257     -.0602418     .2252329
     ip56c81 |   -.0857003    .0779108     -1.10    0.271     -.2384027     .0670021
     ip56c82 |   -.0003404    .0752666     -0.00    0.996     -.1478602     .1471793
     ip56c83 |   -.0003404    .0752666     -0.00    0.996     -.1478602     .1471793
     ip56c84 |    -.027992    .0761085     -0.37    0.713     -.1771618     .1211779
     ip56c85 |   -.0326758    .0762524     -0.43    0.668     -.1821279     .1167762
     ip56c86 |    .0132038    .0748592      0.18    0.860     -.1335176     .1599252
     ip56c87 |   -.0421099    .0765437     -0.55    0.582     -.1921327      .107913
     ip56c88 |    -.080762    .0777541     -1.04    0.299     -.2331573     .0716333
     ip56c89 |   -.0186896    .0758237     -0.25    0.805     -.1673012     .1299221
     ip56c90 |    .0132038    .0748592      0.18    0.860     -.1335176     .1599252
     ip56c91 |   -.1006632    .0783883     -1.28    0.199     -.2543014     .0529751
     ip56c92 |    .0041947    .0751298      0.06    0.955      -.143057     .1514464
     ip56c93 |    .1433663    .0711098      2.02    0.044      .0039936      .282739
     ip56c94 |    .0949697    .0724695      1.31    0.190     -.0470679     .2370074
     ip56c95 |    .0698638    .0731908      0.95    0.340     -.0735874     .2133151
     ip56c96 |    .1989217     .070252      2.83    0.005      .0612303     .3366131
     ip56c97 |    .2982364    .0678761      4.39    0.000      .1652017     .4312711
     ip56c98 |    .1566047    .0714845      2.19    0.028      .0164977     .2967116
     ip56c99 |    .1631247    .0714724      2.28    0.022      .0230412     .3032081
     ip57c80 |   -.2406764    .0830659     -2.90    0.004     -.4034826    -.0778702
     ip57c81 |   -.3250638     .086075     -3.78    0.000     -.4937677    -.1563599
     ip57c82 |   -.2941016    .0849539     -3.46    0.001     -.4606081     -.127595
     ip57c83 |    -.270004    .0840951     -3.21    0.001     -.4348273    -.1051807
     ip57c84 |   -.2581696    .0836777     -3.09    0.002     -.4221748    -.0941643
     ip57c85 |   -.2178183    .0822759     -2.65    0.008      -.379076    -.0565605
     ip57c86 |   -.3250638     .086075     -3.78    0.000     -.4937677    -.1563599
     ip57c87 |   -.4172342     .089533     -4.66    0.000     -.5927156    -.2417529
     ip57c88 |   -.4381409     .090343     -4.85    0.000     -.6152099     -.261072
     ip57c89 |   -.5036189     .092943     -5.42    0.000     -.6857837     -.321454
     ip57c90 |   -.4172342     .089533     -4.66    0.000     -.5927156    -.2417529
     ip57c91 |   -.4381409     .090343     -4.85    0.000     -.6152099     -.261072
     ip57c92 |   -.3063717    .0853958     -3.59    0.000     -.4737443     -.138999
     ip57c93 |   -.4381409     .090343     -4.85    0.000     -.6152099     -.261072
     ip57c94 |   -.5187707    .0935585     -5.54    0.000     -.7021419    -.3353994
     ip57c95 |   -.2759742    .0843067     -3.27    0.001     -.4412123     -.110736
     ip57c96 |   -.4977906     .092301     -5.39    0.000     -.6786973    -.3168838
     ip57c97 |   -.3616851    .0881177     -4.10    0.000     -.5343927    -.1889776
     ip57c98 |   -.3529298     .087668     -4.03    0.000     -.5247559    -.1811038
     ip57c99 |   -.5185938    .0940885     -5.51    0.000      -.703004    -.3341837
     ip58c80 |    .1812881     .068504      2.65    0.008      .0470227     .3155535
     ip58c81 |    .2302489    .0672424      3.42    0.001      .0984563     .3620416
     ip58c82 |    .1447877    .0694697      2.08    0.037      .0086296     .2809458
     ip58c83 |    .2025655     .067951      2.98    0.003       .069384      .335747
     ip58c84 |    .2268301    .0673292      3.37    0.001      .0948673      .358793
     ip58c85 |    .1632044    .0689797      2.37    0.018      .0280066     .2984022
     ip58c86 |    .2962795    .0656007      4.52    0.000      .1677044     .4248546
     ip58c87 |    .1595481    .0690766      2.31    0.021      .0241605     .2949357
     ip58c88 |    .1990506    .0680419      2.93    0.003       .065691     .3324101
     ip58c89 |    -.141656      .07784     -1.82    0.069     -.2942195     .0109076
     ip58c90 |    .0554079    .0719278      0.77    0.441      -.085568     .1963838
     ip58c91 |    .0139081    .0731154      0.19    0.849     -.1293954     .1572116
     ip58c92 |    .1521951     .069272      2.20    0.028      .0164246     .2879657
     ip58c93 |    .0952538    .0708154      1.35    0.179     -.0435418     .2340494
     ip58c94 |    .2302489    .0672424      3.42    0.001      .0984563     .3620416
     ip58c95 |    .1184208    .0701809      1.69    0.092     -.0191313     .2559729
     ip58c96 |   -.0165034    .0743202     -0.22    0.824     -.1621684     .1291615
     ip58c97 |    .1353171     .070462      1.92    0.055      -.002786     .2734201
     ip58c98 |    .0572075    .0725179      0.79    0.430     -.0849249     .1993398
     ip58c99 |    -.058786    .0759833     -0.77    0.439     -.2077105     .0901386
     ip59c80 |   -.0059117    .0737403     -0.08    0.936       -.15044     .1386165
     ip59c81 |   -.0456521    .0749208     -0.61    0.542     -.1924942       .10119
     ip59c82 |   -.2778455    .0824041     -3.37    0.001     -.4393546    -.1163363
     ip59c83 |   -.1450245    .0779984     -1.86    0.063     -.2978986     .0078495
     ip59c84 |   -.0776914    .0758933     -1.02    0.306     -.2264395     .0710566
     ip59c85 |    -.196056    .0796506     -2.46    0.014     -.3521684    -.0399436
     ip59c86 |   -.1856393    .0793093     -2.34    0.019     -.3410827    -.0301958
     ip59c87 |   -.3920836    .0864757     -4.53    0.000     -.5615729    -.2225944
     ip59c88 |   -.2950379    .0829998     -3.55    0.000     -.4577145    -.1323612
     ip59c89 |   -.4178915    .0874332     -4.78    0.000     -.5892575    -.2465255
     ip59c90 |   -.4715957    .0894716     -5.27    0.000     -.6469569    -.2962345
     ip59c91 |   -.4310496    .0879269     -4.90    0.000     -.6033832    -.2587161
     ip59c92 |   -.4785162    .0897389     -5.33    0.000     -.6544011    -.3026312
     ip59c93 |   -.4925024    .0902822     -5.46    0.000     -.6694523    -.3155525
     ip59c94 |   -.3794253    .0860112     -4.41    0.000     -.5480042    -.2108463
     ip59c95 |   -.3857344    .0862423     -4.47    0.000     -.5547662    -.2167026
     ip59c96 |   -.5426801     .091828     -5.91    0.000     -.7226597    -.3627005
     ip59c97 |   -.4031571    .0875072     -4.61    0.000     -.5746681    -.2316461
     ip59c98 |   -.2915349    .0834134     -3.50    0.000     -.4550222    -.1280477
     ip59c99 |   -.5281119     .092171     -5.73    0.000     -.7087637    -.3474601
     ip60c80 |    .1762252    .0676519      2.60    0.009        .04363     .3088204
     ip60c81 |    .1005134     .069641      1.44    0.149     -.0359805     .2370072
     ip60c82 |    .2236917    .0664516      3.37    0.001       .093449     .3539344
     ip60c83 |    .1622389    .0680123      2.39    0.017      .0289372     .2955407
     ip60c84 |    .1190668    .0691449      1.72    0.085     -.0164548     .2545884
     ip60c85 |    .2721665     .065262      4.17    0.000      .1442553     .4000776
     ip60c86 |    .1116867    .0693416      1.61    0.107     -.0242204     .2475937
     ip60c87 |   -.0144646    .0728439     -0.20    0.843      -.157236     .1283068
     ip60c88 |    .0892138    .0699459      1.28    0.202     -.0478777     .2263053
     ip60c89 |    .0623408    .0706796      0.88    0.378     -.0761887     .2008702
     ip60c90 |    .0426938    .0712236      0.60    0.549      -.096902     .1822895
     ip60c91 |    .1727469    .0677412      2.55    0.011      .0399766     .3055173
     ip60c92 |    .1934373    .0672125      2.88    0.004      .0617032     .3251714
     ip60c93 |    .1968445    .0671261      2.93    0.003      .0652797     .3284092
     ip60c94 |    .2335765    .0662061      3.53    0.000       .103815     .3633379
     ip60c95 |    .2690069    .0653384      4.12    0.000       .140946     .3970679
     ip60c96 |    .3382133    .0644378      5.25    0.000      .2119175      .464509
     ip60c97 |    .2153896    .0673686      3.20    0.001      .0833496     .3474296
     ip60c98 |    .3311719    .0645432      5.13    0.000      .2046696     .4576743
     ip60c99 |    .3116277     .065162      4.78    0.000      .1839126     .4393429
     ip61c80 |    .3810274    .0626846      6.08    0.000      .2581677      .503887
     ip61c81 |     .325861    .0639498      5.10    0.000      .2005217     .4512004
     ip61c82 |    .3581693    .0632035      5.67    0.000      .2342927     .4820458
     ip61c83 |    .4006084    .0622462      6.44    0.000      .2786081     .5226087
     ip61c84 |    .4333089    .0615262      7.04    0.000      .3127198      .553898
     ip61c85 |    .4333089    .0615262      7.04    0.000      .3127198      .553898
     ip61c86 |    .4880814    .0603538      8.09    0.000      .3697902     .6063726
     ip61c87 |    .2831716    .0649598      4.36    0.000      .1558528     .4104904
     ip61c88 |    .3465412    .0634703      5.46    0.000      .2221417     .4709408
     ip61c89 |    .3696636    .0629416      5.87    0.000      .2463003      .493027
     ip61c90 |    .2737819    .0651856      4.20    0.000      .1460205     .4015433
     ip61c91 |    .3552749    .0632697      5.62    0.000      .2312685     .4792813
     ip61c92 |    .2769216    .0651099      4.25    0.000      .1493085     .4045347
     ip61c93 |    .3838483    .0626211      6.13    0.000      .2611131     .5065835
     ip61c94 |    .2643031    .0654149      4.04    0.000      .1360923      .392514
     ip61c95 |    .3168655    .0641604      4.94    0.000      .1911134     .4426175
     ip61c96 |    .2260156    .0669569      3.38    0.001      .0947825     .3572486
     ip61c97 |    .2691515    .0660171      4.08    0.000      .1397604     .3985425
     ip61c98 |    .2525613    .0663568      3.81    0.000      .1225043     .3826183
     ip61c99 |    .1851415    .0681654      2.72    0.007      .0515397     .3187433
     ip62c80 |    .3668024    .0630066      5.82    0.000      .2433117     .4902931
     ip62c81 |    .2121741    .0667007      3.18    0.001       .081443     .3429051
     ip62c82 |    .3950529      .06237      6.33    0.000      .2728098     .5172959
     ip62c83 |    .2418303    .0659641      3.67    0.000      .1125431     .3711175
     ip62c84 |    .3810274    .0626846      6.08    0.000      .2581677      .503887
     ip62c85 |    .2800515    .0650347      4.31    0.000      .1525859     .4075171
     ip62c86 |    .2254633    .0663689      3.40    0.001      .0953826      .355544
     ip62c87 |    .2121741    .0667007      3.18    0.001       .081443     .3429051
     ip62c88 |    .1138493    .0692426      1.64    0.100     -.0218638     .2495624
     ip62c89 |     .135748     .068663      1.98    0.048      .0011709     .2703251
     ip62c90 |      .04512    .0711131      0.63    0.526     -.0942592     .1844991
     ip62c91 |     .174691    .0676515      2.58    0.010      .0420964     .3072855
     ip62c92 |    -.011806    .0727228     -0.16    0.871       -.15434     .1307281
     ip62c93 |    .1850538    .0673864      2.75    0.006      .0529788     .3171287
     ip62c94 |    .0331914    .0714458      0.46    0.642     -.1068398     .1732226
     ip62c95 |     .017062    .0718996      0.24    0.812     -.1238585     .1579826
     ip62c96 |    .0271014    .0719699      0.38    0.706     -.1139571     .1681599
     ip62c97 |   -.0660558    .0749565     -0.88    0.378     -.2129678     .0808562
     ip62c98 |    -.009803    .0732446     -0.13    0.894     -.1533597     .1337538
     ip62c99 |     -.03971    .0742096     -0.54    0.593     -.1851581     .1057381
     ip63c80 |    .5056494    .0599314      8.44    0.000      .3881861     .6231128
     ip63c81 |    .4063512    .0620601      6.55    0.000      .2847156     .5279868
     ip63c82 |    .3671305    .0629393      5.83    0.000      .2437718     .4904892
     ip63c83 |    .4387865    .0613497      7.15    0.000      .3185433     .5590296
     ip63c84 |    .4008415    .0621823      6.45    0.000      .2789665     .5227166
     ip63c85 |    .4804592    .0604585      7.95    0.000      .3619627     .5989556
     ip63c86 |    .2327824    .0661225      3.52    0.000      .1031848     .3623801
     ip63c87 |    .3292803    .0638088      5.16    0.000      .2042173     .4543433
     ip63c88 |    .2392971    .0659618      3.63    0.000      .1100143     .3685799
     ip63c89 |    .1581716    .0680098      2.33    0.020      .0248748     .2914684
     ip63c90 |    .1721578    .0676493      2.54    0.011      .0395676      .304748
     ip63c91 |    .2712487    .0651833      4.16    0.000      .1434918     .3990056
     ip63c92 |    .3527418    .0632674      5.58    0.000        .22874     .4767435
     ip63c93 |    .1223254    .0689481      1.77    0.076     -.0128104     .2574613
     ip63c94 |    .2096409    .0666985      3.14    0.002      .0789143     .3403676
     ip63c95 |    .1149994    .0691424      1.66    0.096     -.0205173     .2505161
     ip63c96 |    .2849541    .0655248      4.35    0.000      .1565279     .4133804
     ip63c97 |    .2344569    .0667898      3.51    0.000      .1035513     .3653626
     ip63c98 |    .2436028    .0665064      3.66    0.000      .1132527     .3739528
     ip63c99 |    .2707738    .0660119      4.10    0.000      .1413929     .4001547
     ip64c80 |    .6210874    .0569302     10.91    0.000      .5095064     .7326685
     ip64c81 |    .5456637    .0583818      9.35    0.000      .4312374       .66009
     ip64c82 |    .5176245    .0589403      8.78    0.000      .4021036     .6331453
     ip64c83 |    .6791951    .0558607     12.16    0.000      .5697101     .7886801
     ip64c84 |    .5818667    .0576759     10.09    0.000       .468824     .6949095
     ip64c85 |    .5929166    .0574638     10.32    0.000      .4802895     .7055436
     ip64c86 |    .4361985    .0606216      7.20    0.000      .3173822     .5550147
     ip64c87 |    .4284565    .0607862      7.05    0.000      .3093177     .5475953
     ip64c88 |    .2837601     .064018      4.43    0.000      .1582872     .4092331
     ip64c89 |    .1764016    .0666155      2.65    0.008      .0458377     .3069656
     ip64c90 |    .3807021    .0618197      6.16    0.000      .2595376     .5018666
     ip64c91 |    .3447369    .0626194      5.51    0.000      .2220051     .4674687
     ip64c92 |    .1764016    .0666155      2.65    0.008      .0458377     .3069656
     ip64c93 |    .0409637    .0701504      0.58    0.559     -.0965287      .178456
     ip64c94 |     .186352    .0663673      2.81    0.005      .0562744     .3164295
     ip64c95 |     .186352    .0663673      2.81    0.005      .0562744     .3164295
     ip64c96 |    .1789241    .0670612      2.67    0.008      .0474866     .3103616
     ip64c97 |    .1679656    .0674763      2.49    0.013      .0357145     .3002167
     ip64c98 |    .1124371      .06882      1.63    0.102     -.0224476     .2473217
     ip64c99 |    .1798489    .0672541      2.67    0.007      .0480332     .3116646
     ip65c80 |    .8094449    .0536116     15.10    0.000      .7043681     .9145217
     ip65c81 |    .8005559    .0537588     14.89    0.000      .6951907     .9059212
     ip65c82 |    .7586172    .0544655     13.93    0.000      .6518669     .8653676
     ip65c83 |     .720662    .0551228     13.07    0.000      .6126233     .8287008
     ip65c84 |    .6991558    .0555029     12.60    0.000      .5903721     .8079396
     ip65c85 |    .7050672    .0553979     12.73    0.000      .5964893      .813645
     ip65c86 |    .6338265    .0566921     11.18    0.000       .522712      .744941
     ip65c87 |    .6484864    .0564207     11.49    0.000      .5379039     .7590689
     ip65c88 |    .5128739    .0590359      8.69    0.000      .3971655     .6285822
     ip65c89 |    .6253518    .0568502     11.00    0.000      .5139274     .7367763
     ip65c90 |    .6771769    .0558972     12.11    0.000      .5676205     .7867333
     ip65c91 |    .4984851    .0593275      8.40    0.000      .3822054     .6147648
     ip65c92 |    .5684437    .0579357      9.81    0.000      .4548919     .6819955
     ip65c93 |    .5294032    .0587044      9.02    0.000      .4143446     .6444617
     ip65c94 |    .4515049    .0602987      7.49    0.000      .3333216     .5696882
     ip65c95 |    .5008977    .0592784      8.45    0.000      .3847141     .6170812
     ip65c96 |     .443988    .0612641      7.25    0.000      .3239125     .5640635
     ip65c97 |    .4531192    .0609729      7.43    0.000      .3336146     .5726239
     ip65c98 |    .4315354    .0613792      7.03    0.000      .3112343     .5518364
     ip65c99 |    .4798312    .0605622      7.92    0.000      .3611316     .5985309
     ip56c00 |    .2692512     .059207      4.55    0.000      .1532077     .3852947
     ip56c01 |    .1991407    .0606614      3.28    0.001      .0802465     .3180348
     ip56c02 |    .2863455    .0574852      4.98    0.000      .1736766     .3990144
     ip56c03 |    .1907412    .0599968      3.18    0.001      .0731496     .3083327
     ip56c04 |    .2263254    .0589745      3.84    0.000      .1107376     .3419133
     ip57c00 |   -.4332273    .0816057     -5.31    0.000     -.5931715    -.2732831
     ip57c01 |   -.5932331    .0872738     -6.80    0.000     -.7642867    -.4221796
     ip57c02 |    -.507964    .0828036     -6.13    0.000      -.670256    -.3456719
     ip57c03 |   -.3521842    .0769304     -4.58    0.000      -.502965    -.2014033
     ip57c04 |   -.5042251    .0825624     -6.11    0.000     -.6660444    -.3424058
     ip58c00 |   -.0410023    .0666119     -0.62    0.538     -.1715591     .0895546
     ip58c01 |    .1433494    .0608316      2.36    0.018      .0241216     .2625772
     ip58c02 |   -.1130307    .0673113     -1.68    0.093     -.2449585     .0188971
     ip58c03 |    .0303479    .0630417      0.48    0.630     -.0932116     .1539073
     ip58c04 |    .0798375    .0615233      1.30    0.194     -.0407459      .200421
     ip59c00 |   -.7287113    .0917642     -7.94    0.000     -.9085658    -.5488568
     ip59c01 |   -.5065189    .0819178     -6.18    0.000     -.6670748    -.3459631
     ip59c02 |    -.572461    .0835976     -6.85    0.000     -.7363092    -.4086128
     ip59c03 |   -.4960799    .0806289     -6.15    0.000     -.6541095    -.3380502
     ip59c04 |    -.533926    .0818298     -6.52    0.000     -.6943095    -.3735426
     ip60c00 |    .0360785    .0634602      0.57    0.570     -.0883013     .1604582
     ip60c01 |    .0820708    .0616356      1.33    0.183     -.0387327     .2028743
     ip60c02 |    .1192398    .0596762      2.00    0.046      .0022765      .236203
     ip60c03 |    .1126227    .0598482      1.88    0.060     -.0046777     .2299231
     ip60c04 |    .1378244    .0590062      2.34    0.020      .0221743     .2534744
     ip61c00 |    .2477173    .0577708      4.29    0.000      .1344886     .3609461
     ip61c01 |    .1919891    .0586907      3.27    0.001      .0769575     .3070207
     ip61c02 |    .2207986    .0569928      3.87    0.000      .1090948     .3325024
     ip61c03 |    .3296921    .0543169      6.07    0.000      .2232329     .4361513
     ip61c04 |    .3154734    .0545032      5.79    0.000      .2086491     .4222977
     ip62c00 |   -.1081274    .0676747     -1.60    0.110     -.2407674     .0245127
     ip62c01 |    .0323011    .0629771      0.51    0.608     -.0911318     .1557339
     ip62c02 |   -.0640057    .0647901     -0.99    0.323     -.1909919     .0629804
     ip62c03 |   -.0719045    .0650181     -1.11    0.269     -.1993376     .0555285
     ip62c04 |    .0619244    .0610093      1.01    0.310     -.0576517     .1815004
     ip63c00 |    .1793455    .0594705      3.02    0.003      .0627855     .2959055
     ip63c01 |    .2566159    .0570092      4.50    0.000        .14488     .3683519
     ip63c02 |    .2411789     .056421      4.27    0.000      .1305957     .3517621
     ip63c03 |    .2823582    .0553999      5.10    0.000      .1737764     .3909399
     ip63c04 |    .2677959     .055599      4.82    0.000      .1588238      .376768
     ip64c00 |    .0755654     .061446      1.23    0.219     -.0448666     .1959974
     ip64c01 |    .0662355    .0611413      1.08    0.279     -.0535994     .1860703
     ip64c02 |    .1184872    .0586029      2.02    0.043      .0036277     .2333468
     ip64c03 |    .1335099    .0582064      2.29    0.022      .0194274     .2475923
     ip64c04 |    .1570883    .0574406      2.73    0.006      .0445068     .2696697
     ip65c00 |    .3508644    .0543826      6.45    0.000      .2442764     .4574525
     ip65c01 |    .3428383     .054339      6.31    0.000      .2363357     .4493408
     ip65c02 |     .299589    .0539958      5.55    0.000      .1937592     .4054187
     ip65c03 |     .346665    .0528907      6.55    0.000      .2430012     .4503288
     ip65c04 |    .3114688    .0536275      5.81    0.000      .2063609     .4165767
       d1c95 |    .0819408    .0315039      2.60    0.009      .0201943     .1436873
       d1c00 |    .0919733    .0427852      2.15    0.032      .0081159     .1758307
       d2c95 |   -.0033895    .0241973     -0.14    0.889     -.0508155     .0440364
       d2c00 |    .1586536    .0281059      5.64    0.000      .1035671     .2137401
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     ip56c80 |    1.085994    .2600688      0.34    0.730      .6791811     1.736478
     ip56c81 |    .9178693     .224207     -0.35    0.726      .5686679     1.481504
     ip56c82 |    .9996596    .2685413     -0.00    0.999      .5904614     1.692438
     ip56c83 |    .9996596    .2511477     -0.00    0.999      .6109449     1.635695
     ip56c84 |    .9723962    .2228065     -0.12    0.903      .6205921     1.523632
     ip56c85 |    .9678523    .1881082     -0.17    0.866      .6612606     1.416594
     ip56c86 |    1.013291    .2005073      0.07    0.947      .6875447     1.493371
     ip56c87 |    .9587645    .1882729     -0.21    0.830      .6524709     1.408843
     ip56c88 |    .9224132    .1980681     -0.38    0.707       .605548     1.405084
     ip56c89 |     .981484    .2345332     -0.08    0.938      .6144436     1.567778
     ip56c90 |    1.013291    .2384211      0.06    0.955       .638928     1.607003
     ip56c91 |    .9042376    .2331728     -0.39    0.696      .5454889     1.498922
     ip56c92 |    1.004204     .252191      0.02    0.987      .6138397     1.642814
     ip56c93 |    1.154152    .3598523      0.46    0.646       .626423     2.126467
     ip56c94 |    1.099626    .3100135      0.34    0.736      .6328032     1.910825
     ip56c95 |    1.072362     .327169      0.23    0.819      .5897213     1.950007
     ip56c96 |    1.220086    .3820919      0.64    0.525      .6604221      2.25403
     ip56c97 |     1.34748    .4591618      0.88    0.381       .690988     2.627691
     ip56c98 |    1.169533    .3908067      0.47    0.639      .6075448     2.251369
     ip56c99 |    1.177183    .3740398      0.51    0.608      .6315129     2.194351
     ip57c80 |     .786096    .2088223     -0.91    0.365      .4670445     1.323101
     ip57c81 |    .7224813    .1737954     -1.35    0.177      .4508863     1.157674
     ip57c82 |    .7452008    .1593542     -1.38    0.169      .4900629     1.133169
     ip57c83 |    .7633764    .1882149     -1.10    0.273      .4708364     1.237677
     ip57c84 |    .7724642    .1833485     -1.09    0.277      .4851111      1.23003
     ip57c85 |    .8042716    .2037018     -0.86    0.390        .48957     1.321267
     ip57c86 |    .7224813    .1948345     -1.21    0.228      .4258725      1.22567
     ip57c87 |    .6588666    .1514517     -1.82    0.070      .4198889     1.033857
     ip57c88 |    .6452348    .1886566     -1.50    0.134      .3637808     1.144447
     ip57c89 |    .6043397    .1422061     -2.14    0.032      .3810539     .9584641
     ip57c90 |    .6588666    .1600402     -1.72    0.086      .4092971     1.060611
     ip57c91 |    .6452348    .1967689     -1.44    0.151      .3549261     1.172999
     ip57c92 |     .736113    .2148162     -1.05    0.294      .4154728     1.304207
     ip57c93 |    .6452348    .1800036     -1.57    0.116      .3734693     1.114758
     ip57c94 |    .5952519    .1702552     -1.81    0.070      .3398117     1.042709
     ip57c95 |    .7588325    .2065828     -1.01    0.311      .4450582     1.293824
     ip57c96 |    .6078722    .1769608     -1.71    0.087      .3435695     1.075499
     ip57c97 |    .6965016    .2228325     -1.13    0.258      .3720458     1.303911
     ip57c98 |    .7026265    .2357467     -1.05    0.293       .364022     1.356193
     ip57c99 |    .5953571    .1827667     -1.69    0.091      .3261895     1.086639
     ip58c80 |     1.19876    .2368657      0.92    0.359      .8138448     1.765726
     ip58c81 |    1.258913    .2763187      1.05    0.294      .8187771     1.935646
     ip58c82 |    1.155794    .2516894      0.66    0.506      .7542583     1.771091
     ip58c83 |     1.22454     .271427      0.91    0.361       .793047     1.890807
     ip58c84 |    1.254617    .2990776      0.95    0.341      .7863216     2.001806
     ip58c85 |    1.177277    .2392244      0.80    0.422      .7905211     1.753251
     ip58c86 |    1.344846    .2686832      1.48    0.138      .9091034     1.989445
     ip58c87 |    1.172981    .2472404      0.76    0.449      .7760237     1.772992
     ip58c88 |    1.220244      .28272      0.86    0.390      .7748729     1.921599
     ip58c89 |    .8679198    .1787722     -0.69    0.492      .5796302     1.299595
     ip58c90 |    1.056972    .2060833      0.28    0.776      .7212737     1.548911
     ip58c91 |    1.014005     .234461      0.06    0.952      .6445004     1.595355
     ip58c92 |    1.164387    .2629755      0.67    0.500      .7479192      1.81276
     ip58c93 |    1.099938    .2242674      0.47    0.640      .7375914      1.64029
     ip58c94 |    1.258913    .2539459      1.14    0.254      .8477989     1.869385
     ip58c95 |    1.125718    .2650161      0.50    0.615       .709643     1.785743
     ip58c96 |     .983632    .1878012     -0.09    0.931       .676575     1.430044
     ip58c97 |      1.1449    .2018454      0.77    0.443      .8104028     1.617461
     ip58c98 |    1.058875     .220578      0.27    0.784      .7039278     1.592801
     ip58c99 |    .9429086    .1941515     -0.29    0.775      .6297978     1.411686
     ip59c80 |    .9941057    .1969673     -0.03    0.976      .6741858     1.465836
     ip59c81 |    .9553743     .190991     -0.23    0.819       .645666     1.413641
     ip59c82 |    .7574139    .1406002     -1.50    0.134      .5264086     1.089792
     ip59c83 |    .8650011    .1735692     -0.72    0.470      .5837359      1.28179
     ip59c84 |    .9252499    .1911882     -0.38    0.707       .617123     1.387223
     ip59c85 |    .8219662    .1749043     -0.92    0.357      .5416625     1.247324
     ip59c86 |    .8305732    .1825741     -0.84    0.398      .5398453     1.277869
     ip59c87 |    .6756476    .1252975     -2.11    0.034      .4697498     .9717933
     ip59c88 |    .7445034     .150509     -1.46    0.144      .5009421     1.106486
     ip59c89 |    .6584336    .1379493     -1.99    0.046      .4366924     .9927695
     ip59c90 |    .6240057    .1307959     -2.25    0.024      .4137814      .941036
     ip59c91 |    .6498267    .1274568     -2.20    0.028      .4424286     .9544472
     ip59c92 |    .6197023    .1106072     -2.68    0.007       .436774     .8792438
     ip59c93 |    .6110953    .1080176     -2.79    0.005      .4321654     .8641077
     ip59c94 |    .6842546    .1270561     -2.04    0.041      .4755126     .9846308
     ip59c95 |    .6799511    .1143025     -2.29    0.022      .4890883     .9452966
     ip59c96 |    .5811885    .0884119     -3.57    0.000      .4313502     .7830762
     ip59c97 |    .6682071    .1205945     -2.23    0.025      .4691273     .9517687
     ip59c98 |    .7471159    .1121852     -1.94    0.052      .5566388     1.002773
     ip59c99 |    .5897174     .104671     -2.98    0.003      .4164484     .8350772
     ip60c80 |    1.192707     .214071      0.98    0.326      .8389906     1.695548
     ip60c81 |    1.105738    .2777614      0.40    0.689      .6758194     1.809148
     ip60c82 |    1.250685    .2401468      1.16    0.244      .8584342     1.822171
     ip60c83 |    1.176141    .1833561      1.04    0.298      .8664835     1.596462
     ip60c84 |    1.126445    .1744936      0.77    0.442      .8314832     1.526042
     ip60c85 |    1.312806    .2562679      1.39    0.163      .8954482     1.924688
     ip60c86 |    1.118162    .2270549      0.55    0.582      .7510335     1.664756
     ip60c87 |    .9856395    .1713453     -0.08    0.934      .7010415     1.385774
     ip60c88 |    1.093314     .254369      0.38    0.701      .6929561     1.724981
     ip60c89 |    1.064325     .179374      0.37    0.711      .7649246     1.480914
     ip60c90 |    1.043618    .1858188      0.24    0.810      .7361785      1.47945
     ip60c91 |    1.188565    .2828291      0.73    0.468      .7455426     1.894844
     ip60c92 |    1.213413    .2630479      0.89    0.372      .7933821     1.855817
     ip60c93 |    1.217555    .3401473      0.70    0.481      .7041885     2.105174
     ip60c94 |    1.263109    .3720778      0.79    0.428      .7090878     2.249997
     ip60c95 |    1.308664     .277965      1.27    0.205       .863038     1.984388
     ip60c96 |     1.40244    .4290677      1.11    0.269      .7699532     2.554489
     ip60c97 |    1.240345    .3579818      0.75    0.455      .7044874     2.183795
     ip60c98 |    1.392599    .4137315      1.11    0.265      .7779293     2.492942
     ip60c99 |    1.365646     .340472      1.25    0.211      .8377673     2.226143
     ip61c80 |    1.463788    .3756358      1.48    0.138      .8852044     2.420542
     ip61c81 |    1.385223     .345552      1.31    0.191      .8495372     2.258691
     ip61c82 |    1.430708    .3506555      1.46    0.144      .8849688     2.312991
     ip61c83 |    1.492733    .3602295      1.66    0.097      .9301826     2.395498
     ip61c84 |    1.542353    .4058541      1.65    0.100       .920871     2.583262
     ip61c85 |    1.542353    .3782725      1.77    0.077      .9537196     2.494288
     ip61c86 |    1.629187    .4052402      1.96    0.050      1.000565     2.652753
     ip61c87 |    1.327333    .3012168      1.25    0.212      .8507724     2.070839
     ip61c88 |    1.414168    .3358493      1.46    0.145      .8878712     2.252433
     ip61c89 |    1.447248    .3361339      1.59    0.111       .918005     2.281606
     ip61c90 |    1.314928    .2940048      1.22    0.221      .8483631     2.038084
     ip61c91 |    1.426573     .328865      1.54    0.123       .907963     2.241402
     ip61c92 |    1.319063    .3172534      1.15    0.250      .8232646     2.113448
     ip61c93 |    1.467923    .3258564      1.73    0.084      .9500566     2.268072
     ip61c94 |    1.302523    .3109169      1.11    0.268      .8158316     2.079554
     ip61c95 |    1.372818    .3339236      1.30    0.193      .8522501     2.211357
     ip61c96 |    1.253595    .2777623      1.02    0.308       .811997     1.935353
     ip61c97 |    1.308853    .2890197      1.22    0.223      .8490427     2.017681
     ip61c98 |    1.287318    .2769799      1.17    0.240      .8443862     1.962596
     ip61c99 |    1.203389    .2603068      0.86    0.392      .7875556     1.838784
     ip62c80 |    1.443113    .4239525      1.25    0.212      .8114043      2.56663
     ip62c81 |    1.236363    .3814249      0.69    0.492       .675376     2.263323
     ip62c82 |    1.484463    .4715127      1.24    0.214       .796527     2.766547
     ip62c83 |    1.273578    .3702774      0.83    0.406      .7203591     2.251656
     ip62c84 |    1.463788     .435113      1.28    0.200      .8174425     2.621193
     ip62c85 |    1.323198    .4308532      0.86    0.390      .6989735     2.504891
     ip62c86 |    1.252903    .3634285      0.78    0.437      .7095944     2.212202
     ip62c87 |    1.236363    .3800018      0.69    0.490      .6769013     2.258222
     ip62c88 |    1.120583     .371758      0.34    0.731      .5848635     2.147008
     ip62c89 |    1.145393    .3607372      0.43    0.666      .6178341     2.123427
     ip62c90 |    1.046153    .3267452      0.14    0.885      .5672043     1.929529
     ip62c91 |    1.190878    .3926228      0.53    0.596      .6240697     2.272488
     ip62c92 |    .9882635    .3095457     -0.04    0.970      .5348818     1.825945
     ip62c93 |    1.203283    .4397906      0.51    0.613      .5878416     2.463062
     ip62c94 |    1.033748    .3405912      0.10    0.920      .5419606     1.971796
     ip62c95 |    1.017208    .3858148      0.04    0.964      .4836816     2.139244
     ip62c96 |    1.027472    .3319833      0.08    0.933      .5454324     1.935526
     ip62c97 |    .9360787    .3202361     -0.19    0.847      .4787546     1.830255
     ip62c98 |    .9902449    .3311303     -0.03    0.977      .5141707      1.90712
     ip62c99 |    .9610681     .311729     -0.12    0.903      .5089336     1.814877
     ip63c80 |    1.658062    .4750725      1.76    0.078      .9456101     2.907297
     ip63c81 |     1.50133    .4252775      1.43    0.151       .861705     2.615734
     ip63c82 |    1.443586    .3832499      1.38    0.167      .8579497     2.428978
     ip63c83 |    1.550824    .4393289      1.55    0.121      .8900776     2.702074
     ip63c84 |    1.493081    .3860786      1.55    0.121      .8994579     2.478482
     ip63c85 |    1.616817    .4463033      1.74    0.082      .9412317     2.777314
     ip63c86 |    1.262107    .4015309      0.73    0.464      .6765377     2.354508
     ip63c87 |    1.389967    .4094422      1.12    0.264      .7803087     2.475955
     ip63c88 |    1.270356    .3903455      0.78    0.436       .695624     2.319937
     ip63c89 |    1.171367    .3181893      0.58    0.560      .6878176     1.994862
     ip63c90 |    1.187865    .3486829      0.59    0.558      .6682019     2.111673
     ip63c91 |    1.311601    .3999034      0.89    0.374      .7215609     2.384134
     ip63c92 |    1.422964    .4669606      1.07    0.282      .7479335     2.707227
     ip63c93 |    1.130122    .3614558      0.38    0.702        .60378     2.115299
     ip63c94 |    1.233235     .420959      0.61    0.539      .6316729     2.407684
     ip63c95 |    1.121873    .3695162      0.35    0.727      .5882739     2.139477
     ip63c96 |    1.329701    .4105747      0.92    0.356      .7259833     2.435462
     ip63c97 |    1.264222    .4064505      0.73    0.466      .6732246     2.374033
     ip63c98 |    1.275837    .3883507      0.80    0.424      .7025853     2.316816
     ip63c99 |    1.310978    .4249154      0.84    0.403      .6945499     2.474501
     ip64c80 |    1.860951    .4078646      2.83    0.005      1.211092     2.859517
     ip64c81 |    1.725753    .3502306      2.69    0.007      1.159399     2.568767
     ip64c82 |    1.678037    .3629258      2.39    0.017      1.098256      2.56389
     ip64c83 |     1.97229    .4550183      2.94    0.003      1.254855       3.0999
     ip64c84 |    1.789376    .4048007      2.57    0.010      1.148521     2.787816
     ip64c85 |    1.809258    .3947228      2.72    0.007      1.179764     2.774634
     ip64c86 |    1.546816    .3403596      1.98    0.047      1.004942     2.380872
     ip64c87 |    1.534887    .3283473      2.00    0.045      1.009218      2.33436
     ip64c88 |    1.328114    .3025012      1.25    0.213      .8498837     2.075446
     ip64c89 |    1.192917    .2905827      0.72    0.469      .7400585      1.92289
     ip64c90 |    1.463312    .3338356      1.67    0.095      .9357206     2.288376
     ip64c91 |    1.411619    .3171679      1.53    0.125      .9087954     2.192646
     ip64c92 |    1.192917    .2646898      0.80    0.427      .7722214     1.842802
     ip64c93 |    1.041814    .2456557      0.17    0.862      .6562666     1.653866
     ip64c94 |    1.204846    .2600985      0.86    0.388      .7891814     1.839443
     ip64c95 |    1.204846     .270508      0.83    0.407      .7759303     1.870857
     ip64c96 |     1.19593    .2582025      0.83    0.407      .7833042     1.825917
     ip64c97 |    1.182896    .2567975      0.77    0.439      .7729605     1.810238
     ip64c98 |    1.119002    .2319725      0.54    0.588      .7453737     1.679916
     ip64c99 |    1.197036    .2306741      0.93    0.351      .8204973     1.746375
     ip65c80 |     2.24666    .5526469      3.29    0.001      1.387247     3.638489
     ip65c81 |    2.226779    .5228779      3.41    0.001      1.405411      3.52818
     ip65c82 |    2.135322    .5035096      3.22    0.001      1.345085     3.389822
     ip65c83 |    2.055794    .4866467      3.04    0.002      1.292657     3.269457
     ip65c84 |    2.012053    .4939718      2.85    0.004      1.243553     3.255479
     ip65c85 |    2.023983    .4992092      2.86    0.004      1.248132      3.28211
     ip65c86 |    1.884809    .4895315      2.44    0.015      1.132894     3.135779
     ip65c87 |    1.912644    .4822237      2.57    0.010      1.166878     3.135036
     ip65c88 |    1.670084    .4054771      2.11    0.035      1.037711      2.68782
     ip65c89 |    1.868903    .4985808      2.34    0.019      1.107913     3.152594
     ip65c90 |    1.968313    .4808218      2.77    0.006      1.219444     3.177069
     ip65c91 |    1.646226    .4248213      1.93    0.053      .9927277     2.729911
     ip65c92 |    1.765517    .4504949      2.23    0.026      1.070722     2.911168
     ip65c93 |    1.697919    .3998086      2.25    0.025      1.070248     2.693699
     ip65c94 |    1.570674    .4018155      1.76    0.078      .9513244     2.593245
     ip65c95 |    1.650202    .3912646      2.11    0.035      1.036851     2.626382
     ip65c96 |    1.558912    .3871274      1.79    0.074      .9581668     2.536308
     ip65c97 |    1.573212    .3477202      2.05    0.040      1.020117     2.426189
     ip65c98 |     1.53962    .3644755      1.82    0.068      .9680722     2.448607
     ip65c99 |    1.615802    .3932225      1.97    0.049      1.002857     2.603377
     ip56c00 |    1.308984    .4348789      0.81    0.418       .682563     2.510302
     ip56c01 |    1.220354    .3902074      0.62    0.533      .6521004     2.283794
     ip56c02 |    1.331552    .3606727      1.06    0.290      .7830625     2.264228
     ip56c03 |    1.210146    .4057204      0.57    0.569      .6272769     2.334621
     ip56c04 |    1.253984    .4183703      0.68    0.498      .6520831     2.411464
     ip57c00 |    .6484131    .1960474     -1.43    0.152      .3585018     1.172768
     ip57c01 |     .552538    .1834655     -1.79    0.074      .2882225     1.059245
     ip57c02 |    .6017194    .2227598     -1.37    0.170      .2912558     1.243121
     ip57c03 |    .7031506    .2454388     -1.01    0.313      .3547574     1.393687
     ip57c04 |    .6039734    .2061015     -1.48    0.140      .3094223     1.178919
     ip58c00 |    .9598269     .163454     -0.24    0.810       .687444     1.340135
     ip58c01 |    1.154133    .1681597      0.98    0.325       .867429     1.535599
     ip58c02 |    .8931232    .1378127     -0.73    0.464      .6600357     1.208524
     ip58c03 |    1.030813    .1501408      0.21    0.835      .7748186     1.371386
     ip58c04 |    1.083111    .1784106      0.48    0.628      .7842647     1.495834
     ip59c00 |    .4825304    .0755873     -4.65    0.000      .3549653     .6559392
     ip59c01 |    .6025896    .0847202     -3.60    0.000      .4574548     .7937708
     ip59c02 |    .5641354    .0902625     -3.58    0.000      .4122777     .7719282
     ip59c03 |     .608913     .106748     -2.83    0.005       .431849     .8585757
     ip59c04 |    .5862986    .1057133     -2.96    0.003      .4117578     .8348258
     ip60c00 |    1.036737    .3690486      0.10    0.919      .5160187     2.082917
     ip60c01 |    1.085533     .391428      0.23    0.820      .5354408     2.200768
     ip60c02 |     1.12664    .4221477      0.32    0.750      .5405592     2.348157
     ip60c03 |     1.11921    .4643945      0.27    0.786      .4962742     2.524068
     ip60c04 |    1.147774    .3994378      0.40    0.692      .5802684     2.270303
     ip61c00 |    1.281098    .2372965      1.34    0.181      .8910765      1.84183
     ip61c01 |    1.211657    .2054555      1.13    0.258      .8690509      1.68933
     ip61c02 |    1.247072    .2320983      1.19    0.235      .8659058     1.796026
     ip61c03 |     1.39054    .2483813      1.85    0.065      .9798058     1.973454
     ip61c04 |    1.370908    .3124695      1.38    0.166      .8769907     2.142998
     ip62c00 |    .8975133    .2335813     -0.42    0.678      .5389052     1.494753
     ip62c01 |    1.032828    .3195243      0.10    0.917      .5632399     1.893926
     ip62c02 |    .9379996    .2906617     -0.21    0.836      .5110195     1.721741
     ip62c03 |    .9306197    .2926603     -0.23    0.819      .5024436     1.723682
     ip62c04 |    1.063882    .3384281      0.19    0.846      .5703223      1.98457
     ip63c00 |    1.196434    .3164574      0.68    0.498      .7124355     2.009241
     ip63c01 |    1.292549    .3426965      0.97    0.333      .7687157     2.173342
     ip63c02 |    1.272749    .3130099      0.98    0.327      .7859678     2.061012
     ip63c03 |    1.326254    .3542402      1.06    0.290      .7857277     2.238624
     ip63c04 |     1.30708    .3637334      0.96    0.336      .7575836     2.255143
     ip64c00 |    1.078494    .1841122      0.44    0.658       .771804     1.507052
     ip64c01 |    1.068478    .1792465      0.39    0.693       .769076     1.484438
     ip64c02 |    1.125793    .1963987      0.68    0.497      .7997662     1.584724
     ip64c03 |    1.142833     .187524      0.81    0.416      .8285362     1.576354
     ip64c04 |    1.170099    .1976408      0.93    0.352      .8403236     1.629291
     ip65c00 |    1.420295    .2907337      1.71    0.087      .9509068     2.121383
     ip65c01 |    1.408941    .2559034      1.89    0.059      .9869396     2.011384
     ip65c02 |    1.349304    .2163633      1.87    0.062      .9854128     1.847572
     ip65c03 |    1.414343    .2045935      2.40    0.017       1.06518      1.87796
     ip65c04 |    1.365429    .2378731      1.79    0.074       .970466     1.921136
       d1c95 |    1.085392    .0757346      1.17    0.240      .9466573     1.244458
       d1c00 |    1.096336    .1438272      0.70    0.483      .8477644      1.41779
       d2c95 |    .9966162    .0710885     -0.05    0.962      .8665863     1.146157
       d2c00 |    1.171932    .1821616      1.02    0.307      .8641599     1.589317
-------------+----------------------------------------------------------------
Wald chi2(254) =  1.5e+16                                Prob > chi2 =   0.0000

.  * Column 3: Volume fixed effects, no age profile;
. xtpqml cit ip* d1c* d2c*, i(volume) irr fe cluster(journal);
warning: existing panel variable is not volume
note: 22 groups (572 obs) dropped because of all zero outcomes

Iteration 0:   log likelihood = -16695.577
Iteration 1:   log likelihood = -16088.411
Iteration 2:   log likelihood = -16084.519
Iteration 3:   log likelihood = -16084.518

Conditional fixed-effects Poisson regression    Number of obs     =      8,372
Group variable: volume                          Number of groups  =        322

                                                Obs per group:
                                                              min =         26
                                                              avg =       26.0
                                                              max =         26

                                                Wald chi2(254)    =    1237.39
Log likelihood  = -16084.518                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip56c80 |    -.003757    .0934547     -0.04    0.968     -.1869247     .1794108
     ip56c81 |   -.1719528    .0974688     -1.76    0.078     -.3629882     .0190825
     ip56c82 |    -.086593    .0953684     -0.91    0.364     -.2735115     .1003256
     ip56c83 |    -.086593    .0953684     -0.91    0.364     -.2735115     .1003256
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     ip61c02 |   -.0242652    .0753909     -0.32    0.748     -.1720286     .1234982
     ip61c03 |    .0841341    .0733883      1.15    0.252     -.0597043     .2279725
     ip61c04 |    .0770947    .0735281      1.05    0.294     -.0670177     .2212071
     ip62c00 |   -.0046826    .0906202     -0.05    0.959     -.1822949     .1729298
     ip62c01 |    .1608888    .0871748      1.85    0.065     -.0099707     .3317482
     ip62c02 |    .0526856    .0885963      0.59    0.552       -.12096     .2263313
     ip62c03 |     .044787     .088763      0.50    0.614     -.1291853     .2187594
     ip62c04 |    .1862207    .0858745      2.17    0.030      .0179097     .3545316
     ip63c00 |    .0371824    .0794045      0.47    0.640     -.1184475     .1928123
     ip63c01 |    .1432212    .0777387      1.84    0.065     -.0091439     .2955862
     ip63c02 |    .0967252    .0768431      1.26    0.208     -.0538845     .2473348
     ip63c03 |    .1376698    .0760961      1.81    0.070     -.0114757     .2868153
     ip63c04 |    .1305883    .0762456      1.71    0.087     -.0188504      .280027
     ip64c00 |   -.0047958    .0812835     -0.06    0.953     -.1641085     .1545169
     ip64c01 |    .0143825    .0810814      0.18    0.859     -.1445341     .1732991
     ip64c02 |    .0512456    .0792709      0.65    0.518     -.1041225     .2066136
     ip64c03 |    .0661837    .0789779      0.84    0.402     -.0886101     .2209775
     ip64c04 |    .0967799    .0784177      1.23    0.217     -.0569161     .2504758
     ip65c00 |    .0212127    .0713613      0.30    0.766     -.1186529     .1610784
     ip65c01 |    .0430133    .0711653      0.60    0.546     -.0964682     .1824948
     ip65c02 |   -.0197193    .0710342     -0.28    0.781     -.1589439     .1195052
     ip65c03 |    .0272382    .0701995      0.39    0.698     -.1103502     .1648266
     ip65c04 |   -.0017702    .0707137     -0.03    0.980     -.1403666     .1368262
       d1c95 |    .0949141    .0322685      2.94    0.003      .0316691     .1581591
       d1c00 |   -.0268248    .0441435     -0.61    0.543     -.1133444     .0596948
       d2c95 |   -.0069025    .0247255     -0.28    0.780     -.0553636     .0415586
       d2c00 |    .1160237    .0292236      3.97    0.000      .0587465     .1733008
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     ip56c80 |    .9962501    .2057014     -0.02    0.985      .6646851      1.49321
     ip56c81 |    .8420189    .1730297     -0.84    0.403      .5628662     1.259617
     ip56c82 |    .9170503    .2032813     -0.39    0.696      .5938933     1.416048
     ip56c83 |    .9170503    .2133137     -0.37    0.710      .5812948     1.446738
     ip56c84 |    .8920398    .1962691     -0.52    0.604      .5795628     1.372992
     ip56c85 |    .8878714    .2318834     -0.46    0.649      .5321618     1.481346
     ip56c86 |    .9295555    .2412505     -0.28    0.778      .5589337     1.545932
     ip56c87 |    .8795346    .2318523     -0.49    0.626      .5246497     1.474472
     ip56c88 |    .8461873     .198827     -0.71    0.477      .5339017     1.341132
     ip56c89 |    .9003766    .2271608     -0.42    0.677      .5491235     1.476313
     ip56c90 |    .9295555    .1891256     -0.36    0.720      .6238663      1.38503
     ip56c91 |    .8295137    .1701294     -0.91    0.362      .5549401     1.239941
     ip56c92 |    .9212187    .1775497     -0.43    0.670      .6314045     1.344057
     ip56c93 |    1.058776    .1540537      0.39    0.695       .796073     1.408171
     ip56c94 |    1.008755     .197442      0.04    0.964      .6873557     1.480438
     ip56c95 |    .9837448    .1273508     -0.13    0.899      .7632908      1.26787
     ip56c96 |     1.09541    .1556103      0.64    0.521      .8291972      1.44709
     ip56c97 |    1.239785    .1471813      1.81    0.070      .9824174     1.564577
     ip56c98 |    1.078557    .1211129      0.67    0.501      .8654862     1.344082
     ip56c99 |     1.08125    .1027943      0.82    0.411      .8974336     1.302715
     ip57c80 |    1.455354    .2754211      1.98    0.047      1.004342     2.108899
     ip57c81 |     1.33758    .3539281      1.10    0.272      .7963225     2.246728
     ip57c82 |    1.379642    .3891958      1.14    0.254       .793676     2.398223
     ip57c83 |    1.413292    .3472425      1.41    0.159      .8731597     2.287547
     ip57c84 |    1.430117      .31529      1.62    0.105      .9283501     2.203085
     ip57c85 |    1.489004    .3276979      1.81    0.070      .9673076     2.292066
     ip57c86 |     1.33758    .2717929      1.43    0.152      .8981682     1.991965
     ip57c87 |    1.219806     .326539      0.74    0.458      .7218152     2.061366
     ip57c88 |    1.194568    .2255716      0.94    0.346       .825045     1.729594
     ip57c89 |    1.118856     .231819      0.54    0.588      .7454378     1.679334
     ip57c90 |    1.219806    .3204967      0.76    0.450      .7288572      2.04145
     ip57c91 |    1.194568    .1976331      1.07    0.283      .8637449       1.6521
     ip57c92 |    1.362817     .215828      1.95    0.051      .9991569     1.858838
     ip57c93 |    1.194568    .2304478      0.92    0.357      .8184705     1.743488
     ip57c94 |    1.102031    .1858165      0.58    0.564      .7919003     1.533618
     ip57c95 |     1.40488    .2617713      1.82    0.068      .9750673     2.024154
     ip57c96 |    1.105607    .1691632      0.66    0.512      .8191485      1.49224
     ip57c97 |    1.292933    .1397246      2.38    0.017      1.046137     1.597952
     ip57c98 |    1.304811    .1522837      2.28    0.023      1.038017     1.640178
     ip57c99 |    1.112374    .1443359      0.82    0.412       .862588     1.434493
     ip58c80 |     1.10655    .2169566      0.52    0.606      .7534933     1.625034
     ip58c81 |    1.162075    .2217643      0.79    0.431      .7994579     1.689169
     ip58c82 |    1.066888    .2042813      0.34    0.735      .7330543     1.552751
     ip58c83 |    1.130346     .228099      0.61    0.544      .7611019     1.678728
     ip58c84 |    1.158109    .2147016      0.79    0.428      .8052774     1.665534
     ip58c85 |    1.086719    .2212711      0.41    0.683       .729123     1.619697
     ip58c86 |    1.241398    .2201987      1.22    0.223      .8768499     1.757506
     ip58c87 |    1.082753    .1900578      0.45    0.651      .7675669     1.527364
     ip58c88 |     1.12638    .1826337      0.73    0.463      .8197273      1.54775
     ip58c89 |    .8011579     .139637     -1.27    0.203      .5693232     1.127398
     ip58c90 |    .9756675    .1520334     -0.16    0.874      .7188915     1.324159
     ip58c91 |    .9360062    .1536063     -0.40    0.687      .6785621     1.291124
     ip58c92 |    1.074821    .1707731      0.45    0.650      .7872137     1.467504
     ip58c93 |    1.015329    .1753442      0.09    0.930      .7237803     1.424317
     ip58c94 |    1.162075    .2017136      0.87    0.387       .826956        1.633
     ip58c95 |    1.039126    .1817821      0.22    0.826      .7374981     1.464115
     ip58c96 |    .8978627    .1308989     -0.74    0.460      .6747048      1.19483
     ip58c97 |    1.059068    .1544365      0.39    0.694      .7957911     1.409447
     ip58c98 |    .9806484    .1157981     -0.17    0.869      .7780379     1.236021
     ip58c99 |    .8794589    .1227999     -0.92    0.358         .6689     1.156298
     ip59c80 |    1.630404    .3659728      2.18    0.029      1.050094      2.53141
     ip59c81 |    1.566882    .3676837      1.91    0.056      .9892217     2.481868
     ip59c82 |    1.242212    .2882538      0.93    0.350      .7882711     1.957564
     ip59c83 |    1.418663    .3193732      1.55    0.120      .9125454     2.205484
     ip59c84 |    1.517475    .2921077      2.17    0.030      1.040564     2.212964
     ip59c85 |    1.348083    .2881472      1.40    0.162      .8866979     2.049545
     ip59c86 |    1.362199    .2936649      1.43    0.152       .892765      2.07847
     ip59c87 |     1.10811     .230049      0.49    0.621      .7376821     1.664548
     ip59c88 |    1.221038    .2790827      0.87    0.382      .7801482     1.911091
     ip59c89 |    1.079878    .2488215      0.33    0.739      .6874543      1.69631
     ip59c90 |    1.023414    .2008452      0.12    0.906      .6966308     1.503487
     ip59c91 |    1.065762    .2059263      0.33    0.742      .7297785     1.556428
     ip59c92 |    1.016356    .1968464      0.08    0.933      .6953221     1.485612
     ip59c93 |     1.00224    .1530687      0.01    0.988      .7429684     1.351988
     ip59c94 |    1.122226    .2099023      0.62    0.538      .7778048     1.619161
     ip59c95 |    1.115168    .1297434      0.94    0.349      .8877851     1.400789
     ip59c96 |    .9486673    .1383656     -0.36    0.718      .7127939     1.262594
     ip59c97 |    1.097712    .1407096      0.73    0.467      .8538425     1.411235
     ip59c98 |    1.227106    .1833198      1.37    0.171      .9156291     1.644542
     ip59c99 |    .9752136    .1849529     -0.13    0.895      .6724596     1.414273
     ip60c80 |    1.123345    .3818205      0.34    0.732      .5770232     2.186922
     ip60c81 |    1.041435    .3805871      0.11    0.912      .5088205     2.131569
     ip60c82 |    1.177952    .4115219      0.47    0.639      .5939602     2.336135
     ip60c83 |    1.107743    .3188695      0.36    0.722        .63011      1.94743
     ip60c84 |    1.060937    .3790645      0.17    0.869      .5266984     2.137063
     ip60c85 |     1.23646    .4182923      0.63    0.530      .6371182     2.399607
     ip60c86 |    1.053136    .3320998      0.16    0.870      .5676276     1.953914
     ip60c87 |      .92832    .3163634     -0.22    0.827      .4760095     1.810422
     ip60c88 |    1.029733    .3210441      0.09    0.925      .5589103     1.897174
     ip60c89 |     1.00243    .2885583      0.01    0.993      .5702009       1.7623
     ip60c90 |    .9829271    .2409223     -0.07    0.944      .6079752      1.58912
     ip60c91 |    1.119445    .2246251      0.56    0.574      .7554445     1.658833
     ip60c92 |    1.142848    .1827058      0.84    0.404      .8354255     1.563396
     ip60c93 |    1.146748    .1441228      1.09    0.276      .8963744     1.467056
     ip60c94 |    1.189654     .133491      1.55    0.122      .9547888     1.482292
     ip60c95 |    1.232559    .1886454      1.37    0.172      .9131244     1.663741
     ip60c96 |    1.324586     .139503      2.67    0.008      1.077539     1.628273
     ip60c97 |     1.16944     .133431      1.37    0.170      .9350989     1.462509
     ip60c98 |    1.315026    .1389676      2.59    0.010      1.069011     1.617658
     ip60c99 |    1.296674     .186524      1.81    0.071      .9781092     1.718995
     ip61c80 |    1.110315    .2888615      0.40    0.688      .6668007     1.848827
     ip61c81 |    1.050722    .2670188      0.19    0.846      .6385174      1.72903
     ip61c82 |    1.085223    .2451229      0.36    0.717      .6970361     1.689595
     ip61c83 |     1.13227    .2534499      0.55    0.579      .7301553      1.75584
     ip61c84 |    1.169908    .2924769      0.63    0.530      .7167232     1.909642
     ip61c85 |    1.169908    .2497258      0.74    0.462      .7699389     1.777654
     ip61c86 |    1.235774    .2652968      0.99    0.324      .8113395     1.882243
     ip61c87 |    1.006811    .2039794      0.03    0.973      .6768538     1.497618
     ip61c88 |    1.072677    .2318481      0.32    0.745      .7022481     1.638504
     ip61c89 |    1.097769    .2108124      0.49    0.627      .7534399     1.599459
     ip61c90 |    .9974015    .1842259     -0.01    0.989      .6944614     1.432491
     ip61c91 |    1.082087    .2053429      0.42    0.678      .7459902     1.569607
     ip61c92 |    1.000538     .169374      0.00    0.997      .7180252     1.394208
     ip61c93 |    1.113451    .1594625      0.75    0.453      .8409433     1.474266
     ip61c94 |     .987992    .1928802     -0.06    0.951       .673873     1.448534
     ip61c95 |    1.041312    .1630837      0.26    0.796      .7660748     1.415438
     ip61c96 |    .9331596    .1539412     -0.42    0.675      .6753598     1.289367
     ip61c97 |    .9954006    .1415514     -0.03    0.974       .753273     1.315356
     ip61c98 |    .9802841    .1466235     -0.13    0.894      .7311991     1.314221
     ip61c99 |    .9119561    .1191137     -0.71    0.480      .7059853     1.178019
     ip62c80 |    1.567762    .3699534      1.91    0.057      .9872282     2.489676
     ip62c81 |    1.343155    .2478078      1.60    0.110      .9355822      1.92828
     ip62c82 |    1.612684    .3256141      2.37    0.018      1.085637     2.395597
     ip62c83 |    1.383584    .3317411      1.35    0.176      .8647955     2.213592
     ip62c84 |    1.590223    .3541464      2.08    0.037      1.027764     2.460496
     ip62c85 |     1.43749    .3148743      1.66    0.098      .9357368     2.208288
     ip62c86 |    1.361123    .2937698      1.43    0.153      .8916275     2.077837
     ip62c87 |    1.343155    .3079373      1.29    0.198      .8569902     2.105116
     ip62c88 |    1.217374    .2402338      1.00    0.319      .8268941     1.792249
     ip62c89 |    1.244327    .2102963      1.29    0.196       .893466      1.73297
     ip62c90 |    1.136515    .2230883      0.65    0.514      .7735558     1.669779
     ip62c91 |    1.293741    .1994703      1.67    0.095      .9563308     1.750195
     ip62c92 |    1.073625    .1966016      0.39    0.698      .7498616     1.537178
     ip62c93 |    1.307217    .1914065      1.83    0.067       .981098     1.741739
     ip62c94 |    1.123039    .1949393      0.67    0.504      .7991743     1.578149
     ip62c95 |     1.10507    .2000758      0.55    0.581      .7749571     1.575804
     ip62c96 |     1.10791    .1797233      0.63    0.528      .8061652     1.522597
     ip62c97 |    1.018757    .1419879      0.13    0.894      .7752385     1.338769
     ip62c98 |    1.078717    .1454568      0.56    0.574      .8281891      1.40503
     ip62c99 |    1.036397    .1266764      0.29    0.770       .815616     1.316942
     ip63c80 |     1.38752     .291785      1.56    0.119      .9188361     2.095273
     ip63c81 |    1.256361    .2927741      0.98    0.327      .7957126     1.983686
     ip63c82 |     1.20804    .2635025      0.87    0.386       .787796      1.85246
     ip63c83 |     1.29778    .2725198      1.24    0.215      .8599198     1.958593
     ip63c84 |    1.249458    .2685307      1.04    0.300      .8199428      1.90397
     ip63c85 |    1.353005    .2920988      1.40    0.161      .8862051     2.065686
     ip63c86 |    1.056172    .1850275      0.31    0.755      .7492302     1.488861
     ip63c87 |     1.16317    .2066011      0.85    0.395      .8212087     1.647528
     ip63c88 |    1.063075    .1926252      0.34    0.736      .7452971     1.516346
     ip63c89 |    .9802381    .1756254     -0.11    0.911       .689962     1.392637
     ip63c90 |    .9940442    .1951559     -0.03    0.976      .6765399     1.460555
     ip63c91 |    1.097591    .2276541      0.45    0.653      .7309546     1.648126
     ip63c92 |    1.190782    .2444187      0.85    0.395      .7963713     1.780529
     ip63c93 |    .9457226    .1443694     -0.37    0.715      .7011703     1.275569
     ip63c94 |    1.032011    .1801591      0.18    0.857      .7329755     1.453046
     ip63c95 |    .9388196    .1610427     -0.37    0.713      .6707631     1.313999
     ip63c96 |    1.112913    .1934702      0.62    0.538      .7915663     1.564715
     ip63c97 |     1.05925    .1806701      0.34    0.736      .7582525     1.479731
     ip63c98 |    1.069293    .1550918      0.46    0.644       .804706     1.420876
     ip63c99 |    1.095107    .1293863      0.77    0.442      .8687354     1.380465
     ip64c80 |    1.677962    .2793187      3.11    0.002      1.210845     2.325283
     ip64c81 |    1.556059    .2577474      2.67    0.008      1.124688     2.152881
     ip64c82 |    1.513034    .2212335      2.83    0.005      1.136024     2.015163
     ip64c83 |    1.778354    .2848585      3.59    0.000      1.299188     2.434247
     ip64c84 |    1.613425     .248563      3.11    0.002      1.192926     2.182148
     ip64c85 |    1.631352    .2760791      2.89    0.004      1.170836        2.273
     ip64c86 |    1.394717    .2254895      2.06    0.040      1.015942     1.914711
     ip64c87 |     1.38396    .2411764      1.86    0.062      .9835325     1.947415
     ip64c88 |     1.19752    .1690178      1.28    0.202      .9081224     1.579142
     ip64c89 |    1.075617    .1721605      0.46    0.649       .785989     1.471969
     ip64c90 |    1.319423    .1916105      1.91    0.056      .9925907     1.753873
     ip64c91 |    1.272813    .1838085      1.67    0.095       .959051     1.689226
     ip64c92 |    1.075617    .1555931      0.50    0.614      .8100788     1.428197
     ip64c93 |    .9393721    .1246637     -0.47    0.637      .7242275     1.218429
     ip64c94 |    1.086373    .1562717      0.58    0.565      .8194757     1.440197
     ip64c95 |    1.086373    .1763228      0.51    0.610       .790361      1.49325
     ip64c96 |    1.075494    .1431214      0.55    0.584        .82858     1.395988
     ip64c97 |    1.068067    .1207546      0.58    0.560      .8557809     1.333013
     ip64c98 |     1.01007    .1200813      0.08    0.933      .8001239     1.275105
     ip64c99 |    1.070687    .1414279      0.52    0.605       .826469      1.38707
     ip65c80 |    1.569892    .2456245      2.88    0.004      1.155291     2.133282
     ip65c81 |    1.555999    .2153777      3.19    0.001      1.186282     2.040942
     ip65c82 |    1.492092    .2092702      2.85    0.004      1.133476      1.96417
     ip65c83 |    1.436521    .2337114      2.23    0.026      1.044306     1.976042
     ip65c84 |    1.405956    .2064328      2.32    0.020      1.054368     1.874785
     ip65c85 |    1.414292    .2172576      2.26    0.024      1.046601      1.91116
     ip65c86 |    1.317042    .2189619      1.66    0.098      .9507909     1.824376
     ip65c87 |    1.336492    .1809609      2.14    0.032      1.024976     1.742685
     ip65c88 |    1.166999    .1749056      1.03    0.303      .8699528     1.565473
     ip65c89 |    1.305928    .2460348      1.42    0.157      .9027222     1.889227
     ip65c90 |    1.375392    .2025536      2.16    0.030      1.030553      1.83562
     ip65c91 |    1.150328    .1724193      0.93    0.350      .8575068     1.543142
     ip65c92 |    1.233685    .2050438      1.26    0.206       .890699     1.708747
     ip65c93 |    1.186449    .1682773      1.21    0.228       .898506      1.56667
     ip65c94 |    1.097535    .1673895      0.61    0.542       .813951     1.479921
     ip65c95 |    1.153107    .1640655      1.00    0.317      .8724878     1.523981
     ip65c96 |     1.09173    .1582682      0.61    0.545      .8217062     1.450488
     ip65c97 |    1.100455    .1560516      0.68    0.500      .8334247     1.453042
     ip65c98 |    1.067533    .1429146      0.49    0.625      .8211597     1.387825
     ip65c99 |     1.12635    .1231531      1.09    0.277       .909085      1.39554
     ip56c00 |    1.222077    .0909961      2.69    0.007      1.056132     1.414097
     ip56c01 |    1.165486    .0638671      2.79    0.005      1.046797     1.297633
     ip56c02 |    1.266471    .0840835      3.56    0.000      1.111942     1.442474
     ip56c03 |    1.150998    .1089895      1.49    0.138      .9560338     1.385722
     ip56c04 |    1.196212    .1120936      1.91    0.056      .9955077     1.437381
     ip57c00 |    1.235869    .1822084      1.44    0.151      .9257137     1.649939
     ip57c01 |    1.079447    .0741731      1.11    0.266       .943435     1.235068
     ip57c02 |    1.161978    .1116819      1.56    0.118       .962467     1.402846
     ip57c03 |    1.357369    .1271721      3.26    0.001      1.129662     1.630974
     ip57c04 |    1.169586    .1337431      1.37    0.171      .9347524     1.463416
     ip58c00 |    .9202014    .1151537     -0.66    0.506       .720052     1.175985
     ip58c01 |    1.135037    .1047104      1.37    0.170      .9472932     1.359991
     ip58c02 |    .8602773    .0778572     -1.66    0.096      .7204481     1.027246
     ip58c03 |    .9929034    .0787392     -0.09    0.928      .8499728     1.159869
     ip58c04 |    1.051894    .0669402      0.80    0.427       .928546     1.191628
     ip59c00 |    .8254761    .0850045     -1.86    0.063       .674607     1.010086
     ip59c01 |     1.05777    .1373317      0.43    0.665      .8201227     1.364282
     ip59c02 |    .9642962     .123419     -0.28    0.776      .7503541     1.239238
     ip59c03 |    1.040798    .1410087      0.30    0.768      .7980764     1.357339
     ip59c04 |    1.011064    .0613632      0.18    0.856      .8976723     1.138779
     ip60c00 |    1.029209    .1112974      0.27    0.790      .8326368     1.272188
     ip60c01 |    1.105552    .1112699      1.00    0.319      .9076293     1.346634
     ip60c02 |    1.130847    .1031371      1.35    0.178      .9457392     1.352186
     ip60c03 |    1.123047    .1063666      1.23    0.220      .9327786     1.352127
     ip60c04 |    1.168303    .0750544      2.42    0.015      1.030083     1.325069
     ip61c00 |    .9853728     .097693     -0.15    0.882      .8113528     1.196717
     ip61c01 |    .9549222    .0778304     -0.57    0.571      .8139378     1.120327
     ip61c02 |    .9760268    .0513386     -0.46    0.645      .8804179     1.082018
     ip61c03 |    1.087775      .07199      1.27    0.204      .9554449     1.238432
     ip61c04 |    1.080144    .0671011      1.24    0.215      .9563199     1.220002
     ip62c00 |    .9953284    .1225793     -0.04    0.970      .7818744     1.267056
     ip62c01 |    1.174554     .081321      2.32    0.020      1.025509     1.345261
     ip62c02 |    1.054098    .0499512      1.11    0.266      .9606045     1.156691
     ip62c03 |    1.045805    .0587963      0.80    0.426      .9366888     1.167633
     ip62c04 |    1.204688    .0995455      2.25    0.024      1.024562     1.416482
     ip63c00 |    1.037882    .0997167      0.39    0.699        .85974     1.252937
     ip63c01 |    1.153985     .089772      1.84    0.066      .9907922     1.344057
     ip63c02 |    1.101558    .1050783      1.01    0.311      .9137144     1.328018
     ip63c03 |    1.147597    .1074036      1.47    0.141       .955268     1.378648
     ip63c04 |    1.139499    .0716233      2.08    0.038      1.007422     1.288891
     ip64c00 |    .9952157    .0871877     -0.05    0.956      .8381972     1.181648
     ip64c01 |    1.014486    .0834303      0.17    0.861      .8634641     1.191923
     ip64c02 |    1.052581    .0557016      0.97    0.333       .948879     1.167617
     ip64c03 |    1.068423    .0667536      1.06    0.289      .9452818     1.207606
     ip64c04 |    1.101618    .0598959      1.78    0.075      .9902627     1.225495
     ip65c00 |    1.021439    .0823839      0.26    0.793      .8720857     1.196371
     ip65c01 |    1.043952    .1029761      0.44    0.663      .8604336     1.266612
     ip65c02 |    .9804738    .0684846     -0.28    0.778      .8550291     1.124323
     ip65c03 |    1.027613    .0799889      0.35    0.726      .8822105     1.196979
     ip65c04 |    .9982314    .0696469     -0.03    0.980       .870648     1.144511
       d1c95 |    1.099564    .0564461      1.85    0.064      .9943157     1.215954
       d1c00 |    .9735318    .0836163     -0.31    0.755      .8226985     1.152019
       d2c95 |    .9931213    .0549491     -0.12    0.901      .8910572     1.106876
       d2c00 |    1.123022    .1373098      0.95    0.343      .8837178     1.427129
-------------+----------------------------------------------------------------
Wald chi2(254) =  7.4e+15                                Prob > chi2 =   0.0000

.  * Column 4: Volume fixed effects and age profile;
. xtpqml cit ip* ia1j* ia2j* d1c* d2c*, i(volume) irr fe cluster(journal);
note: 22 groups (572 obs) dropped because of all zero outcomes
note: ia1journal25 dropped because of collinearity
note: ia2journal25 dropped because of collinearity

Iteration 0:   log likelihood = -16695.577
Iteration 1:   log likelihood = -15340.539
Iteration 2:   log likelihood = -15323.119
Iteration 3:   log likelihood = -15321.065
Iteration 4:   log likelihood = -15320.727
Iteration 5:   log likelihood = -15320.721
Iteration 6:   log likelihood = -15320.721

Conditional fixed-effects Poisson regression    Number of obs     =      8,372
Group variable: volume                          Number of groups  =        322

                                                Obs per group:
                                                              min =         26
                                                              avg =       26.0
                                                              max =         26

                                                Wald chi2(328)    =    2688.83
Log likelihood  = -15320.721                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip56c80 |     .039872    .1119814      0.36    0.722     -.1796076     .2593515
     ip56c81 |    -.108085    .1157093     -0.93    0.350      -.334871      .118701
     ip56c82 |   -.0044258    .1142399     -0.04    0.969     -.2283319     .2194802
     ip56c83 |    .0119531    .1144494      0.10    0.917     -.2123636     .2362698
     ip56c84 |   -.0012222    .1151153     -0.01    0.992      -.226844     .2243996
     ip56c85 |    .0066825    .1152122      0.06    0.954     -.2191292     .2324943
     ip56c86 |    .0632739    .1141789      0.55    0.579     -.1605126     .2870603
     ip56c87 |    .0168007     .115053      0.15    0.884     -.2086991     .2423005
     ip56c88 |   -.0148824    .1155013     -0.13    0.897     -.2412609     .2114961
     ip56c89 |    .0522812    .1137184      0.46    0.646     -.1706027     .2751651
     ip56c90 |    .0873754    .1124547      0.78    0.437     -.1330318     .3077826
     ip56c91 |   -.0251999     .114102     -0.22    0.825     -.2488356     .1984359
     ip56c92 |     .079016    .1110223      0.71    0.477     -.1385838     .2966157
     ip56c93 |    .2155812      .10734      2.01    0.045      .0051987     .4259637
     ip56c94 |    .1625778     .107148      1.52    0.129     -.0474284      .372584
     ip56c95 |    .1308227    .1064552      1.23    0.219     -.0778257      .339471
     ip56c96 |    .2513921    .1037107      2.42    0.015      .0481229     .4546614
     ip56c97 |    .3352616    .1001804      3.35    0.001      .1389117     .5316115
     ip56c98 |    .1835495     .101297      1.81    0.070      -.014989     .3820881
     ip56c99 |    .1728891    .0999079      1.73    0.084     -.0229268      .368705
     ip57c80 |    .1062581    .1323561      0.80    0.422     -.1531552     .3656714
     ip57c81 |    .0494887    .1344964      0.37    0.713     -.2141195     .3130969
     ip57c82 |     .106484    .1339885      0.79    0.427     -.1561286     .3690966
     ip57c83 |    .1550329    .1336078      1.16    0.246     -.1068336     .4168995
     ip57c84 |    .1897514    .1334463      1.42    0.155     -.0717986     .4513013
     ip57c85 |    .2514405     .132598      1.90    0.058     -.0084467     .5113277
     ip57c86 |    .1640104      .13493      1.22    0.224     -.1004475     .4284684
     ip57c87 |    .0901556     .137015      0.66    0.511     -.1783888     .3587001
     ip57c88 |    .0860831    .1373058      0.63    0.531     -.1830313     .3551976
     ip57c89 |      .03597    .1386987      0.26    0.795     -.2358745     .3078144
     ip57c90 |    .1362548    .1360038      1.00    0.316     -.1303077     .4028173
     ip57c91 |    .1277813    .1360131      0.94    0.347     -.1387994      .394362
     ip57c92 |    .2705072    .1321489      2.05    0.041      .0115002     .5295142
     ip57c93 |    .1482016     .134701      1.10    0.271     -.1158076     .4122108
     ip57c94 |    .0755205    .1361194      0.55    0.579     -.1912687     .3423097
     ip57c95 |    .3247229    .1290745      2.52    0.012      .0717415     .5777044
     ip57c96 |     .110191    .1337968      0.82    0.410     -.1520459     .3724279
     ip57c97 |    .2428706    .1296466      1.87    0.061     -.0112321     .4969733
     ip57c98 |    .2548422    .1283975      1.98    0.047      .0031876     .5064967
     ip57c99 |    .0941175    .1318955      0.71    0.475     -.1643928     .3526279
     ip58c80 |   -.0772518    .1022714     -0.76    0.450     -.2777001     .1231965
     ip58c81 |   -.0078362     .101543     -0.08    0.938     -.2068569     .1911844
     ip58c82 |   -.0742114    .1031493     -0.72    0.472     -.2763804     .1279576
     ip58c83 |    .0013132    .1022372      0.01    0.990     -.1990679     .2016944
     ip58c84 |     .042014    .1018969      0.41    0.680     -.1577002     .2417282
     ip58c85 |   -.0064591    .1030183     -0.06    0.950     -.2083712      .195453
     ip58c86 |      .14051    .1007495      1.39    0.163     -.0569555     .3379755
     ip58c87 |    .0164365    .1029404      0.16    0.873      -.185323      .218196
     ip58c88 |    .0673796     .102065      0.66    0.509     -.1326641     .2674233
     ip58c89 |   -.2630882    .1085928     -2.42    0.015     -.4759262    -.0502502
     ip58c90 |   -.0569761    .1040944     -0.55    0.584     -.2609975     .1470452
     ip58c91 |   -.0906111    .1044969     -0.87    0.386     -.2954212      .114199
     ip58c92 |    .0543601    .1013289      0.54    0.592     -.1442409     .2529612
     ip58c93 |    .0029211     .101801      0.03    0.977     -.1966051     .2024473
     ip58c94 |    .1422311    .0986697      1.44    0.149      -.051158     .3356202
     ip58c95 |    .0335203    .0999643      0.34    0.737     -.1624061     .2294466
     ip58c96 |   -.0931297    .1020506     -0.91    0.361     -.2931453     .1068858
     ip58c97 |    .0492622    .0981264      0.50    0.616     -.1430621     .2415865
     ip58c98 |   -.0272696    .0987618     -0.28    0.782     -.2208391     .1662999
     ip58c99 |   -.1391588    .1003829     -1.39    0.166     -.3359057     .0575881
     ip59c80 |    .2836201    .1184684      2.39    0.017      .0514262      .515814
     ip59c81 |    .2665994    .1191961      2.24    0.025      .0329794     .5002194
     ip59c82 |    .0556097    .1240697      0.45    0.654     -.1875625     .2987818
     ip59c83 |    .2081559    .1212414      1.72    0.086      -.029473     .4457847
     ip59c84 |    .2937719    .1199486      2.45    0.014      .0586769     .5288669
     ip59c85 |    .1922825    .1223886      1.57    0.116     -.0475948     .4321598
     ip59c86 |    .2181994    .1221577      1.79    0.074     -.0212253     .4576241
     ip59c87 |      .02591    .1268708      0.20    0.838     -.2227521     .2745722
     ip59c88 |    .1357927    .1244112      1.09    0.275     -.1080486     .3796341
     ip59c89 |    .0244808    .1272336      0.19    0.847     -.2248924      .273854
     ip59c90 |   -.0189581    .1283982     -0.15    0.883     -.2706139     .2326977
     ip59c91 |    .0305909    .1270082      0.24    0.810     -.2183407     .2795225
     ip59c92 |   -.0091261    .1278828     -0.07    0.943     -.2597717     .2415196
     ip59c93 |    -.016612      .12781     -0.13    0.897     -.2671151      .233891
     ip59c94 |    .1017148    .1242975      0.82    0.413     -.1419038     .3453333
     ip59c95 |    .0993978    .1238656      0.80    0.422     -.1433743     .3421698
     ip59c96 |   -.0437287    .1268543     -0.34    0.730     -.2923586     .2049011
     ip59c97 |    .0826518    .1229717      0.67    0.502     -.1583684     .3236719
     ip59c98 |    .1956294    .1193632      1.64    0.101     -.0383182     .4295769
     ip59c99 |   -.0367265    .1248555     -0.29    0.769     -.2814388     .2079858
     ip60c80 |    .0719289    .1060531      0.68    0.498     -.1359314     .2797891
     ip60c81 |    .0099347    .1071727      0.09    0.926       -.20012     .2199893
     ip60c82 |    .1451338    .1050743      1.38    0.167     -.0608081     .3510757
     ip60c83 |    .0940584    .1060872      0.89    0.375     -.1138688     .3019855
     ip60c84 |    .0596838    .1068745      0.56    0.577     -.1497864      .269154
     ip60c85 |    .2200747    .1044721      2.11    0.035      .0153132     .4248361
     ip60c86 |    .0654611     .107115      0.61    0.541     -.1444804     .2754026
     ip60c87 |   -.0561616    .1094177     -0.51    0.608     -.2706163     .1582932
     ip60c88 |    .0507979    .1074468      0.47    0.636      -.159794     .2613898
     ip60c89 |    .0260487     .107777      0.24    0.809     -.1851902     .2372877
     ip60c90 |    .0074569    .1078835      0.07    0.945     -.2039909     .2189047
     ip60c91 |    .1375812     .105241      1.31    0.191     -.0686873     .3438497
     ip60c92 |    .1574388     .104393      1.51    0.132     -.0471676     .3620453
     ip60c93 |    .1591837    .1036892      1.54    0.125     -.0440434     .3624108
     ip60c94 |    .1934924       .1023      1.89    0.059      -.007012     .3939967
     ip60c95 |    .2258004    .1007963      2.24    0.025      .0282433     .4233576
     ip60c96 |    .3083746    .0982825      3.14    0.002      .1157444     .5010049
     ip60c97 |    .1610779    .0990897      1.63    0.104     -.0331343     .3552901
     ip60c98 |    .2743571    .0958503      2.86    0.004       .086494     .4622203
     ip60c99 |    .2541985    .0947151      2.68    0.007      .0685603     .4398367
     ip61c80 |   -.1017636     .091739     -1.11    0.267     -.2815688     .0780416
     ip61c81 |   -.1271373    .0921129     -1.38    0.168     -.3076752     .0534006
     ip61c82 |   -.0670132     .091261     -0.73    0.463     -.2458814      .111855
     ip61c83 |    .0013215    .0903861      0.01    0.988     -.1758319     .1784749
     ip61c84 |    .0580457    .0897629      0.65    0.518     -.1178865     .2339778
     ip61c85 |    .0802395    .0896884      0.89    0.371     -.0955465     .2560255
     ip61c86 |    .1554119     .088839      1.75    0.080     -.0187093     .3295331
     ip61c87 |   -.0308625     .091984     -0.34    0.737     -.2111479     .1494229
     ip61c88 |       .0494    .0908728      0.54    0.587     -.1287074     .2275075
     ip61c89 |    .0876864    .0904034      0.97    0.332     -.0895009     .2648738
     ip61c90 |     .005243    .0918332      0.06    0.954     -.1747467     .1852328
     ip61c91 |    .0984406     .090277      1.09    0.276      -.078499     .2753802
     ip61c92 |    .0300369    .0913096      0.33    0.742     -.1489265     .2090004
     ip61c93 |    .1451229    .0892124      1.63    0.104     -.0297302     .3199761
     ip61c94 |    .0318958    .0907963      0.35    0.725     -.1460616     .2098532
     ip61c95 |    .0888668    .0894286      0.99    0.320     -.0864101     .2641437
     ip61c96 |    .0012194    .0912642      0.01    0.989     -.1776552      .180094
     ip61c97 |    .0399954    .0894228      0.45    0.655       -.13527     .2152609
     ip61c98 |    .0236046     .089049      0.27    0.791     -.1509281     .1981374
     ip61c99 |   -.0513809    .0898022     -0.57    0.567     -.2273899     .1246281
     ip62c80 |    .2126939    .0995131      2.14    0.033      .0176518      .407736
     ip62c81 |    .0841352    .1010549      0.83    0.405     -.1139288     .2821993
     ip62c82 |    .2914435    .0976022      2.99    0.003      .1001467     .4827404
     ip62c83 |    .1610325     .099472      1.62    0.105      -.033929      .355994
     ip62c84 |    .3214438     .096986      3.31    0.001      .1313548     .5115328
     ip62c85 |     .240105    .0982809      2.44    0.015       .047478      .432732
     ip62c86 |     .203597    .0989957      2.06    0.040       .009569      .397625
     ip62c87 |    .2068514    .0990834      2.09    0.037      .0126516     .4010513
     ip62c88 |     .123554    .1006932      1.23    0.220     -.0738011     .3209091
     ip62c89 |    .1589829    .1001705      1.59    0.112     -.0373478     .3553135
     ip62c90 |    .0804055     .101721      0.79    0.429      -.118964      .279775
     ip62c91 |    .2205626    .0991487      2.22    0.026      .0262348     .4148904
     ip62c92 |    .0431991    .1024557      0.42    0.673     -.1576104     .2440086
     ip62c93 |    .2477476    .0984596      2.52    0.012      .0547702     .4407249
     ip62c94 |    .1021334    .1009558      1.01    0.312     -.0957364     .3000032
     ip62c95 |    .0908112       .1009      0.90    0.368     -.1069492     .2885716
     ip62c96 |    .1129001    .1001948      1.13    0.260     -.0834781     .3092782
     ip62c97 |    .0095096    .1016919      0.09    0.925     -.1898028      .208822
     ip62c98 |    .0680979    .0999248      0.68    0.496      -.127751     .2639468
     ip62c99 |    .0302709     .100214      0.30    0.763     -.1661448     .2266867
     ip63c80 |    .1301883    .0911216      1.43    0.153     -.0484068     .3087834
     ip63c81 |    .0463258    .0915587      0.51    0.613     -.1331261     .2257776
     ip63c82 |    .0214639    .0913921      0.23    0.814     -.1576614     .2005891
     ip63c83 |    .1064762    .0897041      1.19    0.235     -.0693405     .2822929
     ip63c84 |    .0809499    .0898182      0.90    0.367     -.0950906     .2569904
     ip63c85 |    .1721055    .0882811      1.95    0.051     -.0009223     .3451333
     ip63c86 |   -.0648628     .091995     -0.71    0.481     -.2451696      .115444
     ip63c87 |    .0415602    .0901412      0.46    0.645     -.1351133     .2182336
     ip63c88 |   -.0392392    .0915112     -0.43    0.668     -.2185979     .1401196
     ip63c89 |   -.1118848    .0928511     -1.20    0.228     -.2938696     .0700999
     ip63c90 |   -.0900898    .0924414     -0.97    0.330     -.2712716      .091092
     ip63c91 |    .0161663    .0904927      0.18    0.858      -.161196     .1935287
     ip63c92 |    .1042032    .0889394      1.17    0.241     -.0701149     .2785213
     ip63c93 |   -.1202746    .0928644     -1.30    0.195     -.3022854     .0617363
     ip63c94 |   -.0276158    .0909694     -0.30    0.761     -.2059126      .150681
     ip63c95 |   -.1175055    .0925108     -1.27    0.204     -.2988234     .0638123
     ip63c96 |    .0704925    .0887937      0.79    0.427       -.10354     .2445251
     ip63c97 |    .0065056    .0893909      0.07    0.942     -.1686973     .1817085
     ip63c98 |    .0201031    .0888047      0.23    0.821     -.1539509      .194157
     ip63c99 |    .0471771    .0880087      0.54    0.592     -.1253168      .219671
     ip64c80 |    .2209395    .0946072      2.34    0.020      .0355128     .4063661
     ip64c81 |    .1848225      .09362      1.97    0.048      .0013307     .3683143
     ip64c82 |    .1932466    .0924662      2.09    0.037      .0120163      .374477
     ip64c83 |    .3885866    .0893113      4.35    0.000      .2135397     .5636334
     ip64c84 |    .3224572    .0895086      3.60    0.000      .1470235      .497891
     ip64c85 |    .3622383     .088634      4.09    0.000      .1885189     .5359577
     ip64c86 |     .231869    .0901573      2.57    0.010      .0551639     .4085741
     ip64c87 |    .2481651    .0898399      2.76    0.006       .072082     .4242482
     ip64c88 |    .1252561    .0917299      1.37    0.172     -.0545312     .3050433
     ip64c89 |    .0374835    .0932995      0.40    0.688     -.1453802     .2203471
     ip64c90 |    .2592069     .089702      2.89    0.004      .0833943     .4350195
     ip64c91 |    .2385282    .0900331      2.65    0.008      .0620665     .4149899
     ip64c92 |    .0833559    .0926365      0.90    0.368     -.0982084     .2649202
     ip64c93 |   -.0410446    .0949771     -0.43    0.666     -.2271962      .145107
     ip64c94 |    .1132362     .091948      1.23    0.218     -.0669786     .2934509
     ip64c95 |     .119945    .0916409      1.31    0.191     -.0596679     .2995579
     ip64c96 |    .1284651    .0912338      1.41    0.159     -.0503498     .3072801
     ip64c97 |    .1050286    .0910425      1.15    0.249     -.0734114     .2834687
     ip64c98 |    .0501913    .0916119      0.55    0.584     -.1293647     .2297473
     ip64c99 |     .108551    .0900827      1.21    0.228     -.0680079     .2851099
     ip65c80 |    .1246999    .0904827      1.38    0.168      -.052643     .3020427
     ip65c81 |    .1454518    .0881899      1.65    0.099     -.0273972     .3183008
     ip65c82 |    .1311172    .0866389      1.51    0.130      -.038692     .3009264
     ip65c83 |    .1188437    .0854224      1.39    0.164     -.0485812     .2862685
     ip65c84 |    .1211982    .0843418      1.44    0.151     -.0441088     .2865051
     ip65c85 |    .1492396    .0832039      1.79    0.073     -.0138371     .3123163
     ip65c86 |    .0984793    .0832288      1.18    0.237     -.0646461     .2616046
     ip65c87 |     .132043    .0823767      1.60    0.109     -.0294124     .2934985
     ip65c88 |    .0138242    .0836739      0.17    0.869     -.1501736      .177822
     ip65c89 |    .1422463    .0817276      1.74    0.082     -.0179368     .3024293
     ip65c90 |    .2086206    .0807221      2.58    0.010      .0504081     .3668331
     ip65c91 |    .0431324    .0828478      0.52    0.603     -.1192464     .2055112
     ip65c92 |     .124992     .081594      1.53    0.126     -.0349292     .2849132
     ip65c93 |    .0965867    .0818888      1.18    0.238     -.0639124     .2570857
     ip65c94 |    .0280876    .0827837      0.34    0.734     -.1341656     .1903407
     ip65c95 |    .0856658    .0817691      1.05    0.295     -.0745987     .2459302
     ip65c96 |    .0508699     .082034      0.62    0.535     -.1099138     .2116536
     ip65c97 |    .0477218    .0815432      0.59    0.558     -.1120998     .2075434
     ip65c98 |    .0258508    .0815341      0.32    0.751     -.1339531     .1856548
     ip65c99 |     .080278    .0806325      1.00    0.319     -.0777587     .2383148
     ip56c00 |    .3187102    .0870297      3.66    0.000      .1481351     .4892853
     ip56c01 |     .251391    .0866287      2.90    0.004       .081602     .4211801
     ip56c02 |    .3188763    .0834482      3.82    0.000      .1553209     .4824318
     ip56c03 |    .1980135    .0842539      2.35    0.019       .032879     .3631481
     ip56c04 |    .2084761    .0828952      2.51    0.012      .0460046     .3709477
     ip57c00 |    .2362109    .1203151      1.96    0.050      .0003976     .4720242
     ip57c01 |     .097977    .1232903      0.79    0.427     -.1436675     .3396215
     ip57c02 |    .1765983    .1194642      1.48    0.139     -.0575471     .4107438
     ip57c03 |    .3247528    .1148799      2.83    0.005      .0995922     .5499133
     ip57c04 |    .1663005    .1183367      1.41    0.160     -.0656351     .3982362
     ip58c00 |   -.0635979    .0905622     -0.70    0.483     -.2410967     .1139008
     ip58c01 |    .1432344    .0852086      1.68    0.093     -.0237714     .3102403
     ip58c02 |   -.1266499    .0889286     -1.42    0.154     -.3009468     .0476469
     ip58c03 |    .0095311    .0852112      0.11    0.911     -.1574799     .1765421
     ip58c04 |    .0593293    .0836894      0.71    0.478     -.1046989     .2233575
     ip59c00 |   -.1749135    .1225885     -1.43    0.154     -.4151825     .0653556
     ip59c01 |    .0708094    .1144244      0.62    0.536     -.1534584     .2950771
     ip59c02 |   -.0147424    .1147412     -0.13    0.898     -.2396311     .2101463
     ip59c03 |    .0545635    .1121689      0.49    0.627     -.1652834     .2744105
     ip59c04 |    .0178061    .1126635      0.16    0.874     -.2030103     .2386225
     ip60c00 |    .0445993    .0914469      0.49    0.626     -.1346334      .223832
     ip60c01 |    .1109505    .0882718      1.26    0.209     -.0620591     .2839601
     ip60c02 |     .137264    .0851103      1.61    0.107     -.0295492     .3040772
     ip60c03 |    .1234685    .0842332      1.47    0.143     -.0416256     .2885627
     ip60c04 |     .160856    .0831705      1.93    0.053     -.0021552     .3238672
     ip61c00 |    .0574429     .078125      0.74    0.462     -.0956793     .2105651
     ip61c01 |    .0167873    .0781206      0.21    0.830     -.1363264      .169901
     ip61c02 |    .0335824    .0764164      0.44    0.660     -.1161911     .1833558
     ip61c03 |    .1260339    .0739094      1.71    0.088     -.0188259     .2708936
     ip61c04 |    .0992028     .073672      1.35    0.178     -.0451918     .2435973
     ip62c00 |    .0196709    .0924049      0.21    0.831     -.1614394     .2007811
     ip62c01 |    .1817475    .0884506      2.05    0.040      .0083874     .3551076
     ip62c02 |    .0773047    .0893289      0.87    0.387     -.0977768     .2523862
     ip62c03 |    .0621235    .0891215      0.70    0.486     -.1125514     .2367985
     ip62c04 |    .1948978    .0859782      2.27    0.023      .0263835      .363412
     ip63c00 |    .0228982    .0809717      0.28    0.777     -.1358035     .1815999
     ip63c01 |    .1321106    .0788848      1.67    0.094     -.0225008      .286722
     ip63c02 |    .0988758    .0773472      1.28    0.201     -.0527219     .2504736
     ip63c03 |    .1391864    .0763442      1.82    0.068     -.0104454     .2888183
     ip63c04 |    .1304665    .0763115      1.71    0.087     -.0191012     .2800343
     ip64c00 |    .0600725    .0831218      0.72    0.470     -.1028432     .2229883
     ip64c01 |     .072225    .0824008      0.88    0.381     -.0892777     .2337277
     ip64c02 |    .1067264    .0799991      1.33    0.182     -.0500691     .2635218
     ip64c03 |    .1065326    .0793457      1.34    0.179     -.0489821     .2620474
     ip64c04 |    .1183986    .0785238      1.51    0.132     -.0355052     .2723023
     ip65c00 |    .0162448     .072864      0.22    0.824      -.126566     .1590556
     ip65c01 |    .0408069    .0722501      0.56    0.572     -.1008006     .1824145
     ip65c02 |   -.0115226    .0715515     -0.16    0.872     -.1517609     .1287158
     ip65c03 |    .0337412    .0704567      0.48    0.632     -.1043513     .1718338
     ip65c04 |    .0016041     .070786      0.02    0.982     -.1371339      .140342
 ia1journal2 |   -.0618906    .0140694     -4.40    0.000     -.0894661     -.034315
 ia1journal3 |   -.1177793    .0185528     -6.35    0.000     -.1541421    -.0814166
 ia1journal4 |   -.0780113    .0175895     -4.44    0.000     -.1124861    -.0435364
 ia1journal5 |   -.0723469     .014125     -5.12    0.000     -.1000313    -.0446624
 ia1journal6 |   -.1074851     .068509     -1.57    0.117     -.2417603     .0267901
 ia1journal7 |   -.0093224    .0333118     -0.28    0.780     -.0746123     .0559675
 ia1journal8 |   -.0019184    .0217391     -0.09    0.930     -.0445263     .0406896
 ia1journal9 |   -.0354476    .0198513     -1.79    0.074     -.0743554     .0034602
ia1journal10 |   -.2082865    .0243146     -8.57    0.000     -.2559422    -.1606308
ia1journal11 |    .0601777    .0232608      2.59    0.010      .0145873     .1057681
ia1journal12 |   -.0167523    .0329696     -0.51    0.611     -.0813714     .0478668
ia1journal13 |   -.0407261     .024821     -1.64    0.101     -.0893743     .0079222
ia1journal14 |    .0601736    .0317465      1.90    0.058     -.0020483     .1223955
ia1journal15 |     .037724    .0395778      0.95    0.341     -.0398471     .1152952
ia1journal16 |   -.0173201    .1171138     -0.15    0.882      -.246859     .2122188
ia1journal17 |   -.0860476    .0197965     -4.35    0.000      -.124848    -.0472471
ia1journal18 |   -.0277325    .1002356     -0.28    0.782     -.2241908     .1687257
ia1journal19 |   -.3669123    .1661117     -2.21    0.027     -.6924853    -.0413394
ia1journal20 |   -.0109989    .0154803     -0.71    0.477     -.0413396     .0193419
ia1journal21 |    .0435482    .0565417      0.77    0.441     -.0672715     .1543678
ia1journal22 |    .0888526    .1812073      0.49    0.624     -.2663072     .4440124
ia1journal23 |   -.1895855    .0981552     -1.93    0.053     -.3819661     .0027952
ia1journal24 |   -.2173547    .2567651     -0.85    0.397      -.720605     .2858956
ia1journal26 |    .0012088    .1991884      0.01    0.995     -.3891933     .3916109
ia1journal27 |   -.1176757    .0220722     -5.33    0.000     -.1609363     -.074415
ia1journal28 |   -.0254691     .085948     -0.30    0.767     -.1939241     .1429859
ia1journal29 |   -.0740182    .0458707     -1.61    0.107      -.163923     .0158867
ia1journal30 |      .08851    .0279693      3.16    0.002      .0336912     .1433289
ia1journal31 |   -.0322797    .0295282     -1.09    0.274     -.0901539     .0255945
ia1journal32 |   -.1550381    .0413589     -3.75    0.000        -.2361    -.0739762
ia1journal33 |    .0980877    .1083562      0.91    0.365     -.1142866      .310462
ia1journal34 |   -.0539716    .0452186     -1.19    0.233     -.1425985     .0346553
ia1journal35 |    .3920635    .4435479      0.88    0.377     -.4772745     1.261401
ia1journal36 |   -.1108803    .2174696     -0.51    0.610     -.5371128     .3153522
ia1journal37 |    .0612037    .0777329      0.79    0.431       -.09115     .2135575
ia1journal38 |   -.0342799    .0271146     -1.26    0.206     -.0874234     .0188637
ia1journal39 |    .0473769    .0683812      0.69    0.488     -.0866478     .1814016
 ia2journal2 |    .0006765    .0002213      3.06    0.002      .0002428     .0011103
 ia2journal3 |    .0018994    .0002845      6.68    0.000      .0013418      .002457
 ia2journal4 |    .0010492    .0002784      3.77    0.000      .0005036     .0015949
 ia2journal5 |    .0010934    .0002214      4.94    0.000      .0006594     .0015273
 ia2journal6 |    .0010935    .0011167      0.98    0.327     -.0010952     .0032823
 ia2journal7 |   -7.35e-06    .0005384     -0.01    0.989     -.0010626     .0010479
 ia2journal8 |   -.0001036    .0003603     -0.29    0.774     -.0008097     .0006025
 ia2journal9 |    .0007186    .0003144      2.29    0.022      .0001025     .0013348
ia2journal10 |    .0037879     .000399      9.49    0.000      .0030057       .00457
ia2journal11 |   -.0006097    .0003776     -1.61    0.106     -.0013498     .0001304
ia2journal12 |   -.0004852    .0005315     -0.91    0.361      -.001527     .0005566
ia2journal13 |    .0003669    .0003933      0.93    0.351      -.000404     .0011378
ia2journal14 |   -.0010282    .0005254     -1.96    0.050      -.002058     1.55e-06
ia2journal15 |   -.0013592    .0006534     -2.08    0.038     -.0026397    -.0000786
ia2journal16 |    .0001709    .0019685      0.09    0.931     -.0036872      .004029
ia2journal17 |    .0007873    .0003124      2.52    0.012      .0001751     .0013995
ia2journal18 |   -.0000245    .0016896     -0.01    0.988     -.0033361      .003287
ia2journal19 |     .006555    .0028627      2.29    0.022      .0009443     .0121657
ia2journal20 |    .0001769    .0002455      0.72    0.471     -.0003043     .0006581
ia2journal21 |   -.0012624    .0009182     -1.37    0.169      -.003062     .0005372
ia2journal22 |   -.0015514    .0029201     -0.53    0.595     -.0072747     .0041718
ia2journal23 |    .0031174    .0016005      1.95    0.051     -.0000196     .0062544
ia2journal24 |    .0020186    .0038334      0.53    0.598     -.0054947     .0095318
ia2journal26 |   -.0008977    .0036263     -0.25    0.804     -.0080052     .0062098
ia2journal27 |    .0018219    .0003553      5.13    0.000      .0011256     .0025183
ia2journal28 |   -.0001263    .0014599     -0.09    0.931     -.0029876      .002735
ia2journal29 |    .0004888    .0008028      0.61    0.543     -.0010847     .0020622
ia2journal30 |   -.0008145    .0004259     -1.91    0.056     -.0016493     .0000203
ia2journal31 |      .00028    .0004699      0.60    0.551      -.000641     .0012009
ia2journal32 |    .0024327    .0007402      3.29    0.001      .0009819     .0038834
ia2journal33 |   -.0025181    .0018612     -1.35    0.176      -.006166     .0011298
ia2journal34 |    .0001413    .0007496      0.19    0.851      -.001328     .0016105
ia2journal35 |   -.0141275    .0097255     -1.45    0.146     -.0331892     .0049341
ia2journal36 |    .0005919    .0037915      0.16    0.876     -.0068393     .0080231
ia2journal37 |   -.0016222    .0012682     -1.28    0.201     -.0041079     .0008634
ia2journal38 |   -.0000163    .0004414     -0.04    0.970     -.0008815     .0008488
ia2journal39 |    -.000876    .0010802     -0.81    0.417     -.0029931     .0012412
       d1c95 |    .0641284    .0329701      1.95    0.052     -.0004917     .1287485
       d1c00 |   -.0355005    .0454213     -0.78    0.434     -.1245246     .0535236
       d2c95 |    .0035149    .0268819      0.13    0.896     -.0491726     .0562024
       d2c00 |     .070317     .036422      1.93    0.054     -.0010687     .1417028
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     ip56c80 |    1.040678    .1726043      0.24    0.810      .7518616     1.440438
     ip56c81 |    .8975513     .153198     -0.63    0.527       .642351      1.25414
     ip56c82 |     .995584    .1679136     -0.03    0.979      .7153451     1.385607
     ip56c83 |    1.012025    .1727068      0.07    0.944      .7243185     1.414011
     ip56c84 |    .9987785    .1650475     -0.01    0.994      .7224515     1.380797
     ip56c85 |    1.006705    .2240576      0.03    0.976      .6508101      1.55722
     ip56c86 |    1.065319    .2334765      0.29    0.773      .6933127     1.636929
     ip56c87 |    1.016943    .2180194      0.08    0.938      .6680513     1.548043
     ip56c88 |    .9852278     .207091     -0.07    0.944      .6525555     1.487496
     ip56c89 |    1.053672    .2138854      0.26    0.797      .7078147     1.568524
     ip56c90 |    1.091306    .1807276      0.53    0.598      .7888273     1.509772
     ip56c91 |     .975115    .1678298     -0.15    0.884      .6959101     1.366339
     ip56c92 |    1.082222    .1751035      0.49    0.625      .7881189     1.486075
     ip56c93 |    1.240583      .13802      1.94    0.053      .9975302     1.542856
     ip56c94 |     1.17654     .188437      1.02    0.310      .8595606     1.610411
     ip56c95 |    1.139766    .1090037      1.37    0.171       .944951     1.374744
     ip56c96 |    1.285814    .1907581      1.69    0.090      .9613853     1.719725
     ip56c97 |    1.398306    .1502925      3.12    0.002      1.132696     1.726199
     ip56c98 |    1.201474     .133861      1.65    0.099      .9657815     1.494687
     ip56c99 |    1.188734    .0744388      2.76    0.006      1.051435     1.343963
     ip57c80 |    1.112109    .1894817      0.62    0.533      .7963778     1.553014
     ip57c81 |    1.050734    .2689337      0.19    0.847      .6362517     1.735227
     ip57c82 |     1.11236    .3057785      0.39    0.698      .6490187     1.906486
     ip57c83 |    1.167696    .2704602      0.67    0.503      .7416104     1.838587
     ip57c84 |    1.208949     .255501      0.90    0.369      .7989393     1.829373
     ip57c85 |    1.285876    .2570716      1.26    0.208      .8690155     1.902703
     ip57c86 |    1.178227     .226922      0.85    0.394      .8077754     1.718569
     ip57c87 |    1.094345    .2834125      0.35    0.728      .6587348     1.818016
     ip57c88 |    1.089897    .2037245      0.46    0.645      .7555759     1.572146
     ip57c89 |    1.036625    .1933197      0.19    0.847      .7192525     1.494038
     ip57c90 |    1.145974    .2834311      0.55    0.582      .7057469     1.860803
     ip57c91 |    1.136304    .1504218      0.97    0.334       .876626     1.472906
     ip57c92 |    1.310629    .1901785      1.86    0.062      .9862031      1.74178
     ip57c93 |    1.159747    .1979135      0.87    0.385      .8300487     1.620402
     ip57c94 |    1.078445     .136241      0.60    0.550      .8419088     1.381438
     ip57c95 |    1.383647      .19862      2.26    0.024      1.044328     1.833217
     ip57c96 |    1.116491    .1321952      0.93    0.352      .8852604      1.40812
     ip57c97 |    1.274904    .1091678      2.84    0.005       1.07793     1.507871
     ip57c98 |    1.290258    .1108507      2.97    0.003      1.090302     1.526885
     ip57c99 |    1.098689    .1057687      0.98    0.328      .9097691     1.326839
     ip58c80 |    .9256567    .1518354     -0.47    0.638      .6711622     1.276652
     ip58c81 |    .9921944     .174152     -0.04    0.964      .7033834     1.399592
     ip58c82 |    .9284754    .1586483     -0.43    0.664      .6642412     1.297822
     ip58c83 |    1.001314    .1834181      0.01    0.994      .6992773     1.433809
     ip58c84 |    1.042909    .1535134      0.29    0.775      .7815412     1.391685
     ip58c85 |    .9935617    .1960155     -0.03    0.974      .6749397     1.462597
     ip58c86 |    1.150861    .2010564      0.80    0.421      .8171787     1.620796
     ip58c87 |    1.016572     .151242      0.11    0.912      .7594507     1.360746
     ip58c88 |    1.069701    .1648779      0.44    0.662      .7907934     1.446979
     ip58c89 |    .7686741    .1341374     -1.51    0.132      .5460136     1.082134
     ip58c90 |    .9446166    .1450574     -0.37    0.711      .6991063     1.276345
     ip58c91 |    .9133728    .1159966     -0.71    0.476      .7121102     1.171518
     ip58c92 |    1.055865    .1284418      0.45    0.655      .8318844     1.340151
     ip58c93 |    1.002925     .165743      0.02    0.986      .7254366     1.386557
     ip58c94 |    1.152843    .1719066      0.95    0.340      .8606824     1.544178
     ip58c95 |    1.034088    .1453225      0.24    0.811       .785121     1.362005
     ip58c96 |    .9110753    .1135364     -0.75    0.455      .7136401     1.163133
     ip58c97 |    1.050496    .1349954      0.38    0.701      .8166002     1.351385
     ip58c98 |    .9730989    .1004216     -0.26    0.792      .7949043      1.19124
     ip58c99 |    .8700898    .1013459     -1.19    0.232      .6924976     1.093226
     ip59c80 |    1.327928    .2403975      1.57    0.117      .9312793     1.893518
     ip59c81 |    1.305517    .2467964      1.41    0.158      .9013026     1.891014
     ip59c82 |    1.057185    .2167733      0.27    0.786       .707317     1.580112
     ip59c83 |    1.231405    .2280558      1.12    0.261      .8565617     1.770285
     ip59c84 |    1.341478    .1740344      2.26    0.024       1.04029     1.729867
     ip59c85 |    1.212013    .1938361      1.20    0.229       .885881     1.658208
     ip59c86 |    1.243835    .2023316      1.34    0.180      .9042738     1.710904
     ip59c87 |    1.026249    .1710896      0.16    0.876      .7401943     1.422851
     ip59c88 |    1.145444    .2115957      0.74    0.462      .7975048     1.645185
     ip59c89 |    1.024783    .2002047      0.13    0.900      .6987769     1.502883
     ip59c90 |    .9812205    .1669755     -0.11    0.911      .7029373     1.369672
     ip59c91 |    1.031064    .1588285      0.20    0.843       .762366     1.394464
     ip59c92 |    .9909155    .1448794     -0.06    0.950      .7440197     1.319741
     ip59c93 |    .9835252    .1383929     -0.12    0.906      .7464694     1.295863
     ip59c94 |    1.107068    .1877263      0.60    0.549       .794027     1.543523
     ip59c95 |    1.104506    .1092377      1.01    0.315      .9098766     1.340767
     ip59c96 |    .9572136    .1285274     -0.33    0.745      .7357258      1.24538
     ip59c97 |    1.086163    .1104681      0.81    0.416      .8898645     1.325765
     ip59c98 |    1.216076    .1966536      1.21    0.226      .8857509      1.66959
     ip59c99 |    .9639397    .1580602     -0.22    0.823      .6989976     1.329303
     ip60c80 |    1.074579    .2148635      0.36    0.719      .7261719     1.590147
     ip60c81 |    1.009984    .1693844      0.06    0.953      .7270422     1.403038
     ip60c82 |    1.156194    .2235799      0.75    0.453      .7914603     1.689011
     ip60c83 |    1.098624    .1982919      0.52    0.602      .7712847     1.564888
     ip60c84 |    1.061501    .2143334      0.30    0.768      .7145779     1.576853
     ip60c85 |     1.24617    .1949823      1.41    0.160      .9170515     1.693404
     ip60c86 |    1.067651    .1613859      0.43    0.665       .793893      1.43581
     ip60c87 |    .9453864    .1865637     -0.28    0.776      .6421436     1.391831
     ip60c88 |     1.05211    .1610157      0.33    0.740      .7794581     1.420135
     ip60c89 |    1.026391    .1565659      0.17    0.864      .7611501     1.384061
     ip60c90 |    1.007485    .1306854      0.06    0.954      .7813135     1.299127
     ip60c91 |    1.147495    .1542483      1.02    0.306      .8817201     1.493381
     ip60c92 |    1.170509    .1523389      1.21    0.226      .9069702     1.510625
     ip60c93 |    1.172553    .2154013      0.87    0.386      .8180211     1.680741
     ip60c94 |     1.21348    .2129027      1.10    0.270      .8603814      1.71149
     ip60c95 |    1.253326    .1873706      1.51    0.131      .9349973     1.680031
     ip60c96 |    1.361211    .2026982      2.07    0.038      1.016653     1.822544
     ip60c97 |    1.174776    .1755115      1.08    0.281      .8765685     1.574435
     ip60c98 |    1.315685     .176701      2.04    0.041      1.011189     1.711871
     ip60c99 |    1.289428    .1627822      2.01    0.044      1.006788     1.651414
     ip61c80 |    .9032431    .1390384     -0.66    0.509       .668001     1.221327
     ip61c81 |    .8806127    .1358423     -0.82    0.410      .6508481      1.19149
     ip61c82 |    .9351828    .1123281     -0.56    0.577      .7390191     1.183416
     ip61c83 |    1.001322    .1241068      0.01    0.991      .7853686     1.276657
     ip61c84 |    1.059763    .1638114      0.38    0.707      .7827727      1.43477
     ip61c85 |    1.083547    .1151525      0.76    0.450      .8798067     1.334467
     ip61c86 |    1.168139    .1385273      1.31    0.190      .9258747     1.473794
     ip61c87 |    .9696089    .0941834     -0.32    0.751      .8015206     1.172947
     ip61c88 |    1.050641     .120479      0.43    0.667      .8391609     1.315416
     ip61c89 |    1.091646    .1127749      0.85    0.396      .8915516     1.336648
     ip61c90 |    1.005257      .09971      0.05    0.958      .8276516     1.220974
     ip61c91 |    1.103449    .1306238      0.83    0.406      .8749614     1.391604
     ip61c92 |    1.030493    .0962254      0.32    0.748      .8581462     1.237452
     ip61c93 |    1.156182    .0781861      2.15    0.032      1.012661     1.320043
     ip61c94 |     1.03241    .1258786      0.26    0.794      .8129573     1.311102
     ip61c95 |    1.092935    .0924398      1.05    0.293      .9259771     1.289996
     ip61c96 |     1.00122    .0967675      0.01    0.990      .8284406     1.210035
     ip61c97 |    1.040806    .0915297      0.45    0.649      .8760202     1.236589
     ip61c98 |    1.023885    .0848671      0.28    0.776      .8703573     1.204495
     ip61c99 |    .9499168    .0706864     -0.69    0.490      .8210033     1.099072
     ip62c80 |    1.237006    .2197417      1.20    0.231      .8733018     1.752182
     ip62c81 |    1.087776    .1246964      0.73    0.463      .8688857     1.361809
     ip62c82 |    1.338358    .1845662      2.11    0.035       1.02138     1.753708
     ip62c83 |    1.174723    .2171126      0.87    0.384      .8177419     1.687543
     ip62c84 |    1.379118    .2244041      1.98    0.048       1.00253     1.897165
     ip62c85 |    1.271383      .20216      1.51    0.131      .9309544     1.736297
     ip62c86 |    1.225804     .184483      1.35    0.176      .9126738     1.646366
     ip62c87 |      1.2298    .1931356      1.32    0.188      .9039748     1.673064
     ip62c88 |    1.131511    .1481823      0.94    0.345      .8753581     1.462621
     ip62c89 |    1.172318    .1213204      1.54    0.124      .9570982     1.435933
     ip62c90 |    1.083726    .1398759      0.62    0.533      .8415029     1.395673
     ip62c91 |    1.246778    .1114408      2.47    0.014       1.04642     1.485498
     ip62c92 |    1.044146    .1161475      0.39    0.698      .8396071     1.298512
     ip62c93 |    1.281137    .1354312      2.34    0.019       1.04139     1.576077
     ip62c94 |    1.107531    .1312866      0.86    0.389      .8779193     1.397196
     ip62c95 |    1.095062    .1374163      0.72    0.469       .856296     1.400405
     ip62c96 |     1.11952    .1342165      0.94    0.346      .8850818     1.416056
     ip62c97 |    1.009555    .1031644      0.09    0.926      .8263183     1.233425
     ip62c98 |     1.07047    .1071032      0.68    0.496      .8798522     1.302385
     ip62c99 |    1.030734    .0900083      0.35    0.729      .8685918     1.223143
     ip63c80 |    1.139043    .1635799      0.91    0.365      .8596022     1.509324
     ip63c81 |    1.047416    .1854851      0.26    0.794      .7402547      1.48203
     ip63c82 |    1.021696    .1606439      0.14    0.891      .7507321     1.390459
     ip63c83 |    1.112351    .1654793      0.72    0.474      .8310225      1.48892
     ip63c84 |    1.084317    .1719736      0.51    0.610      .7946113     1.479645
     ip63c85 |    1.187803    .1902285      1.07    0.283      .8678071     1.625795
     ip63c86 |     .937196    .1186327     -0.51    0.608       .731279     1.201096
     ip63c87 |    1.042436    .1406194      0.31    0.758      .8002516     1.357914
     ip63c88 |    .9615207    .1273995     -0.30    0.767      .7416111      1.24664
     ip63c89 |    .8941472    .1317914     -0.76    0.448      .6698037     1.193632
     ip63c90 |    .9138491    .1467876     -0.56    0.575      .6670366     1.251985
     ip63c91 |    1.016298    .1801363      0.09    0.927      .7180382     1.438448
     ip63c92 |    1.109826    .2036409      0.57    0.570      .7745843     1.590161
     ip63c93 |    .8866769    .0907243     -1.18    0.240      .7255559     1.083577
     ip63c94 |     .972762    .1237398     -0.22    0.828      .7581059     1.248198
     ip63c95 |    .8891356    .1296493     -0.81    0.420      .6681131     1.183276
     ip63c96 |    1.073037    .1570341      0.48    0.630      .8054618       1.4295
     ip63c97 |    1.006527    .1465497      0.04    0.964      .7566429     1.338936
     ip63c98 |    1.020306    .1121005      0.18    0.855      .8226397     1.265469
     ip63c99 |    1.048308    .0900928      0.55    0.583      .8857996     1.240629
     ip64c80 |    1.247248    .2133822      1.29    0.197      .8919225     1.744128
     ip64c81 |    1.203005    .2086433      1.07    0.287      .8563261     1.690035
     ip64c82 |    1.213182    .1896428      1.24    0.216      .8930327     1.648104
     ip64c83 |    1.474895     .248522      2.31    0.021      1.060064     2.052059
     ip64c84 |    1.380516    .1969953      2.26    0.024      1.043705     1.826019
     ip64c85 |    1.436541    .2300256      2.26    0.024       1.04959     1.966149
     ip64c86 |    1.260955    .1890197      1.55    0.122      .9399452     1.691595
     ip64c87 |    1.281672    .2181109      1.46    0.145      .9181674     1.789088
     ip64c88 |    1.133439    .1570215      0.90    0.366      .8639257      1.48703
     ip64c89 |    1.038195    .1408794      0.28    0.782      .7957447     1.354515
     ip64c90 |    1.295902    .2223504      1.51    0.131       .925813     1.813932
     ip64c91 |    1.269379    .1847956      1.64    0.101      .9542759     1.688531
     ip64c92 |    1.086929    .1494491      0.61    0.544      .8301634      1.42311
     ip64c93 |    .9597864    .1044286     -0.38    0.706      .7754619     1.187924
     ip64c94 |    1.119896    .1218611      1.04    0.298      .9048043     1.386121
     ip64c95 |    1.127435    .1597342      0.85    0.397      .8540706     1.488295
     ip64c96 |    1.137082    .1452632      1.01    0.315      .8852174     1.460607
     ip64c97 |    1.110742    .1005099      1.16    0.246      .9302272     1.326287
     ip64c98 |    1.051472    .1225283      0.43    0.667       .836772     1.321261
     ip64c99 |    1.114662    .1315912      0.92    0.358       .884412     1.404855
     ip65c80 |    1.132808     .126995      1.11    0.266      .9093506     1.411177
     ip65c81 |    1.156562    .1289033      1.31    0.192      .9296066     1.438926
     ip65c82 |    1.140101    .1354167      1.10    0.270       .903319      1.43895
     ip65c83 |    1.126194    .1480814      0.90    0.366      .8703422     1.457257
     ip65c84 |    1.128849    .1432457      0.96    0.340      .8802827     1.447602
     ip65c85 |    1.160951    .1520315      1.14    0.254      .8981429      1.50066
     ip65c86 |    1.103492    .1506463      0.72    0.471      .8444322     1.442026
     ip65c87 |    1.141157    .1215715      1.24    0.215      .9261132     1.406135
     ip65c88 |     1.01392    .1331152      0.11    0.916      .7838835     1.311463
     ip65c89 |    1.152861    .2084128      0.79    0.431       .808905      1.64307
     ip65c90 |    1.231977    .1562078      1.65    0.100      .9608934     1.579539
     ip65c91 |    1.044076    .1208296      0.37    0.709      .8321923     1.309907
     ip65c92 |    1.133139    .1529269      0.93    0.354      .8697738     1.476251
     ip65c93 |    1.101405    .1250652      0.85    0.395      .8816427     1.375946
     ip65c94 |    1.028486     .121314      0.24    0.812      .8161983     1.295988
     ip65c95 |    1.089442    .1178427      0.79    0.428      .8813156     1.346719
     ip65c96 |    1.052186    .1239661      0.43    0.666      .8352298     1.325498
     ip65c97 |    1.048879    .1283817      0.39    0.697      .8251618      1.33325
     ip65c98 |    1.026188    .1031471      0.26    0.797      .8426913     1.249641
     ip65c99 |    1.083588    .0855475      1.02    0.309      .9282465     1.264926
     ip56c00 |    1.375353    .1314697      3.33    0.001      1.140376     1.658747
     ip56c01 |    1.285813    .1023411      3.16    0.002      1.100091     1.502889
     ip56c02 |    1.375581    .1055164      4.16    0.000      1.183568     1.598745
     ip56c03 |    1.218979    .1277041      1.89    0.059      .9927082     1.496824
     ip56c04 |      1.2318    .1162618      2.21    0.027      1.023766     1.482107
     ip57c00 |    1.266441    .1847301      1.62    0.105      .9515337     1.685567
     ip57c01 |    1.102937    .0837233      1.29    0.197      .9504662     1.279868
     ip57c02 |    1.193152    .1198316      1.76    0.079      .9799572     1.452728
     ip57c03 |    1.383689    .1326055      3.39    0.001      1.146736     1.669602
     ip57c04 |    1.180928    .1358083      1.45    0.148      .9426145     1.479492
     ip58c00 |    .9383822    .1255313     -0.48    0.634      .7219564     1.219687
     ip58c01 |       1.154    .1207585      1.37    0.171      .9400118     1.416702
     ip58c02 |     .881042    .0771764     -1.45    0.148      .7420518     1.046066
     ip58c03 |    1.009577    .0874538      0.11    0.912      .8519313     1.196393
     ip58c04 |    1.061125    .0695992      0.90    0.366      .9331169     1.206693
     ip59c00 |    .8395297    .0738459     -1.99    0.047      .7065834     .9974902
     ip59c01 |    1.073377    .1269172      0.60    0.549      .8513441     1.353316
     ip59c02 |    .9853658    .1302383     -0.11    0.911      .7604874     1.276741
     ip59c03 |     1.05608    .1440513      0.40    0.689      .8083345     1.379756
     ip59c04 |    1.017966    .0589473      0.31    0.758      .9087462     1.140312
     ip60c00 |    1.045609    .1331906      0.35    0.726      .8145963     1.342134
     ip60c01 |     1.11734    .1238572      1.00    0.317      .8991443     1.388484
     ip60c02 |    1.147131    .1190812      1.32    0.186      .9359477     1.405965
     ip60c03 |    1.131414    .1311869      1.06    0.287      .9014161     1.420097
     ip60c04 |    1.174516    .0870854      2.17    0.030      1.015654     1.358226
     ip61c00 |    1.059125    .0674096      0.90    0.367      .9349129     1.199839
     ip61c01 |    1.016929    .0546396      0.31    0.755      .9152833     1.129863
     ip61c02 |    1.034153     .048042      0.72    0.470      .9441516     1.132733
     ip61c03 |    1.134321    .0679879      2.10    0.035      1.008596     1.275717
     ip61c04 |     1.10429    .0763049      1.44    0.151      .9644204     1.264445
     ip62c00 |    1.019866    .1071685      0.19    0.852      .8300378     1.253107
     ip62c01 |    1.199311    .0788775      2.76    0.006      1.054264     1.364315
     ip62c02 |    1.080371    .0511021      1.63    0.102      .9847154     1.185319
     ip62c03 |    1.064094     .058424      1.13    0.258       .955531     1.184991
     ip62c04 |    1.215187    .0989181      2.39    0.017      1.035986     1.425385
     ip63c00 |    1.023162    .0945218      0.25    0.804      .8537071     1.226253
     ip63c01 |    1.141234    .0919122      1.64    0.101      .9745884     1.336376
     ip63c02 |    1.103929    .1047071      1.04    0.297      .9166536     1.329466
     ip63c03 |    1.149338    .1081537      1.48    0.139      .9557606     1.382123
     ip63c04 |     1.13936    .0719056      2.07    0.039      1.006795     1.289379
     ip64c00 |    1.061914     .110074      0.58    0.562      .8666761     1.301133
     ip64c01 |    1.074897    .0811668      0.96    0.339      .9270254     1.246356
     ip64c02 |     1.11263    .0722995      1.64    0.101      .9795778     1.263754
     ip64c03 |    1.112414    .0695316      1.70    0.088      .9841518     1.257393
     ip64c04 |    1.125693      .05961      2.24    0.025      1.014718     1.248804
     ip65c00 |    1.016377      .07674      0.22    0.830      .8765695     1.178484
     ip65c01 |    1.041651    .1060929      0.40    0.689      .8531526     1.271797
     ip65c02 |    .9885436    .0734138     -0.16    0.877       .854637     1.143431
     ip65c03 |    1.034317    .0829168      0.42    0.674       .883927     1.210294
     ip65c04 |    1.001605    .0705515      0.02    0.982      .8724475     1.149884
 ia1journal2 |    .9399857    .0067012     -8.68    0.000       .926943      .953212
 ia1journal3 |    .8888922    .0111328     -9.40    0.000      .8673379     .9109821
 ia1journal4 |     .924954    .0076947     -9.38    0.000      .9099949      .940159
 ia1journal5 |    .9302082    .0079133     -8.50    0.000      .9148269      .945848
 ia1journal6 |    .8980899    .0051792    -18.64    0.000       .887996     .9082986
 ia1journal7 |    .9907209    .0033667     -2.74    0.006      .9841442     .9973416
 ia1journal8 |    .9980835    .0076133     -0.25    0.801      .9832726     1.013117
 ia1journal9 |    .9651733    .0124411     -2.75    0.006      .9410947      .989868
ia1journal10 |    .8119744    .0151175    -11.19    0.000      .7828788     .8421513
ia1journal11 |    1.062025    .0080536      7.94    0.000      1.046357     1.077928
ia1journal12 |    .9833872    .0040466     -4.07    0.000      .9754879     .9913506
ia1journal13 |    .9600921    .0072135     -5.42    0.000      .9460574      .974335
ia1journal14 |    1.062021    .0109443      5.84    0.000      1.040786     1.083689
ia1journal15 |    1.038445    .0071082      5.51    0.000      1.024606      1.05247
ia1journal16 |     .982829    .0154308     -1.10    0.270      .9530458     1.013543
ia1journal17 |    .9175506      .00486    -16.25    0.000      .9080744     .9271256
ia1journal18 |    .9726485    .0104365     -2.58    0.010      .9524069     .9933202
ia1journal19 |    .6928704    .0128752    -19.75    0.000      .6680894     .7185705
ia1journal20 |    .9890614     .004203     -2.59    0.010      .9808579     .9973335
ia1journal21 |     1.04451    .0089788      5.07    0.000       1.02706     1.062258
ia1journal22 |     1.09292    .0118024      8.23    0.000       1.07003     1.116298
ia1journal23 |     .827302    .0100336    -15.63    0.000      .8078683     .8472032
ia1journal24 |    .8046445    .0226951     -7.71    0.000      .7613701     .8503786
ia1journal26 |     1.00121    .0192355      0.06    0.950      .9642096     1.039629
ia1journal27 |    .8889843    .0078112    -13.39    0.000      .8738058     .9044266
ia1journal28 |    .9748525    .0121235     -2.05    0.041      .9513782      .998906
ia1journal29 |    .9286548    .0105541     -6.51    0.000      .9081978     .9495727
ia1journal30 |    1.092545     .032633      2.96    0.003      1.030422     1.158414
ia1journal31 |    .9682357    .0072225     -4.33    0.000      .9541828     .9824956
ia1journal32 |    .8563825    .0125662    -10.57    0.000      .8321041     .8813694
ia1journal33 |     1.10306    .0147871      7.32    0.000      1.074455     1.132426
ia1journal34 |     .947459     .005053    -10.12    0.000       .937607     .9574146
ia1journal35 |    1.480032    .0293656     19.76    0.000      1.423581     1.538721
ia1journal36 |    .8950458    .0207284     -4.79    0.000      .8553271      .936609
ia1journal37 |    1.063115    .0058988     11.03    0.000      1.051617      1.07474
ia1journal38 |     .966301    .0046803     -7.08    0.000      .9571712      .975518
ia1journal39 |    1.048517    .0074276      6.69    0.000       1.03406     1.063176
 ia2journal2 |    1.000677    .0000956      7.08    0.000      1.000489     1.000864
 ia2journal3 |    1.001901     .000229      8.31    0.000      1.001452      1.00235
 ia2journal4 |     1.00105    .0001546      6.79    0.000      1.000747     1.001353
 ia2journal5 |    1.001094     .000151      7.25    0.000      1.000798      1.00139
 ia2journal6 |    1.001094    .0000841     13.02    0.000      1.000929     1.001259
 ia2journal7 |    .9999926    .0000549     -0.13    0.893      .9998851       1.0001
 ia2journal8 |    .9998964    .0001108     -0.94    0.350      .9996793     1.000114
 ia2journal9 |    1.000719    .0002265      3.17    0.002      1.000275     1.001163
ia2journal10 |    1.003795    .0002936     12.95    0.000       1.00322     1.004371
ia2journal11 |    .9993905    .0001367     -4.46    0.000      .9991226     .9996585
ia2journal12 |    .9995149    .0000577     -8.40    0.000      .9994018     .9996281
ia2journal13 |    1.000367    .0001189      3.09    0.002      1.000134       1.0006
ia2journal14 |    .9989723    .0001751     -5.86    0.000      .9986291     .9993156
ia2journal15 |    .9986418    .0001147    -11.84    0.000       .998417     .9988666
ia2journal16 |    1.000171    .0002714      0.63    0.529      .9996391     1.000703
ia2journal17 |    1.000788    .0000744     10.59    0.000      1.000642     1.000933
ia2journal18 |    .9999755    .0001621     -0.15    0.880      .9996577     1.000293
ia2journal19 |    1.006577    .0003322     19.86    0.000      1.005926     1.007228
ia2journal20 |    1.000177    .0000662      2.67    0.008      1.000047     1.000307
ia2journal21 |    .9987384    .0001485     -8.49    0.000      .9984474     .9990295
ia2journal22 |    .9984498     .000182     -8.51    0.000      .9980931     .9988066
ia2journal23 |    1.003122    .0001898     16.48    0.000       1.00275     1.003494
ia2journal24 |    1.002021    .0004483      4.51    0.000      1.001142       1.0029
ia2journal26 |    .9991027    .0003737     -2.40    0.016      .9983706     .9998353
ia2journal27 |    1.001824    .0001639     11.14    0.000      1.001502     1.002145
ia2journal28 |    .9998737       .0002     -0.63    0.528      .9994819     1.000266
ia2journal29 |    1.000489    .0002032      2.41    0.016      1.000091     1.000887
ia2journal30 |    .9991858    .0004185     -1.94    0.052      .9983659     1.000006
ia2journal31 |     1.00028    .0001036      2.70    0.007      1.000077     1.000483
ia2journal32 |    1.002436    .0002719      8.97    0.000      1.001903     1.002969
ia2journal33 |    .9974851    .0002357    -10.66    0.000      .9970232     .9979472
ia2journal34 |    1.000141    .0000979      1.44    0.149      .9999495     1.000333
ia2journal35 |    .9859718    .0003759    -37.05    0.000      .9852352     .9867089
ia2journal36 |    1.000592    .0004163      1.42    0.155      .9997765     1.001408
ia2journal37 |    .9983791    .0001128    -14.36    0.000       .998158     .9986002
ia2journal38 |    .9999837    .0000857     -0.19    0.849      .9998156     1.000152
ia2journal39 |    .9991244    .0001133     -7.72    0.000      .9989023     .9993465
       d1c95 |    1.066229    .0475278      1.44    0.150      .9770298     1.163572
       d1c00 |    .9651223    .0466203     -0.73    0.462      .8779403     1.060962
       d2c95 |    1.003521    .0334283      0.11    0.916      .9400958     1.071225
       d2c00 |    1.072848    .0514634      1.47    0.143      .9765782     1.178608
-------------+----------------------------------------------------------------
Wald chi2(328) = -2.1e+16                                Prob > chi2 =   1.0000

.  * Column 5: Evans replication, with journal volume fixed effects, citation lags;
. xtpqml cit cit_lag d1c* d2c*, i(volume) irr fe cluster(journal);
note: 23 groups (575 obs) dropped because of all zero outcomes

Iteration 0:   log likelihood = -15823.932
Iteration 1:   log likelihood = -15015.247
Iteration 2:   log likelihood =  -15015.01
Iteration 3:   log likelihood =  -15015.01

Conditional fixed-effects Poisson regression    Number of obs     =      8,025
Group variable: volume                          Number of groups  =        321

                                                Obs per group:
                                                              min =         25
                                                              avg =       25.0
                                                              max =         25

                                                Wald chi2(5)      =    1586.21
Log likelihood  =  -15015.01                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     cit_lag |    .0125732    .0003205     39.23    0.000      .0119451     .0132013
       d1c95 |    .0310054    .0237973      1.30    0.193     -.0156363     .0776472
       d1c00 |   -.1153496    .0328636     -3.51    0.000      -.179761    -.0509382
       d2c95 |   -.0630001    .0167667     -3.76    0.000     -.0958623     -.030138
       d2c00 |   -.0074522    .0097219     -0.77    0.443     -.0265068     .0116023
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     cit_lag |    1.012653    .0016459      7.74    0.000      1.009432     1.015884
       d1c95 |    1.031491    .0364054      0.88    0.380      .9625498      1.10537
       d1c00 |    .8910546    .0463213     -2.22    0.026      .8047384      .986629
       d2c95 |    .9389433    .0130614     -4.53    0.000      .9136894     .9648953
       d2c00 |    .9925754    .0219046     -0.34    0.736      .9505584      1.03645
-------------+----------------------------------------------------------------
Wald chi2(5) =   278.66                                Prob > chi2 =   0.0000

. * Column 6: Combine citation lags with journal volumen fixed effects,
> * time effects, and age profiles;
.   xtpqml cit cit_lag ip* ia1j* ia2j* d1c* d2c*, i(volume) irr fe cluster(journal);
note: 23 groups (575 obs) dropped because of all zero outcomes
note: ip56c80 dropped because of collinearity
note: ip57c80 dropped because of collinearity
note: ip58c80 dropped because of collinearity
note: ip59c80 dropped because of collinearity
note: ip60c80 dropped because of collinearity
note: ip61c80 dropped because of collinearity
note: ip62c80 dropped because of collinearity
note: ip63c80 dropped because of collinearity
note: ip64c80 dropped because of collinearity
note: ip65c80 dropped because of collinearity
note: ia1journal25 dropped because of collinearity
note: ia2journal25 dropped because of collinearity

Iteration 0:   log likelihood = -15823.932
Iteration 1:   log likelihood = -14308.404
Iteration 2:   log likelihood = -14289.961
Iteration 3:   log likelihood = -14286.905
Iteration 4:   log likelihood = -14285.857
Iteration 5:   log likelihood = -14285.806
Iteration 6:   log likelihood = -14285.805

Conditional fixed-effects Poisson regression    Number of obs     =      8,025
Group variable: volume                          Number of groups  =        321

                                                Obs per group:
                                                              min =         25
                                                              avg =       25.0
                                                              max =         25

                                                Wald chi2(319)    =    3007.35
Log likelihood  = -14285.805                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     cit_lag |     .010956    .0004514     24.27    0.000      .0100713     .0118406
     ip56c81 |    .1230485    .1172701      1.05    0.294     -.1067967     .3528936
     ip56c82 |    .2622861    .1159875      2.26    0.024      .0349547     .4896175
     ip56c83 |    .2359135    .1160992      2.03    0.042      .0083633     .4634636
     ip56c84 |     .229802    .1167998      1.97    0.049      .0008785     .4587255
     ip56c85 |    .2451451    .1169462      2.10    0.036      .0159347     .4743555
     ip56c86 |    .3299114    .1161454      2.84    0.005      .1022706     .5575522
     ip56c87 |    .2470077    .1168923      2.11    0.035      .0179029     .4761124
     ip56c88 |    .2525655    .1174704      2.15    0.032      .0223277     .4828033
     ip56c89 |    .2993788    .1156209      2.59    0.010       .072766     .5259915
     ip56c90 |    .3179191    .1143477      2.78    0.005      .0938017     .5420365
     ip56c91 |    .1840447    .1160241      1.59    0.113     -.0433583     .4114478
     ip56c92 |    .3241908     .113039      2.87    0.004      .1026385     .5457431
     ip56c93 |    .4091731    .1092329      3.75    0.000      .1950806     .6232657
     ip56c94 |    .2848763    .1089004      2.62    0.009      .0714355     .4983171
     ip56c95 |    .3039226    .1081616      2.81    0.005      .0919298     .5159154
     ip56c96 |    .3856458    .1053539      3.66    0.000       .179156     .5921356
     ip56c97 |    .4062369    .1016713      4.00    0.000      .2069648     .6055089
     ip56c98 |    .1985571    .1025188      1.94    0.053     -.0023761     .3994904
     ip56c99 |    .2605202    .1010171      2.58    0.010      .0625304     .4585101
     ip57c81 |    .1579713    .1352801      1.17    0.243     -.1071729     .4231155
     ip57c82 |    .2609464     .134875      1.93    0.053     -.0034039     .5252966
     ip57c83 |    .3116087    .1344859      2.32    0.021      .0480213     .5751961
     ip57c84 |    .3060527    .1343274      2.28    0.023      .0427759     .5693295
     ip57c85 |     .341833    .1335102      2.56    0.010      .0801579     .6035081
     ip57c86 |    .2430942    .1359105      1.79    0.074     -.0232855      .509474
     ip57c87 |    .1794018    .1381079      1.30    0.194     -.0912847     .4500883
     ip57c88 |    .2080861    .1384026      1.50    0.133      -.063178     .4793501
     ip57c89 |    .1065802    .1398338      0.76    0.446     -.1674889     .3806494
     ip57c90 |    .2354861    .1371701      1.72    0.086     -.0333624     .5043346
     ip57c91 |    .2222482    .1371504      1.62    0.105     -.0465615      .491058
     ip57c92 |    .3110352    .1333286      2.33    0.020       .049716     .5723545
     ip57c93 |    .1542252    .1358472      1.14    0.256     -.1120303     .4204808
     ip57c94 |    .1321885    .1371716      0.96    0.335     -.1366628     .4010399
     ip57c95 |    .3791658    .1301135      2.91    0.004      .1241479     .6341836
     ip57c96 |    .1013361    .1347836      0.75    0.452     -.1628349     .3655071
     ip57c97 |    .2673801    .1305291      2.05    0.041      .0115479     .5232124
     ip57c98 |     .225393    .1292322      1.74    0.081     -.0278976     .4786835
     ip57c99 |    .0398478    .1326451      0.30    0.764     -.2201319     .2998275
     ip58c81 |    .1091899    .1017103      1.07    0.283     -.0901585     .3085383
     ip58c82 |   -.0000684    .1031889     -0.00    0.999     -.2023148      .202178
     ip58c83 |    .0885304    .1022448      0.87    0.387     -.1118658     .2889266
     ip58c84 |    .1130482    .1019469      1.11    0.267      -.086764     .3128604
     ip58c85 |    .0370265    .1029332      0.36    0.719     -.1647189     .2387718
     ip58c86 |    .2389366    .1010254      2.37    0.018      .0409304     .4369427
     ip58c87 |    .0243456     .103077      0.24    0.813     -.1776817     .2263729
     ip58c88 |    .1227991    .1022649      1.20    0.230     -.0776363     .3232346
     ip58c89 |    -.254691    .1086089     -2.35    0.019     -.4675605    -.0418215
     ip58c90 |     .082929    .1044902      0.79    0.427      -.121868      .287726
     ip58c91 |    -.019878    .1047441     -0.19    0.849     -.2251727     .1854167
     ip58c92 |    .1196462    .1015847      1.18    0.239     -.0794563     .3187486
     ip58c93 |    .0190014    .1019785      0.19    0.852     -.1808729     .2188756
     ip58c94 |    .1976979    .0989207      2.00    0.046      .0038168      .391579
     ip58c95 |    .0350301    .1002485      0.35    0.727     -.1614533     .2315134
     ip58c96 |   -.0667279    .1022616     -0.65    0.514      -.267157     .1337012
     ip58c97 |    .1234817    .0983407      1.26    0.209     -.0692626      .316226
     ip58c98 |     .014147    .0989438      0.14    0.886     -.1797793     .2080733
     ip58c99 |   -.0824879    .1005327     -0.82    0.412     -.2795285     .1145526
     ip59c81 |     .249601    .1196457      2.09    0.037      .0150997     .4841022
     ip59c82 |    .0595638    .1244956      0.48    0.632     -.1844431     .3035708
     ip59c83 |    .2475223    .1216673      2.03    0.042      .0090588     .4859858
     ip59c84 |    .2962657    .1203691      2.46    0.014      .0603466     .5321847
     ip59c85 |    .1566753     .122834      1.28    0.202      -.084075     .3974255
     ip59c86 |    .2194603    .1226253      1.79    0.074     -.0208808     .4598014
     ip59c87 |    .0266123    .1273409      0.21    0.834     -.2229713     .2761959
     ip59c88 |    .1755964    .1249306      1.41    0.160     -.0692631     .4204559
     ip59c89 |    .0203515    .1277353      0.16    0.873     -.2300051     .2707081
     ip59c90 |   -.0063341    .1289511     -0.05    0.961     -.2590736     .2464054
     ip59c91 |    .0560874    .1275509      0.44    0.660     -.1939077     .3060826
     ip59c92 |    .0061297    .1284311      0.05    0.962     -.2455908     .2578501
     ip59c93 |    .0041602    .1283698      0.03    0.974     -.2474401     .2557605
     ip59c94 |    .1254132    .1248639      1.00    0.315     -.1193155     .3701419
     ip59c95 |    .1123038    .1244018      0.90    0.367     -.1315192     .3561268
     ip59c96 |   -.0650112    .1273721     -0.51    0.610     -.3146559     .1846335
     ip59c97 |    .0824011    .1234666      0.67    0.505     -.1595891     .3243912
     ip59c98 |    .1876264    .1197488      1.57    0.117     -.0470768     .4223297
     ip59c99 |   -.0646845    .1251945     -0.52    0.605     -.3100613     .1806923
     ip60c81 |    .1263306    .1076373      1.17    0.241     -.0846347     .3372959
     ip60c82 |    .2223533    .1053085      2.11    0.035      .0159525     .4287541
     ip60c83 |    .1626212    .1062226      1.53    0.126     -.0455714     .3708137
     ip60c84 |    .1461954    .1070482      1.37    0.172     -.0636151     .3560059
     ip60c85 |    .3536278    .1045567      3.38    0.001      .1487006     .5585551
     ip60c86 |      .08639     .107098      0.81    0.420     -.1235183     .2962983
     ip60c87 |    .0336561    .1094558      0.31    0.758     -.1808733     .2481856
     ip60c88 |    .2188238    .1075856      2.03    0.042      .0079599     .4296878
     ip60c89 |    .0874573    .1078264      0.81    0.417     -.1238785     .2987931
     ip60c90 |    .1297335    .1080289      1.20    0.230     -.0819991     .3414662
     ip60c91 |    .2424412    .1054608      2.30    0.022      .0357419     .4491406
     ip60c92 |    .1642573    .1047513      1.57    0.117     -.0410515     .3695661
     ip60c93 |    .1412314    .1041069      1.36    0.175     -.0628144     .3452773
     ip60c94 |    .1293135    .1029068      1.26    0.209     -.0723802     .3310073
     ip60c95 |    .1044161    .1014689      1.03    0.303     -.0944592     .3032914
     ip60c96 |    .2610458     .098617      2.65    0.008      .0677599     .4543316
     ip60c97 |    -.054733    .0999062     -0.55    0.584     -.2505456     .1410796
     ip60c98 |    .2264651    .0960072      2.36    0.018      .0382943     .4146358
     ip60c99 |    .1199138    .0948456      1.26    0.206     -.0659801     .3058077
     ip61c81 |   -.0170685    .0933199     -0.18    0.855     -.1999721      .165835
     ip61c82 |    .0717113    .0923107      0.78    0.437     -.1092143     .2526369
     ip61c83 |    .1113004    .0911419      1.22    0.222     -.0673344     .2899353
     ip61c84 |     .135575    .0903296      1.50    0.133     -.0414676     .3126177
     ip61c85 |    .1349484    .0902314      1.50    0.135      -.041902     .3117987
     ip61c86 |    .1946786    .0892144      2.18    0.029      .0198216     .3695357
     ip61c87 |   -.0088008    .0923926     -0.10    0.924     -.1898871     .1722854
     ip61c88 |    .1782536    .0913448      1.95    0.051     -.0007789     .3572862
     ip61c89 |    .1645106    .0908274      1.81    0.070     -.0135078     .3425291
     ip61c90 |    .0738551    .0922685      0.80    0.423     -.1069879     .2546981
     ip61c91 |    .2133311    .0907831      2.35    0.019      .0353994     .3912628
     ip61c92 |    .1094182    .0917999      1.19    0.233     -.0705064     .2893427
     ip61c93 |    .2360577    .0896935      2.63    0.008      .0602616     .4118538
     ip61c94 |    .0847579    .0912169      0.93    0.353     -.0940239     .2635398
     ip61c95 |    .1984137    .0899988      2.20    0.027      .0220193      .374808
     ip61c96 |    .0542045    .0918293      0.59    0.555     -.1257776     .2341866
     ip61c97 |     .117926    .0899557      1.31    0.190     -.0583839     .2942358
     ip61c98 |    .1282088    .0895541      1.43    0.152     -.0473141     .3037317
     ip61c99 |    .0199318    .0903047      0.22    0.825     -.1570622     .1969258
     ip62c81 |    .1966547    .1023789      1.92    0.055     -.0040043     .3973136
     ip62c82 |    .4273188    .0988751      4.32    0.000      .2335272     .6211104
     ip62c83 |    .1844203    .1003473      1.84    0.066     -.0122567     .3810974
     ip62c84 |     .473789    .0977783      4.85    0.000       .282147     .6654309
     ip62c85 |    .3036509    .0988436      3.07    0.002       .109921     .4973808
     ip62c86 |    .2645837    .0994527      2.66    0.008        .06966     .4595075
     ip62c87 |    .3582767     .099675      3.59    0.000      .1629173     .5536362
     ip62c88 |    .2464182    .1011474      2.44    0.015       .048173     .4446635
     ip62c89 |    .2812001     .100638      2.79    0.005      .0839532      .478447
     ip62c90 |    .1895166    .1021454      1.86    0.064     -.0106847     .3897179
     ip62c91 |    .3832426    .0997016      3.84    0.000       .187831     .5786542
     ip62c92 |    .1105852    .1028442      1.08    0.282     -.0909857     .3121562
     ip62c93 |     .438443    .0990749      4.43    0.000      .2442597     .6326262
     ip62c94 |    .1272862    .1013577      1.26    0.209     -.0713713     .3259437
     ip62c95 |    .2142083    .1013533      2.11    0.035      .0155594     .4128571
     ip62c96 |    .2036617    .1006529      2.02    0.043      .0063856     .4009377
     ip62c97 |    .1207966     .102132      1.18    0.237     -.0793785     .3209716
     ip62c98 |    .2239702    .1004048      2.23    0.026      .0271804       .42076
     ip62c99 |     .161322    .1006303      1.60    0.109     -.0359098     .3585538
     ip63c81 |    .1613765     .092918      1.74    0.082     -.0207394     .3434924
     ip63c82 |    .1468278    .0926732      1.58    0.113     -.0348084      .328464
     ip63c83 |     .258783    .0907296      2.85    0.004      .0809561     .4366098
     ip63c84 |    .1780427    .0902502      1.97    0.049      .0011556     .3549299
     ip63c85 |    .3201066     .088943      3.60    0.000      .1457816     .4944316
     ip63c86 |    .0284742    .0923187      0.31    0.758     -.1524672     .2094156
     ip63c87 |    .1660881     .090316      1.84    0.066     -.0109281     .3431042
     ip63c88 |     .070502    .0916865      0.77    0.442     -.1092002     .2502043
     ip63c89 |    .0213431    .0930442      0.23    0.819     -.1610201     .2037063
     ip63c90 |    .1279954    .0929854      1.38    0.169     -.0542525     .3102434
     ip63c91 |    .2007595    .0908977      2.21    0.027      .0226032     .3789158
     ip63c92 |    .2354804     .089165      2.64    0.008      .0607203     .4102406
     ip63c93 |   -.0709824    .0929044     -0.76    0.445     -.2530717      .111107
     ip63c94 |    .1453988    .0912923      1.59    0.111     -.0335309     .3243285
     ip63c95 |   -.0183626    .0926198     -0.20    0.843     -.1998942     .1631689
     ip63c96 |    .2239037    .0890977      2.51    0.012      .0492754     .3985319
     ip63c97 |    .0608998    .0894959      0.68    0.496      -.114509     .2363085
     ip63c98 |    .1101555    .0889724      1.24    0.216     -.0642272     .2845381
     ip63c99 |    .1544695    .0882439      1.75    0.080     -.0184855     .3274245
     ip64c81 |     .180319    .0961492      1.88    0.061     -.0081301      .368768
     ip64c82 |    .2320654    .0944608      2.46    0.014      .0469256     .4172052
     ip64c83 |    .4112359    .0910242      4.52    0.000      .2328318     .5896401
     ip64c84 |    .2500359    .0908798      2.75    0.006      .0719147     .4281571
     ip64c85 |    .3300884    .0896888      3.68    0.000      .1543017     .5058752
     ip64c86 |    .2091912    .0909135      2.30    0.021       .031004     .3873784
     ip64c87 |    .2477809    .0904274      2.74    0.006      .0705465     .4250152
     ip64c88 |     .138093    .0921642      1.50    0.134     -.0425456     .3187315
     ip64c89 |    .0608297    .0936516      0.65    0.516      -.122724     .2443833
     ip64c90 |    .3239951    .0900487      3.60    0.000      .1475028     .5004873
     ip64c91 |    .2450142     .090291      2.71    0.007      .0680471     .4219814
     ip64c92 |    .0781453    .0928705      0.84    0.400     -.1038776     .2601681
     ip64c93 |   -.0104293    .0951871     -0.11    0.913     -.1969926      .176134
     ip64c94 |     .182736    .0922045      1.98    0.047      .0020186     .3634534
     ip64c95 |    .1515603    .0918546      1.65    0.099     -.0284713     .3315919
     ip64c96 |    .1696187     .091368      1.86    0.063     -.0094593     .3486968
     ip64c97 |    .1099171    .0912702      1.20    0.228     -.0689692     .2888034
     ip64c98 |    .0639406    .0918497      0.70    0.486     -.1160815     .2439626
     ip64c99 |    .1510376    .0902782      1.67    0.094     -.0259045     .3279797
     ip65c81 |    .1515492    .0916224      1.65    0.098     -.0280274     .3311258
     ip65c82 |    .1190435    .0894404      1.33    0.183     -.0562565     .2943434
     ip65c83 |    .1097444    .0876825      1.25    0.211     -.0621102      .281599
     ip65c84 |    .0968608    .0861676      1.12    0.261     -.0720246     .2657461
     ip65c85 |     .144551    .0847318      1.71    0.088     -.0215204     .3106224
     ip65c86 |    .1032032    .0842694      1.22    0.221     -.0619618     .2683682
     ip65c87 |    .1278748    .0832263      1.54    0.124     -.0352457     .2909952
     ip65c88 |   -.0030458      .08434     -0.04    0.971     -.1683491     .1622576
     ip65c89 |    .1743439    .0822668      2.12    0.034      .0131039     .3355838
     ip65c90 |    .1882006    .0811355      2.32    0.020      .0291779     .3472233
     ip65c91 |   -.0051161    .0832161     -0.06    0.951     -.1682167     .1579846
     ip65c92 |    .1398158    .0818527      1.71    0.088     -.0206126     .3002442
     ip65c93 |    .0919923    .0821331      1.12    0.263     -.0689855     .2529702
     ip65c94 |    .0221326    .0830343      0.27    0.790     -.1406117     .1848769
     ip65c95 |    .1063326    .0820016      1.30    0.195     -.0543875     .2670527
     ip65c96 |    .0409223    .0823033      0.50    0.619     -.1203891     .2022337
     ip65c97 |    .0383445    .0817467      0.47    0.639     -.1218761     .1985652
     ip65c98 |    .0276395     .081734      0.34    0.735     -.1325562     .1878352
     ip65c99 |    .0817993    .0808562      1.01    0.312      -.076676     .2402745
     ip56c00 |    .4354114    .0879606      4.95    0.000      .2630117      .607811
     ip56c01 |    .2167704    .0871412      2.49    0.013      .0459767     .3875641
     ip56c02 |    .3226017    .0838045      3.85    0.000      .1583478     .4868556
     ip56c03 |    .2034389    .0844606      2.41    0.016      .0378991     .3689786
     ip56c04 |    .2161044    .0830402      2.60    0.009      .0533487     .3788601
     ip57c00 |    .2765951    .1207867      2.29    0.022      .0398575     .5133326
     ip57c01 |    .1020528    .1236057      0.83    0.409     -.1402099     .3443154
     ip57c02 |    .1950493      .11968      1.63    0.103     -.0395192     .4296177
     ip57c03 |    .2924349    .1149719      2.54    0.011      .0670941     .5177756
     ip57c04 |    .0930166    .1184033      0.79    0.432     -.1390495     .3250827
     ip58c00 |    .0245866    .0905771      0.27    0.786     -.1529414     .2021145
     ip58c01 |    .1961866    .0852372      2.30    0.021      .0291247     .3632485
     ip58c02 |   -.1385927    .0889723     -1.56    0.119     -.3129752     .0357899
     ip58c03 |    .0987508    .0852027      1.16    0.246     -.0682435     .2657451
     ip58c04 |    .0885096      .08368      1.06    0.290     -.0755003     .2525194
     ip59c00 |   -.1313897    .1229375     -1.07    0.285     -.3723428     .1095634
     ip59c01 |    .1145695    .1146959      1.00    0.318     -.1102304     .3393694
     ip59c02 |   -.0057233    .1148546     -0.05    0.960     -.2308342     .2193876
     ip59c03 |    .0618365    .1122317      0.55    0.582     -.1581336     .2818065
     ip59c04 |    .0217429    .1126779      0.19    0.847     -.1991018     .2425876
     ip60c00 |    .0204046     .091675      0.22    0.824     -.1592751     .2000842
     ip60c01 |     .148727      .08845      1.68    0.093     -.0246319     .3220859
     ip60c02 |    .1508169    .0850792      1.77    0.076     -.0159352      .317569
     ip60c03 |    .0984805    .0841623      1.17    0.242     -.0664746     .2634355
     ip60c04 |    .0979808    .0833265      1.18    0.240     -.0653361     .2612977
     ip61c00 |    .1815642    .0786202      2.31    0.021      .0274715      .335657
     ip61c01 |    .0967866    .0784719      1.23    0.217     -.0570155     .2505888
     ip61c02 |     .121613    .0767426      1.58    0.113     -.0287997     .2720258
     ip61c03 |    .1961921    .0741009      2.65    0.008      .0509571     .3414272
     ip61c04 |    .1318612    .0737712      1.79    0.074     -.0127277     .2764501
     ip62c00 |    .1882192    .0928767      2.03    0.043      .0061842     .3702542
     ip62c01 |    .3415356     .088884      3.84    0.000      .1673262      .515745
     ip62c02 |    .1194853    .0894314      1.34    0.182      -.055797     .2947676
     ip62c03 |     .152861    .0892417      1.71    0.087     -.0220495     .3277714
     ip62c04 |    .2813007    .0860699      3.27    0.001      .1126068     .4499946
     ip63c00 |    .1016186    .0809572      1.26    0.209     -.0570546     .2602917
     ip63c01 |    .2341917    .0788498      2.97    0.003      .0796491     .3887344
     ip63c02 |     .148425    .0773667      1.92    0.055      -.003211      .300061
     ip63c03 |    .2263158    .0764166      2.96    0.003       .076542     .3760896
     ip63c04 |    .1602366    .0763096      2.10    0.036      .0106726     .3098007
     ip64c00 |    .1203815    .0832811      1.45    0.148     -.0428464     .2836094
     ip64c01 |    .1178283    .0825179      1.43    0.153     -.0439039     .2795604
     ip64c02 |    .1358366    .0800466      1.70    0.090     -.0210519     .2927251
     ip64c03 |    .1188575    .0793571      1.50    0.134     -.0366796     .2743946
     ip64c04 |    .1375252    .0785367      1.75    0.080     -.0164038     .2914543
     ip65c00 |    .0054784    .0729447      0.08    0.940     -.1374906     .1484474
     ip65c01 |    .0442124    .0722956      0.61    0.541     -.0974843     .1859092
     ip65c02 |   -.0006644    .0715752     -0.01    0.993     -.1409492     .1396204
     ip65c03 |    .0451148    .0704695      0.64    0.522     -.0930029     .1832326
     ip65c04 |    .0002219    .0707973      0.00    0.997     -.1385383      .138982
 ia1journal2 |   -.0211578    .0157364     -1.34    0.179     -.0520006      .009685
 ia1journal3 |   -.0874543    .0207061     -4.22    0.000     -.1280376     -.046871
 ia1journal4 |   -.0453601     .019639     -2.31    0.021     -.0838518    -.0068683
 ia1journal5 |   -.0263699    .0158998     -1.66    0.097      -.057533     .0047931
 ia1journal6 |   -.1720701    .0737975     -2.33    0.020     -.3167106    -.0274297
 ia1journal7 |   -.0258223    .0368721     -0.70    0.484     -.0980902     .0464456
 ia1journal8 |    .0052391    .0240275      0.22    0.827      -.041854     .0523322
 ia1journal9 |   -.0607595    .0216772     -2.80    0.005     -.1032461    -.0182728
ia1journal10 |   -.1355445    .0272423     -4.98    0.000     -.1889383    -.0821506
ia1journal11 |    .0461741     .026021      1.77    0.076     -.0048261     .0971744
ia1journal12 |    -.001135    .0372165     -0.03    0.976     -.0740781     .0718081
ia1journal13 |   -.0250609    .0277743     -0.90    0.367     -.0794977     .0293758
ia1journal14 |    .0603708    .0356079      1.70    0.090     -.0094195      .130161
ia1journal15 |    .0389595    .0445343      0.87    0.382      -.048326      .126245
ia1journal16 |     .038322    .1353516      0.28    0.777     -.2269622     .3036063
ia1journal17 |   -.0869254    .0221008     -3.93    0.000     -.1302421    -.0436087
ia1journal18 |   -.0945863    .1081836     -0.87    0.382     -.3066223     .1174497
ia1journal19 |   -.2014724     .203267     -0.99    0.322     -.5998684     .1969236
ia1journal20 |   -.0148279    .0171023     -0.87    0.386     -.0483477      .018692
ia1journal21 |    .0964054    .0652431      1.48    0.140     -.0314687     .2242795
ia1journal22 |    .0288386      .19393      0.15    0.882     -.3512572     .4089344
ia1journal23 |   -.2553035    .1064098     -2.40    0.016     -.4638629    -.0467442
ia1journal24 |   -.2068605    .3048571     -0.68    0.497     -.8043694     .3906483
ia1journal26 |    .1035384    .2378175      0.44    0.663     -.3625753      .569652
ia1journal27 |   -.1129766    .0244117     -4.63    0.000     -.1608225    -.0651306
ia1journal28 |    .0191297    .0999715      0.19    0.848     -.1768108     .2150703
ia1journal29 |   -.0236544    .0531381     -0.45    0.656      -.127803     .0804943
ia1journal30 |    .0267585    .0304432      0.88    0.379     -.0329091     .0864261
ia1journal31 |   -.0558458    .0325084     -1.72    0.086     -.1195611     .0078696
ia1journal32 |   -.1352487    .0467642     -2.89    0.004     -.2269049    -.0435926
ia1journal33 |    .0879607    .1209375      0.73    0.467     -.1490724     .3249938
ia1journal34 |   -.0789466    .0503163     -1.57    0.117     -.1775647     .0196715
ia1journal35 |    1.335991    .7568473      1.77    0.078     -.1474027     2.819384
ia1journal36 |    -.184209    .2434588     -0.76    0.449     -.6613794     .2929615
ia1journal37 |     .091063    .0888568      1.02    0.305      -.083093     .2652191
ia1journal38 |   -.0461505     .030056     -1.54    0.125     -.1050592     .0127583
ia1journal39 |    .0677076    .0769347      0.88    0.379     -.0830816     .2184969
 ia2journal2 |     .000279    .0002426      1.15    0.250     -.0001964     .0007545
 ia2journal3 |    .0013507    .0003134      4.31    0.000      .0007364     .0019649
 ia2journal4 |    .0006246    .0003059      2.04    0.041      .0000251     .0012241
 ia2journal5 |    .0003943    .0002454      1.61    0.108     -.0000866     .0008752
 ia2journal6 |    .0020622    .0011826      1.74    0.081     -.0002556       .00438
 ia2journal7 |    .0003187    .0005867      0.54    0.587     -.0008312     .0014685
 ia2journal8 |   -.0001467    .0003923     -0.37    0.708     -.0009156     .0006221
 ia2journal9 |    .0010497    .0003385      3.10    0.002      .0003863     .0017131
ia2journal10 |     .002462    .0004397      5.60    0.000      .0016002     .0033237
ia2journal11 |   -.0004753    .0004166     -1.14    0.254     -.0012917     .0003411
ia2journal12 |   -.0006263    .0005897     -1.06    0.288     -.0017821     .0005296
ia2journal13 |    .0002247    .0004331      0.52    0.604     -.0006241     .0010736
ia2journal14 |   -.0009393    .0005798     -1.62    0.105     -.0020758     .0001971
ia2journal15 |   -.0012807    .0007222     -1.77    0.076     -.0026962     .0001348
ia2journal16 |   -.0006465    .0022326     -0.29    0.772     -.0050222     .0037293
ia2journal17 |    .0009558     .000343      2.79    0.005      .0002836      .001628
ia2journal18 |     .001025    .0017959      0.57    0.568      -.002495      .004545
ia2journal19 |    .0039031    .0033962      1.15    0.250     -.0027534     .0105596
ia2journal20 |    .0002822    .0002669      1.06    0.290     -.0002409     .0008053
ia2journal21 |   -.0019735    .0010398     -1.90    0.058     -.0040115     .0000645
ia2journal22 |   -.0005917    .0030848     -0.19    0.848     -.0066377     .0054543
ia2journal23 |    .0041567    .0017121      2.43    0.015       .000801     .0075124
ia2journal24 |    .0018801    .0044594      0.42    0.673     -.0068602     .0106203
ia2journal26 |   -.0025692    .0042334     -0.61    0.544     -.0108664     .0057281
ia2journal27 |    .0017744    .0003858      4.60    0.000      .0010183     .0025305
ia2journal28 |   -.0008028    .0016667     -0.48    0.630     -.0040695     .0024639
ia2journal29 |   -.0002345    .0009117     -0.26    0.797     -.0020213     .0015523
ia2journal30 |   -.0003255    .0004594     -0.71    0.479     -.0012259     .0005748
ia2journal31 |       .0007    .0005094      1.37    0.169     -.0002984     .0016983
ia2journal32 |     .002146    .0008208      2.61    0.009      .0005373     .0037548
ia2journal33 |   -.0023572    .0020425     -1.15    0.248     -.0063604     .0016461
ia2journal34 |    .0006214    .0008193      0.76    0.448     -.0009843     .0022271
ia2journal35 |   -.0342533    .0164675     -2.08    0.038      -.066529    -.0019776
ia2journal36 |    .0019386    .0041664      0.47    0.642     -.0062273     .0101046
ia2journal37 |   -.0020602    .0014242     -1.45    0.148     -.0048515     .0007311
ia2journal38 |    .0002262    .0004808      0.47    0.638     -.0007162     .0011686
ia2journal39 |   -.0011162    .0011956     -0.93    0.350     -.0034595      .001227
       d1c95 |    .0798263    .0331777      2.41    0.016      .0147992     .1448534
       d1c00 |   -.0431477    .0457029     -0.94    0.345     -.1327238     .0464283
       d2c95 |    .0100021    .0271215      0.37    0.712     -.0431552     .0631593
       d2c00 |    .0541537    .0368039      1.47    0.141     -.0179807     .1262881
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     cit_lag |    1.011016    .0016353      6.77    0.000      1.007816     1.014226
     ip56c81 |    1.130939    .1551288      0.90    0.370      .8643339      1.47978
     ip56c82 |    1.299898    .1992294      1.71    0.087      .9626086     1.755372
     ip56c83 |    1.266065    .1585803      1.88    0.060       .990465     1.618351
     ip56c84 |    1.258351    .1371489      2.11    0.035      1.016315     1.558027
     ip56c85 |    1.277807    .1846316      1.70    0.090      .9626627     1.696118
     ip56c86 |    1.390845    .1931172      2.38    0.017      1.059474     1.825858
     ip56c87 |    1.280189    .1470264      2.15    0.031      1.022153     1.603365
     ip56c88 |    1.287324    .1426789      2.28    0.023      1.035967     1.599667
     ip56c89 |     1.34902    .2105944      1.92    0.055      .9934322     1.831888
     ip56c90 |    1.374265    .1524587      2.87    0.004      1.105706     1.708053
     ip56c91 |     1.20207    .1307367      1.69    0.091      .9712996     1.487668
     ip56c92 |    1.382911    .1340733      3.34    0.001       1.14359     1.672316
     ip56c93 |    1.505572    .1993299      3.09    0.002      1.161467     1.951624
     ip56c94 |    1.329598    .1421665      2.66    0.008      1.078216     1.639587
     ip56c95 |    1.355164    .1166864      3.53    0.000       1.14472     1.604296
     ip56c96 |    1.470564     .173826      3.26    0.001      1.166457     1.853954
     ip56c97 |    1.501158    .1718049      3.55    0.000      1.199521     1.878646
     ip56c98 |    1.219642    .0981704      2.47    0.014      1.041641      1.42806
     ip56c99 |    1.297605    .1197566      2.82    0.005      1.082891     1.554892
     ip57c81 |    1.171133    .2659905      0.70    0.487      .7503763     1.827818
     ip57c82 |    1.298158    .2772639      1.22    0.222      .8541335      1.97301
     ip57c83 |     1.36562    .2246306      1.89    0.058      .9892726     1.885141
     ip57c84 |    1.358054    .2071181      2.01    0.045      1.007162     1.831195
     ip57c85 |    1.407525    .2169556      2.22    0.027      1.040524      1.90397
     ip57c86 |    1.275189    .2130523      1.45    0.146      .9190939      1.76925
     ip57c87 |    1.196501    .2654534      0.81    0.419      .7745819     1.848243
     ip57c88 |    1.231319    .1871625      1.37    0.171      .9140851     1.658649
     ip57c89 |    1.112467    .1680372      0.71    0.480      .8273971     1.495755
     ip57c90 |    1.265524    .2699218      1.10    0.270      .8331413     1.922303
     ip57c91 |    1.248881    .1272452      2.18    0.029      1.022809     1.524923
     ip57c92 |    1.364837    .1747378      2.43    0.015      1.061947     1.754118
     ip57c93 |    1.166754    .1788971      1.01    0.314      .8639037     1.575771
     ip57c94 |    1.141323    .1095501      1.38    0.168       .945597     1.377563
     ip57c95 |    1.461065    .1753584      3.16    0.002      1.154802     1.848552
     ip57c96 |    1.106649    .1292021      0.87    0.385      .8803011     1.391196
     ip57c97 |    1.306537    .1082134      3.23    0.001      1.110763     1.536817
     ip57c98 |    1.252815    .1090796      2.59    0.010       1.05627     1.485932
     ip57c99 |    1.040652    .1137734      0.36    0.716      .8399332     1.289338
     ip58c81 |    1.115374    .1179799      1.03    0.302      .9065334     1.372326
     ip58c82 |    .9999316    .1006462     -0.00    0.999      .8209075     1.217997
     ip58c83 |    1.092567    .1240775      0.78    0.436      .8745437     1.364945
     ip58c84 |    1.119686    .1067185      1.19    0.236      .9288964     1.349663
     ip58c85 |     1.03772     .147837      0.26    0.795      .7849021     1.371972
     ip58c86 |    1.269898    .1362108      2.23    0.026      1.029124     1.567003
     ip58c87 |    1.024644     .077689      0.32    0.748      .8831504     1.188808
     ip58c88 |    1.130657    .1234331      1.12    0.261      .9128635     1.400413
     ip58c89 |     .775156    .0816846     -2.42    0.016      .6305086     .9529876
     ip58c90 |    1.086465    .0915452      0.98    0.325      .9210721     1.281556
     ip58c91 |    .9803183    .0804592     -0.24    0.809      .8346513     1.151408
     ip58c92 |    1.127098    .0914051      1.48    0.140      .9614598     1.321272
     ip58c93 |    1.019183    .1220033      0.16    0.874      .8060416     1.288686
     ip58c94 |    1.218594    .1516382      1.59    0.112      .9548567     1.555178
     ip58c95 |    1.035651    .1210286      0.30    0.764      .8236448     1.302227
     ip58c96 |    .9354497    .1068601     -0.58    0.559      .7477981      1.17019
     ip58c97 |    1.131429    .1051009      1.33    0.184      .9430994     1.357367
     ip58c98 |    1.014248    .0850277      0.17    0.866      .8605675     1.195372
     ip58c99 |    .9208225    .1133922     -0.67    0.503      .7233643     1.172181
     ip59c81 |    1.283513    .1830077      1.75    0.080      .9705839     1.697335
     ip59c82 |    1.061374    .1586509      0.40    0.690      .7918324     1.422667
     ip59c83 |    1.280848    .1651954      1.92    0.055      .9947528     1.649225
     ip59c84 |    1.344827    .1309983      3.04    0.002      1.111097     1.627726
     ip59c85 |    1.169616    .1580375      1.16    0.246      .8974899     1.524252
     ip59c86 |    1.245404    .1642518      1.66    0.096      .9617198     1.612769
     ip59c87 |     1.02697    .1263686      0.22    0.829      .8068954     1.307067
     ip59c88 |    1.191957    .1811264      1.16    0.248       .884941     1.605487
     ip59c89 |     1.02056    .1663229      0.12    0.901       .741509     1.404626
     ip59c90 |    .9936859    .1480743     -0.04    0.966      .7420056     1.330734
     ip59c91 |     1.05769    .1305721      0.45    0.650       .830381     1.347223
     ip59c92 |    1.006148    .1077601      0.06    0.954      .8156372     1.241158
     ip59c93 |    1.004169    .1137087      0.04    0.971      .8043027     1.253701
     ip59c94 |    1.133617     .154871      0.92    0.359       .867317     1.481681
     ip59c95 |    1.118853    .0815561      1.54    0.123      .9698993     1.290682
     ip59c96 |     .937057    .1139467     -0.53    0.593      .7383451     1.189248
     ip59c97 |    1.085891    .1067711      0.84    0.402      .8955529     1.316683
     ip59c98 |    1.206383    .1728058      1.31    0.190        .91108       1.5974
     ip59c99 |    .9373632    .1296384     -0.47    0.640      .7148019     1.229221
     ip60c81 |    1.134657    .1565471      0.92    0.360      .8658159     1.486975
     ip60c82 |    1.249013    .2110288      1.32    0.188       .896914     1.739333
     ip60c83 |    1.176591    .1843683      1.04    0.299      .8654555     1.599581
     ip60c84 |    1.157422    .1945853      0.87    0.385      .8325077     1.609146
     ip60c85 |    1.424225    .1613563      3.12    0.002      1.140624      1.77834
     ip60c86 |    1.090231    .1362708      0.69    0.489      .8533454     1.392876
     ip60c87 |    1.034229    .1631216      0.21    0.831      .7592113     1.408869
     ip60c88 |    1.244612    .1401189      1.94    0.052       .998172     1.551896
     ip60c89 |    1.091396    .1533491      0.62    0.534      .8286711     1.437415
     ip60c90 |    1.138525    .1213137      1.22    0.223      .9239408     1.402946
     ip60c91 |    1.274356    .1681291      1.84    0.066      .9839878     1.650411
     ip60c92 |    1.178518    .1319245      1.47    0.142      .9463497     1.467643
     ip60c93 |    1.151691    .1714806      0.95    0.343      .8601946     1.541968
     ip60c94 |    1.138047    .1062488      1.39    0.166      .9477449      1.36656
     ip60c95 |    1.110062    .1258517      0.92    0.357      .8888811      1.38628
     ip60c96 |    1.298287    .1386549      2.44    0.015      1.053086     1.600581
     ip60c97 |    .9467379    .0986548     -0.53    0.599      .7718453     1.161259
     ip60c98 |    1.254159    .0905963      3.14    0.002       1.08859     1.444909
     ip60c99 |      1.1274    .1338158      1.01    0.312      .8933985     1.422691
     ip61c81 |    .9830763    .0913899     -0.18    0.854      .8193262     1.179553
     ip61c82 |    1.074345     .067159      1.15    0.251      .9504601     1.214378
     ip61c83 |    1.117731    .0836966      1.49    0.137      .9651582     1.294422
     ip61c84 |    1.145195    .1217283      1.28    0.202       .929825      1.41045
     ip61c85 |    1.144478    .0946226      1.63    0.103      .9732671     1.345806
     ip61c86 |     1.21492    .1020512      2.32    0.020      1.030501     1.432344
     ip61c87 |    .9912378    .0827325     -0.11    0.916      .8416535     1.167407
     ip61c88 |    1.195128    .1013425      2.10    0.036      1.012129     1.411216
     ip61c89 |    1.178816    .0852839      2.27    0.023      1.022973     1.358401
     ip61c90 |    1.076651    .0863205      0.92    0.357      .9200889     1.259853
     ip61c91 |    1.237794    .1048372      2.52    0.012      1.048466     1.461311
     ip61c92 |    1.115629    .0732315      1.67    0.096      .9809472     1.268802
     ip61c93 |    1.266247    .0998827      2.99    0.003      1.084863     1.477958
     ip61c94 |    1.088454    .1083282      0.85    0.394      .8955589     1.322896
     ip61c95 |    1.219467    .0832891      2.91    0.004      1.066678     1.394141
     ip61c96 |      1.0557    .0880751      0.65    0.516       .896451      1.24324
     ip61c97 |    1.125161    .1093538      1.21    0.225      .9300081     1.361264
     ip61c98 |     1.13679    .0735261      1.98    0.047      1.001442     1.290432
     ip61c99 |    1.020132    .0750321      0.27    0.786        .88318      1.17832
     ip62c81 |    1.217324    .1087472      2.20    0.028      1.021799     1.450262
     ip62c82 |    1.533141    .2190607      2.99    0.003      1.158669      2.02864
     ip62c83 |    1.202521    .1969385      1.13    0.260      .8723491     1.657659
     ip62c84 |    1.606068    .2283819      3.33    0.001      1.215412     2.122288
     ip62c85 |    1.354796     .175907      2.34    0.019      1.050398     1.747407
     ip62c86 |    1.302889    .1582343      2.18    0.029      1.026904     1.653045
     ip62c87 |    1.430862     .207162      2.47    0.013      1.077357     1.900359
     ip62c88 |    1.279435     .153655      2.05    0.040      1.011096     1.618989
     ip62c89 |    1.324719    .1232201      3.02    0.003      1.103947     1.589641
     ip62c90 |    1.208665    .1424049      1.61    0.108      .9594393     1.522631
     ip62c91 |    1.467034     .154147      3.65    0.000      1.193991     1.802516
     ip62c92 |    1.116932     .107418      1.15    0.250      .9250483     1.348617
     ip62c93 |    1.550292    .2834443      2.40    0.016      1.083392     2.218406
     ip62c94 |    1.135742     .126965      1.14    0.255      .9122703     1.413956
     ip62c95 |    1.238881    .1684384      1.58    0.115      .9490738     1.617182
     ip62c96 |    1.225883    .1552414      1.61    0.108      .9564363     1.571239
     ip62c97 |    1.128395    .1237244      1.10    0.271      .9101861     1.398918
     ip62c98 |    1.251034    .1521528      1.84    0.066      .9856994     1.587792
     ip62c99 |    1.175063    .1057136      1.79    0.073      .9851076     1.401648
     ip63c81 |    1.175127    .1596329      1.19    0.235      .9004407     1.533609
     ip63c82 |    1.158155    .1214721      1.40    0.162      .9429505     1.422473
     ip63c83 |    1.295353    .1491736      2.25    0.025      1.033625     1.623353
     ip63c84 |    1.194876    .1634921      1.30    0.193      .9138083     1.562395
     ip63c85 |    1.377275    .1499213      2.94    0.003      1.112664     1.704814
     ip63c86 |    1.028883    .1101131      0.27    0.790      .8341976     1.269005
     ip63c87 |    1.180677    .1484774      1.32    0.187      .9227569     1.510689
     ip63c88 |    1.073047    .1068901      0.71    0.479      .8827289     1.304397
     ip63c89 |    1.021572    .1184712      0.18    0.854      .8138714     1.282279
     ip63c90 |    1.136548    .1428066      1.02    0.308      .8884535     1.453921
     ip63c91 |    1.222331    .1595055      1.54    0.124      .9464833     1.578573
     ip63c92 |    1.265517    .1641854      1.82    0.070      .9813746     1.631928
     ip63c93 |    .9314783    .0812194     -0.81    0.416      .7851507     1.105077
     ip63c94 |    1.156501    .1450864      1.16    0.246      .9043992     1.478876
     ip63c95 |    .9818049    .1319366     -0.14    0.891      .7544654     1.277648
     ip63c96 |     1.25095    .1499583      1.87    0.062      .9890128     1.582262
     ip63c97 |    1.062792    .1214636      0.53    0.594      .8495069     1.329627
     ip63c98 |    1.116452    .0784858      1.57    0.117      .9727495     1.281382
     ip63c99 |    1.167039    .0939236      1.92    0.055      .9967363     1.366439
     ip64c81 |    1.197599     .182525      1.18    0.237       .888343     1.614516
     ip64c82 |    1.261202    .1443076      2.03    0.043      1.007836     1.578264
     ip64c83 |    1.508681    .1880222      3.30    0.001      1.181721     1.926106
     ip64c84 |    1.284072     .147329      2.18    0.029      1.025477     1.607876
     ip64c85 |    1.391091     .205323      2.24    0.025      1.041644     1.857769
     ip64c86 |    1.232681    .1377977      1.87    0.061      .9901415     1.534631
     ip64c87 |    1.281179    .1849284      1.72    0.086      .9654848     1.700099
     ip64c88 |    1.148082    .1162682      1.36    0.173      .9413918     1.400153
     ip64c89 |    1.062718    .1142588      0.57    0.572      .8607966     1.312005
     ip64c90 |     1.38264    .1851557      2.42    0.016       1.06346     1.797619
     ip64c91 |     1.27764    .1278214      2.45    0.014      1.050147     1.554414
     ip64c92 |     1.08128    .1107954      0.76    0.446      .8845412     1.321777
     ip64c93 |    .9896249    .0825934     -0.12    0.901      .8402914     1.165497
     ip64c94 |    1.200497    .1045741      2.10    0.036      1.012078     1.423995
     ip64c95 |    1.163648    .1519656      1.16    0.246      .9008654     1.503086
     ip64c96 |    1.184853    .1232092      1.63    0.103      .9663861     1.452708
     ip64c97 |    1.116186    .0814303      1.51    0.132      .9674706      1.28776
     ip64c98 |    1.066029    .1143979      0.60    0.551       .863823     1.315568
     ip64c99 |     1.16304    .1133189      1.55    0.121      .9608583     1.407765
     ip65c81 |    1.163636    .1231128      1.43    0.152      .9457138     1.431773
     ip65c82 |    1.126419    .1278363      1.05    0.294      .9017742     1.407026
     ip65c83 |    1.115993    .1395514      0.88    0.380      .8734163     1.425941
     ip65c84 |    1.101707    .1242017      0.86    0.390       .883294     1.374127
     ip65c85 |    1.155521    .1438576      1.16    0.246      .9053294     1.474853
     ip65c86 |    1.108717    .1330785      0.86    0.390      .8762973      1.40278
     ip65c87 |    1.136411    .1001941      1.45    0.147      .9560646     1.350776
     ip65c88 |    .9969588    .1258988     -0.02    0.981      .7783682     1.276937
     ip65c89 |    1.190465    .1944328      1.07    0.286      .8643587     1.639605
     ip65c90 |    1.207076     .103582      2.19    0.028      1.020213     1.428164
     ip65c91 |     .994897    .1116171     -0.05    0.964      .7985133     1.239579
     ip65c92 |    1.150062    .1505266      1.07    0.285      .8898385     1.486385
     ip65c93 |    1.096356    .1044321      0.97    0.334      .9096442     1.321393
     ip65c94 |    1.022379    .1108003      0.20    0.838       .826729     1.264332
     ip65c95 |    1.112192    .1146123      1.03    0.302      .9087881     1.361121
     ip65c96 |    1.041771    .1170362      0.36    0.716      .8358827     1.298372
     ip65c97 |    1.039089     .118996      0.33    0.738      .8301827     1.300565
     ip65c98 |    1.028025    .0931178      0.31    0.760      .8608003     1.227736
     ip65c99 |    1.085238    .0822157      1.08    0.280      .9354907     1.258956
     ip56c00 |    1.545599    .1614268      4.17    0.000       1.25949       1.8967
     ip56c01 |    1.242059    .0813591      3.31    0.001       1.09241     1.412209
     ip56c02 |    1.380715    .0850847      5.24    0.000       1.22363     1.557967
     ip56c03 |     1.22561    .1160589      2.15    0.032      1.018001     1.475559
     ip56c04 |    1.241232    .1754844      1.53    0.126      .9408291     1.637552
     ip57c00 |    1.318632    .2109593      1.73    0.084      .9637083     1.804271
     ip57c01 |    1.107442    .0709721      1.59    0.111      .9767208     1.255658
     ip57c02 |    1.215371    .1367796      1.73    0.083      .9747952      1.51532
     ip57c03 |    1.339686    .1280858      3.06    0.002      1.110761     1.615791
     ip57c04 |     1.09748    .1315867      0.78    0.438      .8676378     1.388209
     ip58c00 |    1.024891     .119695      0.21    0.833      .8152066      1.28851
     ip58c01 |    1.216754    .0738238      3.23    0.001      1.080334       1.3704
     ip58c02 |    .8705826    .1017702     -1.19    0.236      .6923177     1.094749
     ip58c03 |    1.103791    .0925452      1.18    0.239      .9365255     1.300931
     ip58c04 |    1.092545    .0994277      0.97    0.331      .9140609      1.30588
     ip59c00 |     .876876    .0583918     -1.97    0.048       .769584     .9991261
     ip59c01 |    1.121391    .1159073      1.11    0.268       .915749     1.373211
     ip59c02 |    .9942931    .1191633     -0.05    0.962      .7861407      1.25756
     ip59c03 |    1.063788    .1260338      0.52    0.602      .8433502     1.341846
     ip59c04 |    1.021981    .0533562      0.42    0.677      .9225772     1.132095
     ip60c00 |    1.020614     .076455      0.27    0.785      .8812465     1.182023
     ip60c01 |    1.160356    .0809559      2.13    0.033      1.012056     1.330387
     ip60c02 |    1.162784    .0782644      2.24    0.025      1.019076     1.326757
     ip60c03 |    1.103493    .0698602      1.56    0.120      .9747235     1.249274
     ip60c04 |    1.102942    .1057038      1.02    0.307      .9140606     1.330853
     ip61c00 |    1.199092    .1120861      1.94    0.052      .9983564     1.440188
     ip61c01 |    1.101625    .0820986      1.30    0.194      .9519149     1.274881
     ip61c02 |    1.129317     .091707      1.50    0.134      .9631489     1.324153
     ip61c03 |    1.216761    .0678613      3.52    0.000      1.090767     1.357308
     ip61c04 |     1.14095    .1280029      1.18    0.240      .9157365     1.421552
     ip62c00 |    1.207098    .1580468      1.44    0.151      .9338858      1.56024
     ip62c01 |    1.407107    .1653939      2.91    0.004      1.117571     1.771654
     ip62c02 |    1.126917    .0639366      2.11    0.035      1.008319     1.259463
     ip62c03 |    1.165163    .1049552      1.70    0.090      .9765903     1.390148
     ip62c04 |    1.324852    .1527276      2.44    0.015      1.056919     1.660707
     ip63c00 |    1.106961     .081049      1.39    0.165      .9589798     1.277778
     ip63c01 |    1.263887    .0816353      3.63    0.000      1.113598     1.434458
     ip63c02 |    1.160006    .0974333      1.77    0.077      .9839307      1.36759
     ip63c03 |    1.253972     .115964      2.45    0.014      1.046094     1.503158
     ip63c04 |    1.173789    .0572294      3.29    0.001      1.066814      1.29149
     ip64c00 |    1.127927    .1045819      1.30    0.194      .9404965      1.35271
     ip64c01 |    1.125051    .0813126      1.63    0.103      .9764543     1.296261
     ip64c02 |    1.145495    .0695369      2.24    0.025         1.017     1.290224
     ip64c03 |    1.126209    .0649488      2.06    0.039      1.005843      1.26098
     ip64c04 |    1.147431    .0746523      2.11    0.035      1.010059     1.303485
     ip65c00 |    1.005493    .0809751      0.07    0.946      .8586767     1.177413
     ip65c01 |    1.045204    .1099963      0.42    0.674      .8503967     1.284638
     ip65c02 |    .9993358    .0676517     -0.01    0.992       .875161      1.14113
     ip65c03 |    1.046148    .0814206      0.58    0.562       .898142     1.218544
     ip65c04 |    1.000222    .0767927      0.00    0.998      .8604879     1.162647
 ia1journal2 |    .9790645    .0102179     -2.03    0.043      .9592413     .9992973
 ia1journal3 |    .9162607    .0087188     -9.19    0.000      .8993305     .9335097
 ia1journal4 |    .9556533    .0074629     -5.81    0.000      .9411376     .9703929
 ia1journal5 |    .9739747    .0127482     -2.01    0.044      .9493064     .9992841
 ia1journal6 |    .8419201     .003613    -40.10    0.000      .8348685     .8490313
 ia1journal7 |    .9745082    .0020043    -12.56    0.000      .9705878     .9784445
 ia1journal8 |    1.005253    .0078679      0.67    0.503      .9899497     1.020793
 ia1journal9 |    .9410496    .0079339     -7.21    0.000      .9256272     .9567289
ia1journal10 |    .8732403    .0208616     -5.67    0.000      .8332948     .9151007
ia1journal11 |    1.047257     .005365      9.01    0.000      1.036794     1.057825
ia1journal12 |    .9988657    .0035871     -0.32    0.752      .9918597     1.005921
ia1journal13 |    .9752505    .0072046     -3.39    0.001      .9612314      .989474
ia1journal14 |     1.06223    .0055059     11.65    0.000      1.051494     1.073077
ia1journal15 |    1.039728    .0064546      6.28    0.000      1.027154     1.052456
ia1journal16 |    1.039066    .0120493      3.30    0.001      1.015716     1.062952
ia1journal17 |    .9167455    .0052871    -15.07    0.000      .9064413     .9271667
ia1journal18 |    .9097492    .0069007    -12.47    0.000      .8963241     .9233755
ia1journal19 |    .8175262    .0114055    -14.44    0.000      .7954746      .840189
ia1journal20 |    .9852815    .0037197     -3.93    0.000      .9780179      .992599
ia1journal21 |    1.101205    .0060865     17.44    0.000       1.08934       1.1132
ia1journal22 |    1.029258    .0109417      2.71    0.007      1.008035     1.050929
ia1journal23 |    .7746813    .0067581    -29.27    0.000      .7615483     .7880408
ia1journal24 |    .8131331    .0139681    -12.04    0.000      .7862118     .8409762
ia1journal26 |    1.109088    .0152761      7.52    0.000      1.079548     1.139437
ia1journal27 |    .8931716    .0066911    -15.08    0.000       .880153     .9063827
ia1journal28 |    1.019314    .0108398      1.80    0.072      .9982881     1.040782
ia1journal29 |    .9766232    .0090459     -2.55    0.011      .9590535     .9945148
ia1journal30 |     1.02712    .0240287      1.14    0.253      .9810877     1.075312
ia1journal31 |     .945685    .0068491     -7.71    0.000      .9323558     .9592047
ia1journal32 |    .8734986    .0111377    -10.61    0.000      .8519397     .8956031
ia1journal33 |    1.091945    .0111469      8.62    0.000      1.070315     1.114013
ia1journal34 |    .9240893    .0050077    -14.57    0.000      .9143264     .9339564
ia1journal35 |    3.803763    .0860268     59.07    0.000      3.638836     3.976165
ia1journal36 |     .831762    .0144071    -10.63    0.000      .8039985     .8604842
ia1journal37 |    1.095338    .0063327     15.75    0.000      1.082996      1.10782
ia1journal38 |    .9548983     .004602     -9.58    0.000      .9459209     .9639608
ia1journal39 |    1.070052    .0065621     11.04    0.000      1.057268     1.082992
 ia2journal2 |    1.000279    .0001224      2.28    0.023      1.000039     1.000519
 ia2journal3 |    1.001352    .0001608      8.41    0.000      1.001037     1.001667
 ia2journal4 |    1.000625    .0001256      4.97    0.000      1.000379     1.000871
 ia2journal5 |    1.000394    .0001957      2.02    0.044      1.000011     1.000778
 ia2journal6 |    1.002064    .0000599     34.50    0.000      1.001947     1.002182
 ia2journal7 |    1.000319    .0000393      8.10    0.000      1.000242     1.000396
 ia2journal8 |    .9998533    .0001091     -1.34    0.179      .9996394     1.000067
 ia2journal9 |     1.00105    .0001309      8.03    0.000      1.000794     1.001307
ia2journal10 |    1.002465    .0003819      6.46    0.000      1.001717     1.003214
ia2journal11 |    .9995248    .0000826     -5.75    0.000      .9993629     .9996867
ia2journal12 |    .9993739    .0000483    -12.96    0.000      .9992793     .9994686
ia2journal13 |    1.000225    .0001062      2.12    0.034      1.000017     1.000433
ia2journal14 |    .9990611    .0000897    -10.46    0.000      .9988853     .9992369
ia2journal15 |    .9987201    .0001031    -12.40    0.000       .998518     .9989223
ia2journal16 |    .9993537    .0001875     -3.44    0.001      .9989862     .9997214
ia2journal17 |    1.000956    .0000721     13.27    0.000      1.000815     1.001098
ia2journal18 |    1.001026    .0001141      8.99    0.000      1.000802     1.001249
ia2journal19 |    1.003911     .000245     16.00    0.000      1.003431     1.004391
ia2journal20 |    1.000282    .0000585      4.83    0.000      1.000168     1.000397
ia2journal21 |    .9980284    .0000963    -20.45    0.000      .9978397     .9982172
ia2journal22 |    .9994085    .0001764     -3.35    0.001      .9990629     .9997542
ia2journal23 |    1.004165    .0001345     31.04    0.000      1.003902     1.004429
ia2journal24 |    1.001882    .0002495      7.55    0.000      1.001393     1.002371
ia2journal26 |    .9974341    .0002607     -9.83    0.000      .9969232     .9979453
ia2journal27 |    1.001776    .0001255     14.16    0.000       1.00153     1.002022
ia2journal28 |    .9991975    .0001756     -4.57    0.000      .9988535     .9995417
ia2journal29 |    .9997655    .0001703     -1.38    0.168      .9994319     1.000099
ia2journal30 |    .9996745    .0003333     -0.98    0.329      .9990215     1.000328
ia2journal31 |      1.0007     .000099      7.08    0.000      1.000506     1.000894
ia2journal32 |    1.002148     .000223      9.64    0.000      1.001711     1.002585
ia2journal33 |    .9976456    .0001788    -13.15    0.000      .9972953     .9979961
ia2journal34 |    1.000622     .000102      6.10    0.000      1.000422     1.000821
ia2journal35 |    .9663267      .00047    -70.42    0.000      .9654059     .9672484
ia2journal36 |    1.001941     .000295      6.58    0.000      1.001362     1.002519
ia2journal37 |    .9979419    .0001191    -17.26    0.000      .9977084     .9981755
ia2journal38 |    1.000226    .0000862      2.62    0.009      1.000057     1.000395
ia2journal39 |    .9988844    .0000996    -11.19    0.000      .9986892     .9990797
       d1c95 |    1.083099    .0474739      1.82    0.069      .9939365      1.18026
       d1c00 |    .9577699    .0504392     -0.82    0.413      .8638419     1.061911
       d2c95 |    1.010052    .0264324      0.38    0.702      .9595518      1.06321
       d2c00 |    1.055647    .0414236      1.38    0.168      .9775016     1.140039
-------------+----------------------------------------------------------------
Wald chi2(319) =  1.2e+16                                Prob > chi2 =   0.0000

. **********************************************************************;
. *** 1966-1975                                                      ***;
. **********************************************************************;
. clear;

. use temp_data;

. gen plower = 1966;

. gen pupper = 1975;

. keep if pyear >= plower & pyear <= pupper;
(47,947 observations deleted)

. * Create fixed effects for publication x citation year interactions;
. * Drop the 2005 cyear to avoid multicolinearity with the constant;
. * Don't create variables with pyear after cyear;
. * Do create variables with pyear = cyear since keeping age0 = 1 observations;
. forvalues y = 56/99 {;
  2.    forvalues x = 80/99 {;
  3.       quietly gen ip`y'c`x' = py19`y' * c`x' if
>          (`x' >= `y')
>        & (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 56/99 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip`y'c0`x' = py19`y' * c0`x' if
>          (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 0/5 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip0`y'c0`x' = py200`y' * c0`x' if
>          (`x' >= `y')
>        & (2000 + `y' >= plower)
>        & (2000 + `y' <= pupper);
  4.    };
  5. };

. foreach var of varlist ip* {;
  2.    capture assert !missing(`var');
  3.    if _rc {;
  4.       drop `var';
  5.    };
  6. };

. egen title = group(journal);

. rename journal smournal;

. quietly tabulate title, generate(journal);

. drop title;

. foreach var of varlist journal* {;
  2.    quietly gen ia1`var' = age * `var';
  3.    quietly gen ia2`var' = age2 * `var';
  4.    quietly gen ia3`var' = age3 * `var';
  5.    quietly gen ia4`var' = age4 * `var';
  6. };

. rename smournal journal;

. * Avoid multicolinearity by dropping first journal's age profile;
.  drop ia1journal1 ia2journal1 ia3journal1 ia4journal1;

.  * Column 1: No fixed effects or journal age profile;
. poisson cit  ip* d1c* d2c*, irr cluster(journal);

Iteration 0:   log pseudolikelihood = -193485.68
Iteration 1:   log pseudolikelihood = -193369.99
Iteration 2:   log pseudolikelihood = -193369.66
Iteration 3:   log pseudolikelihood = -193369.66

Poisson regression                              Number of obs     =     12,506
                                                Wald chi2(57)     =          .
Log pseudolikelihood = -193369.66               Prob > chi2       =          .

(Std. Err. adjusted for 59 clusters in journal)
-------------+----------------------------------------------------------------
             |               Robust
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip66c80 |    4.045133    1.738795      3.25    0.001      1.741988     9.393351
     ip66c81 |    3.714597    1.539546      3.17    0.002      1.648633     8.369498
     ip66c82 |    3.730337    1.575811      3.12    0.002      1.629949     8.537332
     ip66c83 |    3.517849    1.469572      3.01    0.003       1.55128     7.977453
     ip66c84 |    3.321102    1.316416      3.03    0.002      1.527156      7.22239
     ip66c85 |     3.43915    1.401853      3.03    0.002      1.546991     7.645654
     ip66c86 |    3.124354     1.33869      2.66    0.008      1.349107      7.23559
     ip66c87 |     3.43915    1.397054      3.04    0.002      1.551227     7.624772
     ip66c88 |    2.943346    1.255069      2.53    0.011       1.27609     6.788929
     ip66c89 |     2.62855    1.082541      2.35    0.019      1.172621     5.892162
     ip66c90 |    2.888257     1.23511      2.48    0.013      1.249209     6.677848
     ip66c91 |    2.518371    1.039014      2.24    0.025      1.121854     5.653315
     ip66c92 |    2.423932    1.027746      2.09    0.037      1.055872     5.564543
     ip66c93 |    2.455412    1.002978      2.20    0.028      1.102627     5.467893
     ip66c94 |    2.360973    1.036876      1.96    0.050      .9983118     5.583619
     ip66c95 |    2.132745    .9023707      1.79    0.073      .9306647     4.887478
     ip66c96 |    1.832151    .5495966      2.02    0.044      1.017709     3.298368
     ip66c97 |    1.389323    .3392907      1.35    0.178      .8608525     2.242217
     ip66c98 |    1.202369    .3051988      0.73    0.468      .7310994     1.977422
     ip66c99 |    1.059052    .2846943      0.21    0.831       .625313     1.793648
     ip67c80 |    3.685872    1.322623      3.64    0.000       1.82431     7.447011
     ip67c81 |    3.588679    1.294111      3.54    0.000      1.770041     7.275883
     ip67c82 |    3.364386    1.148988      3.55    0.000      1.722693     6.570581
     ip67c83 |    3.259716    1.171581      3.29    0.001      1.611565     6.593435
     ip67c84 |    3.386815    1.162971      3.55    0.000      1.727843     6.638636
     ip67c85 |     3.25224    1.186592      3.23    0.001      1.590811     6.648852
     ip67c86 |    2.698985    .9137823      2.93    0.003      1.389996      5.24068
     ip67c87 |    2.661603    .8782657      2.97    0.003      1.394014     5.081823
     ip67c88 |    2.467217    .8638994      2.58    0.010      1.242104     4.900684
     ip67c89 |    2.265353     .790233      2.34    0.019      1.143425     4.488118
     ip67c90 |    2.213019    .7675122      2.29    0.022      1.121435      4.36713
     ip67c91 |    2.041061    .7038407      2.07    0.039       1.03831     4.012221
     ip67c92 |    1.869103     .668973      1.75    0.081      .9267846     3.769536
     ip67c93 |    2.100872    .7004783      2.23    0.026      1.092924     4.038401
     ip67c94 |    1.809292    .6501874      1.65    0.099      .8945834     3.659288
     ip67c95 |    1.727052    .6136465      1.54    0.124      .8607183      3.46537
     ip67c96 |    1.536807    .4286891      1.54    0.123      .8895666     2.654974
     ip67c97 |    1.254879    .3417815      0.83    0.405      .7358117     2.140114
     ip67c98 |    1.038051    .2929057      0.13    0.895      .5970852     1.804685
     ip67c99 |     .891604    .2570468     -0.40    0.691       .506726     1.568812
     ip68c80 |     4.95182    1.845544      4.29    0.000      2.385184     10.28035
     ip68c81 |    4.444119    1.566457      4.23    0.000       2.22718     8.867805
     ip68c82 |     4.08247    1.436645      4.00    0.000      2.048237     8.137026
     ip68c83 |    4.492803    1.585935      4.26    0.000      2.249303     8.974017
     ip68c84 |    3.957283    1.379785      3.95    0.000      1.998062      7.83764
     ip68c85 |    4.200701     1.50676      4.00    0.000      2.079707     8.484797
     ip68c86 |     3.72082    1.358933      3.60    0.000      1.818693     7.612336
     ip68c87 |    3.922509    1.383783      3.87    0.000      1.964613     7.831606
     ip68c88 |    3.602588    1.318878      3.50    0.000       1.75791     7.382994
     ip68c89 |     3.17139     1.18251      3.10    0.002      1.527087      6.58621
     ip68c90 |    3.268758    1.228082      3.15    0.002       1.56525     6.826242
     ip68c91 |     3.02534    1.129839      2.96    0.003      1.455076     6.290175
     ip68c92 |    2.941882    1.020477      3.11    0.002      1.490601     5.806161
     ip68c93 |    3.449583     1.29071      3.31    0.001      1.656828      7.18217
     ip68c94 |    3.094888    1.164721      3.00    0.003      1.480151     6.471182
     ip68c95 |    2.893198    1.095423      2.81    0.005      1.377515     6.076592
     ip68c96 |     2.74578    .7783563      3.56    0.000      1.575333     4.785848
     ip68c97 |    2.073692    .5140433      2.94    0.003       1.27568     3.370908
     ip68c98 |    1.759161    .4228246      2.35    0.019      1.098283     2.817714
     ip68c99 |    1.438111    .3885155      1.34    0.179      .8469042     2.442026
     ip69c80 |     6.04476    1.955963      5.56    0.000      3.205881     11.39753
     ip69c81 |    5.033058     1.79328      4.54    0.000      2.503506     10.11848
     ip69c82 |    5.351203    1.835373      4.89    0.000      2.732144     10.48092
     ip69c83 |    5.427558    1.920985      4.78    0.000      2.712297     10.86105
     ip69c84 |    5.001244    1.645419      4.89    0.000      2.624406     9.530705
     ip69c85 |    4.956703    1.658852      4.78    0.000      2.572306     9.551317
     ip69c86 |    4.447671    1.639048      4.05    0.000      2.159978     9.158321
     ip69c87 |      4.5113    1.561825      4.35    0.000      2.288828      8.89181
     ip69c88 |    3.741388    1.292077      3.82    0.000      1.901397     7.361947
     ip69c89 |    3.817743    1.336117      3.83    0.000       1.92268     7.580651
     ip69c90 |     3.81138    1.348386      3.78    0.000       1.90522     7.624643
     ip69c91 |    3.550501    1.180161      3.81    0.000      1.850787     6.811189
     ip69c92 |    3.588679     1.23331      3.72    0.000      1.829805     7.038243
     ip69c93 |    3.359614    1.198193      3.40    0.001      1.669981     6.758762
     ip69c94 |    3.105098    1.058192      3.32    0.001      1.592183     6.055608
     ip69c95 |    3.079646    1.034573      3.35    0.001      1.594223     5.949118
     ip69c96 |    2.472457    .6623506      3.38    0.001       1.46251     4.179829
     ip69c97 |    1.854859     .528773      2.17    0.030      1.060852     3.243148
     ip69c98 |    1.662689     .436046      1.94    0.053      .9944443      2.77998
     ip69c99 |    1.472678    .4178257      1.36    0.172      .8445128     2.568084
     ip70c80 |     6.75516    2.143222      6.02    0.000      3.627216      12.5805
     ip70c81 |    6.262596    1.900638      6.04    0.000        3.4548     11.35235
     ip70c82 |    5.799352    1.851744      5.50    0.000      3.101624     10.84351
     ip70c83 |    6.069089    1.806697      6.06    0.000      3.386341     10.87718
     ip70c84 |    5.699666    1.678607      5.91    0.000       3.20009     10.15165
     ip70c85 |    6.057361    1.822718      5.99    0.000      3.358526     10.92492
     ip70c86 |    5.412337    1.639217      5.58    0.000      2.989401     9.799086
     ip70c87 |    5.687938    1.721958      5.74    0.000      3.142413     10.29548
     ip70c88 |    5.136736    1.578983      5.32    0.000      2.812135     9.382929
     ip70c89 |     4.88459    1.522109      5.09    0.000      2.652048     8.996528
     ip70c90 |    4.949093    1.461161      5.42    0.000      2.774715       8.8274
     ip70c91 |    4.626581    1.324571      5.35    0.000      2.639762     8.108781
     ip70c92 |    4.538623    1.379537      4.98    0.000      2.501481     8.234762
     ip70c93 |    4.239566    1.352483      4.53    0.000      2.268693     7.922589
     ip70c94 |    4.157472    1.284516      4.61    0.000      2.269015     7.617655
     ip70c95 |    4.139881     1.19236      4.93    0.000      2.354109     7.280297
     ip70c96 |    3.500983    .7866353      5.58    0.000      2.253895      5.43809
     ip70c97 |    2.677264    .5411614      4.87    0.000      1.801507     3.978749
     ip70c98 |    2.323683     .505656      3.87    0.000      1.516866     3.559644
     ip70c99 |    1.967648    .4841572      2.75    0.006      1.214792     3.187081
     ip71c80 |     7.94992    2.603172      6.33    0.000      4.184465     15.10378
     ip71c81 |    7.164897    2.358387      5.98    0.000       3.75863      13.6581
     ip71c82 |     7.23343    2.299546      6.22    0.000      3.879206     13.48795
     ip71c83 |    7.507566     2.46883      6.13    0.000      3.940808     14.30253
     ip71c84 |    6.741233    2.071729      6.21    0.000       3.69102     12.31211
     ip71c85 |    6.654008    2.087528      6.04    0.000      3.597827     12.30627
     ip71c86 |    6.822228    2.226871      5.88    0.000      3.598173     12.93512
     ip71c87 |    6.211654    2.013659      5.63    0.000      3.290558     11.72587
     ip71c88 |    6.049665    1.896661      5.74    0.000      3.272404     11.18396
     ip71c89 |    5.569928    1.724942      5.55    0.000      3.035585     10.22014
     ip71c90 |    5.725687     1.83882      5.43    0.000      3.051138     10.74468
     ip71c91 |    5.688305     1.80973      5.46    0.000      3.049115     10.61187
     ip71c92 |    4.965585    1.613069      4.93    0.000      2.626986     9.386054
     ip71c93 |    5.040349    1.576805      5.17    0.000      2.730069     9.305668
     ip71c94 |    4.610455    1.461553      4.82    0.000      2.476885     8.581867
     ip71c95 |    4.716371    1.530595      4.78    0.000      2.496716     8.909366
     ip71c96 |    3.791716    .8873814      5.70    0.000      2.396778     5.998517
     ip71c97 |      3.1187    .7357719      4.82    0.000      1.964065     4.952122
     ip71c98 |    2.586058    .6236967      3.94    0.000      1.611938     4.148854
     ip71c99 |     2.05069     .485742      3.03    0.002      1.289074     3.262286
     ip72c80 |    9.380611    3.050958      6.88    0.000      4.958903     17.74503
     ip72c81 |    8.465131    2.654752      6.81    0.000      4.578131     15.65234
     ip72c82 |    8.465131    2.631332      6.87    0.000      4.603023     15.56769
     ip72c83 |    9.252444    2.972297      6.93    0.000       4.92961     17.36602
     ip72c84 |    8.465131    2.614772      6.91    0.000      4.620706     15.50812
     ip72c85 |    8.050114    2.460964      6.82    0.000      4.421657     14.65612
     ip72c86 |    7.500827    2.314254      6.53    0.000      4.097182     13.73197
     ip72c87 |    7.232286    2.324815      6.16    0.000      3.851743     13.57982
     ip72c88 |    6.841682    2.173206      6.05    0.000      3.671009     12.75088
     ip72c89 |    6.383942    1.987224      5.96    0.000      3.468349     11.75046
     ip72c90 |    5.950615     1.87737      5.65    0.000      3.206379     11.04356
     ip72c91 |    5.798035    1.777865      5.73    0.000      3.178886     10.57515
     ip72c92 |    5.798035    1.829284      5.57    0.000      3.124109     10.76058
     ip72c93 |    5.816345    1.853276      5.53    0.000      3.114797     10.86102
     ip72c94 |     5.27316    1.542642      5.68    0.000      2.972045     9.355921
     ip72c95 |    5.541701    1.669441      5.68    0.000      3.070563     10.00157
     ip72c96 |    4.605091    1.083694      6.49    0.000      2.903548     7.303775
     ip72c97 |    3.145233      .66948      5.38    0.000      2.072382     4.773486
     ip72c98 |    3.018584    .6872149      4.85    0.000      1.932047     4.716165
     ip72c99 |    2.362337    .5855238      3.47    0.001      1.453332      3.83989
     ip73c80 |    9.783422    3.528981      6.32    0.000      4.824514     19.83937
     ip73c81 |    9.026625    3.164546      6.28    0.000      4.540586     17.94481
     ip73c82 |    9.368404    3.425622      6.12    0.000      4.575282     19.18286
     ip73c83 |    9.319579    3.332764      6.24    0.000        4.6238     18.78423
     ip73c84 |    9.044935    3.235773      6.16    0.000      4.486349     18.23551
     ip73c85 |    8.562783    2.996707      6.14    0.000      4.312419     17.00235
     ip73c86 |    8.001289    2.799235      5.94    0.000      4.030592     15.88368
     ip73c87 |    8.172178    2.868403      5.99    0.000      4.107422     16.25947
     ip73c88 |    7.537446    2.673289      5.70    0.000      3.761235      15.1049
     ip73c89 |    7.311628    2.546871      5.71    0.000      3.694143     14.47153
     ip73c90 |     7.04919    2.482935      5.54    0.000       3.53444     14.05911
     ip73c91 |    6.682999    2.319327      5.47    0.000      3.385032     13.19411
     ip73c92 |      6.3046    2.303125      5.04    0.000      3.081104     12.90057
     ip73c93 |     6.18864      2.1889      5.15    0.000      3.094057     12.37833
     ip73c94 |    6.097092    2.288035      4.82    0.000      2.922101     12.72185
     ip73c95 |    5.669868    1.921694      5.12    0.000      2.917927     11.01721
     ip73c96 |    5.102007    1.442946      5.76    0.000      2.930926     8.881317
     ip73c97 |    3.888138    .9110182      5.80    0.000        2.4564     6.154378
     ip73c98 |    3.726238    .8610681      5.69    0.000      2.369042     5.860954
     ip73c99 |    3.002568    .7569755      4.36    0.000       1.83188     4.921401
     ip74c80 |    10.39353    3.134295      7.76    0.000      5.755363     18.76952
     ip74c81 |    9.606536    3.006926      7.23    0.000       5.20156      17.7419
     ip74c82 |     10.0525    3.128903      7.41    0.000      5.461754     18.50188
     ip74c83 |    9.779674    3.025979      7.37    0.000      5.332732      17.9349
     ip74c84 |    9.601289    2.864695      7.58    0.000      5.350079     17.23054
     ip74c85 |     9.52259    2.991572      7.17    0.000      5.144529     17.62644
     ip74c86 |    8.940217    2.846654      6.88    0.000      4.789796     16.68703
     ip74c87 |      8.1165    2.565237      6.63    0.000      4.368625      15.0797
     ip74c88 |    7.712511     2.48647      6.34    0.000        4.0999     14.50836
     ip74c89 |    7.450181    2.310886      6.47    0.000      4.056415     13.68331
     ip74c90 |    7.256056    2.242406      6.41    0.000      3.959551     13.29705
     ip74c91 |    6.951753    2.138767      6.30    0.000      3.803775     12.70498
     ip74c92 |    6.668437    2.184396      5.79    0.000      3.509084     12.67226
     ip74c93 |    6.537271    2.182596      5.62    0.000      3.397866     12.57728
     ip74c94 |    5.834226    1.803158      5.71    0.000       3.18351     10.69203
     ip74c95 |    6.007364    1.951338      5.52    0.000      3.178286     11.35468
     ip74c96 |    4.952085    1.154416      6.86    0.000      3.135872       7.8202
     ip74c97 |    4.117667    .9126518      6.39    0.000      2.666788     6.357905
     ip74c98 |    3.549501    .7767542      5.79    0.000      2.311505     5.450543
     ip74c99 |    2.779238    .6267026      4.53    0.000      1.786424     4.323813
     ip75c80 |    10.03614     3.10113      7.46    0.000       5.47707     18.39013
     ip75c81 |    10.17299    3.178122      7.43    0.000       5.51476     18.76596
     ip75c82 |    9.909416    3.177792      7.15    0.000      5.285442     18.57868
     ip75c83 |    9.605291     3.09023      7.03    0.000       5.11282     18.04515
     ip75c84 |    9.402541    2.972367      7.09    0.000      5.060112      17.4715
     ip75c85 |    9.585016    2.988969      7.25    0.000       5.20183     17.66158
     ip75c86 |    8.642228    2.716838      6.86    0.000      4.666974     16.00354
     ip75c87 |    7.978221    2.490198      6.65    0.000      4.327382     14.70913
     ip75c88 |    7.415589    2.336632      6.36    0.000      3.998843     13.75172
     ip75c89 |    6.482938     1.93252      6.27    0.000      3.614385     11.62812
     ip75c90 |    6.888438     2.11022      6.30    0.000      3.778868     12.55682
     ip75c91 |    6.396769     1.90243      6.24    0.000      3.571159     11.45809
     ip75c92 |    5.834137    1.702568      6.04    0.000      3.292848     10.33669
     ip75c93 |    5.910169    1.730547      6.07    0.000      3.329361     10.49153
     ip75c94 |    5.464118     1.56469      5.93    0.000      3.117255     9.577844
     ip75c95 |    5.159993    1.406566      6.02    0.000      3.024262     8.803973
     ip75c96 |    4.541771    1.032254      6.66    0.000      2.909136     7.090655
     ip75c97 |    3.400744      .75548      5.51    0.000      2.200282     5.256172
     ip75c98 |    2.953165    .6538137      4.89    0.000      1.913536     4.557628
     ip75c99 |    2.402807    .5362211      3.93    0.000      1.551533     3.721147
     ip66c00 |    1.256956    .3203437      0.90    0.370      .7627564     2.071355
     ip66c01 |    1.005022    .2550506      0.02    0.984      .6111682     1.652685
     ip66c02 |    .7624045     .151056     -1.37    0.171      .5170541     1.124178
     ip66c03 |     .767413    .1763128     -1.15    0.249      .4891769     1.203905
     ip66c04 |    .7732252      .16262     -1.22    0.221      .5120194     1.167685
     ip67c00 |    .7836315    .1825235     -1.05    0.295      .4964208     1.237012
     ip67c01 |    .7862546    .1564591     -1.21    0.227       .532329     1.161305
     ip67c02 |    .5014618    .1022686     -3.38    0.001      .3362351     .7478813
     ip67c03 |    .4556413    .0853946     -4.19    0.000      .3155688     .6578881
     ip67c04 |    .4373039    .0767013     -4.72    0.000      .3100888     .6167093
     ip68c00 |    1.652611    .3137191      2.65    0.008      1.139161     2.397487
     ip68c01 |    1.392369    .2998255      1.54    0.124      .9129791     2.123477
     ip68c02 |     .949047    .1271534     -0.39    0.696       .729867     1.234047
     ip68c03 |    .8832549    .1297274     -0.85    0.398      .6623178     1.177893
     ip68c04 |    .9835259    .1397063     -0.12    0.907      .7445189     1.299259
     ip69c00 |    1.506812    .3324709      1.86    0.063      .9777899     2.322056
     ip69c01 |    1.451953    .2946219      1.84    0.066      .9755101     2.161093
     ip69c02 |    .9704792     .160463     -0.18    0.856      .7018512     1.341922
     ip69c03 |    .8079921    .1443117     -1.19    0.233      .5693482     1.146664
     ip69c04 |    .8563787    .1773193     -0.75    0.454       .570714      1.28503
     ip70c00 |    2.107014    .3644406      4.31    0.000      1.501201     2.957303
     ip70c01 |    1.824153    .2765896      3.96    0.000      1.355179      2.45542
     ip70c02 |    1.157994    .2118587      0.80    0.423      .8090515     1.657434
     ip70c03 |    1.096676    .1687554      0.60    0.549      .8111412     1.482725
     ip70c04 |    1.102881    .1852432      0.58    0.560      .7935204     1.532847
     ip71c00 |    2.159267     .368903      4.51    0.000      1.544834     3.018083
     ip71c01 |     1.90112    .3089791      3.95    0.000       1.38251     2.614272
     ip71c02 |    1.259637    .1910301      1.52    0.128      .9357427     1.695642
     ip71c03 |    1.179451    .1677577      1.16    0.246      .8925043     1.558653
     ip71c04 |    1.139738    .1407783      1.06    0.290      .8946766     1.451924
     ip72c00 |    2.541537    .4873215      4.86    0.000      1.745359     3.700908
     ip72c01 |    2.164183    .4123865      4.05    0.000      1.489694     3.144061
     ip72c02 |    1.448955    .2227642      2.41    0.016      1.071988     1.958482
     ip72c03 |    1.449617    .2359438      2.28    0.023      1.053681     1.994331
     ip72c04 |    1.180355    .1662484      1.18    0.239      .8956209     1.555611
     ip73c00 |    3.000476    .6763561      4.87    0.000      1.928926      4.66729
     ip73c01 |    2.677396    .6435147      4.10    0.000      1.671574     4.288444
     ip73c02 |    1.904679    .3223958      3.81    0.000       1.36692     2.653998
     ip73c03 |    1.923214    .3485057      3.61    0.000      1.348284     2.743304
     ip73c04 |    1.881169    .3231126      3.68    0.000      1.343458     2.634096
     ip74c00 |    2.885743    .5312748      5.76    0.000      2.011633     4.139679
     ip74c01 |    2.650765    .4783023      5.40    0.000      1.861148     3.775387
     ip74c02 |    1.462286     .158312      3.51    0.000      1.182711      1.80795
     ip74c03 |     1.52948    .1386451      4.69    0.000      1.280512     1.826854
     ip74c04 |    1.495737    .1399091      4.30    0.000      1.245189       1.7967
     ip75c00 |    2.564482    .4362554      5.54    0.000      1.837375     3.579326
     ip75c01 |    2.141633    .3208533      5.08    0.000      1.596689     2.872563
     ip75c02 |    1.387022    .1493618      3.04    0.002      1.123108     1.712952
     ip75c03 |    1.260193    .1349506      2.16    0.031      1.021608     1.554497
     ip75c04 |    1.108275    .1270066      0.90    0.370      .8853221     1.387375
       d1c95 |    3.356848    .9902132      4.11    0.000      1.882963     5.984415
       d1c00 |    1.823482    .3193572      3.43    0.001      1.293676     2.570262
       d2c95 |    6.013852    2.106481      5.12    0.000      3.026921     11.94825
       d2c00 |    4.435646     1.52593      4.33    0.000      2.260115     8.705288
       _cons |    3.343849    1.080431      3.74    0.000      1.775068     6.299098
-------------+----------------------------------------------------------------

.   * Column 2: Journal fixed effects, no age profile;
. xtpqml cit ip* d1c* d2c*, i(journal) irr fe cluster(journal);

Iteration 0:   log likelihood = -66457.898
Iteration 1:   log likelihood = -51175.419
Iteration 2:   log likelihood = -50191.158
Iteration 3:   log likelihood = -50186.983
Iteration 4:   log likelihood = -50186.982

Conditional fixed-effects Poisson regression    Number of obs     =     12,506
Group variable: journal                         Number of groups  =         59

                                                Obs per group:
                                                              min =         26
                                                              avg =      212.0
                                                              max =        260

                                                Wald chi2(254)    =   31929.67
Log likelihood  = -50186.982                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip66c80 |    .1317162     .049445      2.66    0.008      .0348058     .2286265
     ip66c81 |    .0464719    .0511657      0.91    0.364      -.053811     .1467547
     ip66c82 |    .0507002    .0510782      0.99    0.321     -.0494113     .1508117
     ip66c83 |   -.0079485    .0523108     -0.15    0.879     -.1104757     .0945787
     ip66c84 |   -.0655018    .0535626     -1.22    0.221     -.1704825     .0394789
     ip66c85 |   -.0305739    .0527978     -0.58    0.563     -.1340557     .0729079
     ip66c86 |   -.1265708    .0549379     -2.30    0.021     -.2342471    -.0188945
     ip66c87 |   -.0305739    .0527978     -0.58    0.563     -.1340557     .0729079
     ip66c88 |   -.1862513    .0563301     -3.31    0.001     -.2966562    -.0758464
     ip66c89 |   -.2993661    .0591041     -5.07    0.000      -.415208    -.1835242
     ip66c90 |   -.2051453     .056781     -3.61    0.000     -.3164339    -.0938566
     ip66c91 |   -.3421861     .060202     -5.68    0.000     -.4601799    -.2241924
     ip66c92 |   -.3804073    .0612049     -6.22    0.000     -.5003666     -.260448
     ip66c93 |   -.3675039    .0608639     -6.04    0.000     -.4867949    -.2482129
     ip66c94 |   -.4067246    .0619081     -6.57    0.000     -.5280623     -.285387
     ip66c95 |   -.5083883    .0647249     -7.85    0.000     -.6352468    -.3815297
     ip66c96 |   -.4081021    .0623452     -6.55    0.000     -.5302964    -.2859077
     ip66c97 |   -.4485979    .0629587     -7.13    0.000     -.5719947     -.325201
     ip66c98 |   -.4880534    .0640159     -7.62    0.000     -.6135222    -.3625845
     ip66c99 |   -.3976633    .0616036     -6.46    0.000     -.5184041    -.2769225
     ip67c80 |     .157359     .050229      3.13    0.002      .0589119     .2558061
     ip67c81 |    .1306359    .0507729      2.57    0.010      .0311228      .230149
     ip67c82 |    .0660974    .0521227      1.27    0.205     -.0360613     .1682561
     ip67c83 |    .0344921    .0528028      0.65    0.514     -.0689995     .1379836
     ip67c84 |    .0727419    .0519814      1.40    0.162     -.0291397     .1746236
     ip67c85 |    .0321958    .0528527      0.61    0.542     -.0713935     .1357852
     ip67c86 |   -.1542722     .057137     -2.70    0.007     -.2662588    -.0422857
     ip67c87 |   -.1682195    .0574765     -2.93    0.003     -.2808713    -.0555676
     ip67c88 |   -.2440575    .0593705     -4.11    0.000     -.3604216    -.1276934
     ip67c89 |   -.3294174    .0616027     -5.35    0.000     -.4501564    -.2086784
     ip67c90 |   -.3527907    .0622329     -5.67    0.000      -.474765    -.2308165
     ip67c91 |   -.4336784    .0644792     -6.73    0.000     -.5600552    -.3073016
     ip67c92 |   -.5216893    .0670415     -7.78    0.000     -.6530881    -.3902904
     ip67c93 |   -.4047955    .0636653     -6.36    0.000     -.5295773    -.2800137
     ip67c94 |   -.5542125    .0680205     -8.15    0.000     -.6875302    -.4208947
     ip67c95 |   -.6007325    .0694519     -8.65    0.000     -.7368556    -.4646093
     ip67c96 |   -.5185367    .0669693     -7.74    0.000      -.649794    -.3872793
     ip67c97 |   -.5266958     .066988     -7.86    0.000       -.65799    -.3954017
     ip67c98 |   -.6063661    .0693678     -8.74    0.000     -.7423245    -.4704076
     ip67c99 |   -.5325716    .0671115     -7.94    0.000     -.6641076    -.4010355
     ip68c80 |    .2504298    .0435819      5.75    0.000      .1650108     .3358488
     ip68c81 |    .1422563    .0453854      3.13    0.002      .0533025     .2312101
     ip68c82 |    .0573767    .0468878      1.22    0.221     -.0345218     .1492751
     ip68c83 |    .1531514    .0451982      3.39    0.001      .0645645     .2417382
     ip68c84 |    .0262323     .047459      0.55    0.580     -.0667857     .1192503
     ip68c85 |    .0859261    .0463737      1.85    0.064     -.0049647     .1768168
     ip68c86 |   -.0353814    .0486215     -0.73    0.467     -.1306778      .059915
     ip68c87 |    .0174061    .0476229      0.37    0.715      -.075933     .1107453
     ip68c88 |   -.0676729    .0492483     -1.37    0.169     -.1641977      .028852
     ip68c89 |   -.1951553    .0518447     -3.76    0.000     -.2967691    -.0935416
     ip68c90 |   -.1649154    .0512108     -3.22    0.001     -.2652868     -.064544
     ip68c91 |   -.2423021    .0528559     -4.58    0.000     -.3458977    -.1387065
     ip68c92 |    -.270276    .0534692     -5.05    0.000     -.3750737    -.1654782
     ip68c93 |   -.1110722    .0501101     -2.22    0.027     -.2092861    -.0128583
     ip68c94 |   -.2195738    .0523649     -4.19    0.000     -.3222071    -.1169406
     ip68c95 |   -.2869629    .0538399     -5.33    0.000     -.3924872    -.1814386
     ip68c96 |   -.1116387    .0505418     -2.21    0.027     -.2106989    -.0125785
     ip68c97 |   -.1755408     .051447     -3.41    0.001     -.2763751    -.0747065
     ip68c98 |   -.2421806    .0528326     -4.58    0.000     -.3457306    -.1386307
     ip68c99 |   -.2389055    .0527954     -4.53    0.000     -.3423826    -.1354283
     ip69c80 |    .4399969    .0393012     11.20    0.000      .3629678     .5170259
     ip69c81 |    .2568328    .0419068      6.13    0.000      .1746971     .3389686
     ip69c82 |    .3181265    .0410002      7.76    0.000      .2377676     .3984855
     ip69c83 |    .3322944    .0407957      8.15    0.000      .2523363     .4122525
     ip69c84 |    .2504917    .0420026      5.96    0.000       .168168     .3328153
     ip69c85 |    .2415459    .0421385      5.73    0.000       .158956     .3241359
     ip69c86 |    .1331856    .0438471      3.04    0.002      .0472468     .2191244
     ip69c87 |    .1473904    .0436164      3.38    0.001      .0619038      .232877
     ip69c88 |   -.0397382    .0468256     -0.85    0.396     -.1315147     .0520383
     ip69c89 |   -.0195355     .046461     -0.42    0.674     -.1105973     .0715264
     ip69c90 |   -.0212035    .0464909     -0.46    0.648      -.112324      .069917
     ip69c91 |   -.0921062     .047792     -1.93    0.054     -.1857767     .0015644
     ip69c92 |   -.0814109    .0475921     -1.71    0.087     -.1746896     .0118679
     ip69c93 |   -.1473688    .0488456     -3.02    0.003     -.2431045    -.0516332
     ip69c94 |   -.2261497    .0504097     -4.49    0.000     -.3249509    -.1273485
     ip69c95 |   -.2343802    .0505774     -4.63    0.000     -.3335101    -.1352504
     ip69c96 |   -.2434744    .0510673     -4.77    0.000     -.3435645    -.1433843
     ip69c97 |   -.3273883    .0524976     -6.24    0.000     -.4302817    -.2244948
     ip69c98 |   -.3440528    .0528406     -6.51    0.000     -.4476184    -.2404872
     ip69c99 |   -.2461513    .0508263     -4.84    0.000      -.345769    -.1465335
     ip70c80 |    .5854636    .0368672     15.88    0.000      .5132051      .657722
     ip70c81 |    .5097518    .0377818     13.49    0.000      .4357007     .5838028
     ip70c82 |    .4329031     .038759     11.17    0.000      .3569368     .5088693
     ip70c83 |    .4783654    .0381749     12.53    0.000      .4035441     .5531868
     ip70c84 |    .4155645    .0389865     10.66    0.000      .3391525     .4919766
     ip70c85 |    .4764312    .0381994     12.47    0.000      .4015618     .5513006
     ip70c86 |     .363838    .0396807      9.17    0.000      .2860651     .4416108
     ip70c87 |    .4135048    .0390137     10.60    0.000      .3370394     .4899702
     ip70c88 |    .3115748    .0404066      7.71    0.000      .2323794     .3907702
     ip70c89 |    .2612424    .0411293      6.35    0.000      .1806305     .3418543
     ip70c90 |    .2743612    .0409386      6.70    0.000       .194123     .3545995
     ip70c91 |    .2069751    .0419352      4.94    0.000      .1247835     .2891666
     ip70c92 |    .1877806    .0422271      4.45    0.000       .105017     .2705442
     ip70c93 |     .119618    .0432928      2.76    0.006      .0347657     .2044702
     ip70c94 |    .1000643    .0436071      2.29    0.022       .014596     .1855325
     ip70c95 |     .095824    .0436757      2.19    0.028      .0102211     .1814268
     ip70c96 |    .1234685    .0436415      2.83    0.005      .0379328     .2090042
     ip70c97 |    .0469085    .0445405      1.05    0.292     -.0403892     .1342062
     ip70c98 |   -.0066948      .04543     -0.15    0.883      -.095736     .0823464
     ip70c99 |    .0367524    .0447499      0.82    0.411     -.0509557     .1244605
     ip71c80 |    .6957155    .0357113     19.48    0.000      .6257226     .7657084
     ip71c81 |    .5917473    .0368939     16.04    0.000      .5194365     .6640581
     ip71c82 |     .601267    .0367821     16.35    0.000      .5291754     .6733587
     ip71c83 |    .6384649    .0363521     17.56    0.000      .5672161     .7097136
     ip71c84 |    .5307965    .0376273     14.11    0.000      .4570484     .6045446
     ip71c85 |    .5177731    .0377879     13.70    0.000      .4437101      .591836
     ip71c86 |    .5427397    .0374812     14.48    0.000      .4692779     .6162015
     ip71c87 |    .4489808    .0386601     11.61    0.000      .3732083     .5247533
     ip71c88 |    .4225565    .0390059     10.83    0.000      .3461062     .4990068
     ip71c89 |    .3399358    .0401269      8.47    0.000      .2612886      .418583
     ip71c90 |    .3675162    .0397459      9.25    0.000      .2896156     .4454167
     ip71c91 |    .3609659    .0398358      9.06    0.000      .2828893     .4390426
     ip71c92 |    .2250847    .0417888      5.39    0.000      .1431802     .3069892
     ip71c93 |     .240029    .0415655      5.77    0.000       .158562     .3214959
     ip71c94 |    .1508802    .0429296      3.51    0.000      .0667398     .2350207
     ip71c95 |    .1735933    .0425747      4.08    0.000      .0901485     .2570381
     ip71c96 |    .1622018    .0431813      3.76    0.000      .0775679     .2468356
     ip71c97 |    .1672111    .0427626      3.91    0.000       .083398     .2510243
     ip71c98 |    .0714474    .0442695      1.61    0.107     -.0153192      .158214
     ip71c99 |    .0563845    .0445684      1.27    0.206      -.030968      .143737
     ip72c80 |     .877673    .0337907     25.97    0.000      .8114445     .9439015
     ip72c81 |    .7749837    .0348162     22.26    0.000      .7067451     .8432223
     ip72c82 |    .7749837    .0348162     22.26    0.000      .7067451     .8432223
     ip72c83 |    .8639158    .0339238     25.47    0.000      .7974265     .9304052
     ip72c84 |    .7749837    .0348162     22.26    0.000      .7067451     .8432223
     ip72c85 |    .7247144     .035346     20.50    0.000      .6554375     .7939913
     ip72c86 |    .6540414    .0361229     18.11    0.000      .5832419     .7248409
     ip72c87 |    .6175833    .0365386     16.90    0.000      .5459689     .6891978
     ip72c88 |    .5620617    .0371921     15.11    0.000      .4891665     .6349568
     ip72c89 |    .4928139    .0380423     12.95    0.000      .4182525     .5673754
     ip72c90 |    .4225227    .0389465     10.85    0.000       .346189     .4988565
     ip72c91 |    .3965473    .0392915     10.09    0.000      .3195373     .4735572
     ip72c92 |    .3965473    .0392915     10.09    0.000      .3195373     .4735572
     ip72c93 |    .3997002    .0392493     10.18    0.000      .3227729     .4766274
     ip72c94 |     .301658    .0406029      7.43    0.000      .2220778     .3812383
     ip72c95 |    .3513297    .0399063      8.80    0.000      .2731148     .4295445
     ip72c96 |    .3690413    .0401608      9.19    0.000      .2903277      .447755
     ip72c97 |    .1851841    .0424191      4.37    0.000      .1020442     .2683241
     ip72c98 |    .2344134    .0416793      5.62    0.000      .1527235     .3161034
     ip72c99 |    .2037464    .0421959      4.83    0.000      .1210439     .2864488
     ip73c80 |     .922189    .0333909     27.62    0.000      .8567441     .9876339
     ip73c81 |    .8416783    .0341651     24.64    0.000       .774716     .9086406
     ip73c82 |    .8788425    .0338022     26.00    0.000      .8125915     .9450935
     ip73c83 |    .8736171    .0338526     25.81    0.000      .8072672      .939967
     ip73c84 |    .8437046     .034145     24.71    0.000      .7767816     .9106277
     ip73c85 |    .7889249     .034697     22.74    0.000      .7209201     .8569297
     ip73c86 |    .7211023    .0354104     20.36    0.000      .6516992     .7905054
     ip73c87 |    .7422352    .0351845     21.10    0.000      .6732749     .8111954
     ip73c88 |    .6613831    .0360671     18.34    0.000      .5906928     .7320733
     ip73c89 |    .6309656    .0364121     17.33    0.000      .5595991     .7023321
     ip73c90 |    .5944124    .0368364     16.14    0.000      .5222144     .6666105
     ip73c91 |    .5410665    .0374748     14.44    0.000      .4676172     .6145157
     ip73c92 |    .4827793    .0381991     12.64    0.000      .4079103     .5576482
     ip73c93 |     .464215    .0384358     12.08    0.000      .3888821     .5395478
     ip73c94 |    .4493116     .038628     11.63    0.000      .3736021      .525021
     ip73c95 |    .3766655    .0395923      9.51    0.000      .2990662     .4542649
     ip73c96 |    .4739535    .0388463     12.20    0.000      .3978161     .5500909
     ip73c97 |    .3996663     .039423     10.14    0.000      .3223987     .4769339
     ip73c98 |    .4474623    .0387989     11.53    0.000      .3714179     .5235067
     ip73c99 |    .4459926    .0388982     11.47    0.000      .3697534     .5222317
     ip74c80 |    1.069135    .0315463     33.89    0.000      1.007306     1.130965
     ip74c81 |    .9903957    .0321951     30.76    0.000      .9272945     1.053497
     ip74c82 |    1.035773    .0318166     32.55    0.000      .9734138     1.098133
     ip74c83 |    1.008258    .0320446     31.46    0.000       .945452     1.071064
     ip74c84 |    .9898494    .0321997     30.74    0.000      .9267391      1.05296
     ip74c85 |    .9816189    .0322698     30.42    0.000      .9183713     1.044867
     ip74c86 |    .9185119    .0328212     27.99    0.000      .8541836     .9828402
     ip74c87 |     .821851    .0337163     24.38    0.000      .7557684     .8879337
     ip74c88 |    .7707959    .0342147     22.53    0.000      .7037363     .8378555
     ip74c89 |    .7361903     .034563     21.30    0.000      .6684481     .8039326
     ip74c90 |    .7097885    .0348345     20.38    0.000      .6415142     .7780628
     ip74c91 |    .6669459    .0352859     18.90    0.000      .5977869     .7361049
     ip74c92 |    .6253375    .0357373     17.50    0.000      .5552936     .6953813
     ip74c93 |    .6054719    .0359575     16.84    0.000      .5349965     .6759473
     ip74c94 |    .4916937    .0372781     13.19    0.000        .41863     .5647574
     ip74c95 |    .5209381    .0369288     14.11    0.000       .448559     .5933173
     ip74c96 |    .5037849    .0376193     13.39    0.000      .4300524     .5775174
     ip74c97 |    .4956142    .0373724     13.26    0.000      .4223657     .5688627
     ip74c98 |    .4289835    .0381749     11.24    0.000       .354162      .503805
     ip74c99 |    .3812987    .0388425      9.82    0.000      .3051688     .4574286
     ip75c80 |    1.061698    .0315468     33.65    0.000      .9998671     1.123528
     ip75c81 |    1.075242    .0314389     34.20    0.000      1.013623     1.136861
     ip75c82 |    1.048991     .031649     33.14    0.000      .9869602     1.111022
     ip75c83 |     1.01782    .0319038     31.90    0.000      .9552893      1.08035
     ip75c84 |    .9964856    .0320817     31.06    0.000      .9336066     1.059364
     ip75c85 |    1.015707    .0319213     31.82    0.000       .953142     1.078271
     ip75c86 |     .912166    .0328125     27.80    0.000      .8478546     .9764773
     ip75c87 |     .832221    .0335481     24.81    0.000       .766468      .897974
     ip75c88 |      .75909     .034259     22.16    0.000      .6919436     .8262363
     ip75c89 |    .6246794    .0356653     17.52    0.000      .5547767      .694582
     ip75c90 |      .68535    .0350141     19.57    0.000      .6167237     .7539763
     ip75c91 |    .6112986    .0358126     17.07    0.000      .5411072       .68149
     ip75c92 |     .519232    .0368641     14.09    0.000      .4469797     .5914842
     ip75c93 |    .5321799    .0367122     14.50    0.000      .4602254     .6041345
     ip75c94 |    .4537083    .0376536     12.05    0.000      .3799086      .527508
     ip75c95 |    .3964408    .0383728     10.33    0.000      .3212316       .47165
     ip75c96 |     .439104    .0382961     11.47    0.000       .364045      .514163
     ip75c97 |    .3215499    .0394616      8.15    0.000      .2442066     .3988932
     ip75c98 |    .2603988    .0402828      6.46    0.000      .1814459     .3393516
     ip75c99 |    .2471374    .0405248      6.10    0.000      .1677104     .3265645
     ip66c00 |   -.3498203    .0564357     -6.20    0.000     -.4604322    -.2392084
     ip66c01 |   -.4384883    .0587702     -7.46    0.000     -.5536757    -.3233008
     ip66c02 |    -.362908    .0562431     -6.45    0.000     -.4731423    -.2526736
     ip66c03 |   -.2800273    .0540627     -5.18    0.000     -.3859883    -.1740663
     ip66c04 |    -.261007    .0535689     -4.87    0.000     -.3660002    -.1560138
     ip67c00 |   -.7532246    .0711473    -10.59    0.000     -.8926707    -.6137784
     ip67c01 |   -.6142275    .0664714     -9.24    0.000     -.7445091    -.4839459
     ip67c02 |    -.715096    .0689154    -10.38    0.000     -.8501678    -.5800242
     ip67c03 |   -.7342821    .0695336    -10.56    0.000     -.8705654    -.5979987
     ip67c04 |   -.7581781    .0703298    -10.78    0.000     -.8960219    -.6203342
     ip68c00 |   -.2037474    .0482932     -4.22    0.000     -.2984003    -.1090945
     ip68c01 |   -.2158042    .0485136     -4.45    0.000     -.3108892    -.1207193
     ip68c02 |   -.2175126    .0476296     -4.57    0.000     -.3108649    -.1241602
     ip68c03 |   -.2222455    .0477244     -4.66    0.000     -.3157836    -.1287074
     ip68c04 |   -.1045698     .045184     -2.31    0.021     -.1931288    -.0160109
     ip69c00 |   -.3083735    .0485875     -6.35    0.000     -.4036032    -.2131437
     ip69c01 |   -.1980593    .0460488     -4.30    0.000     -.2883133    -.1078053
     ip69c02 |   -.2043285    .0453172     -4.51    0.000     -.2931487    -.1155083
     ip69c03 |   -.2858531    .0469419     -6.09    0.000     -.3778576    -.1938486
     ip69c04 |   -.2187313     .045498     -4.81    0.000     -.3079057    -.1295569
     ip70c00 |     .015059    .0413541      0.36    0.716     -.0659936     .0961116
     ip70c01 |    .0356261    .0407329      0.87    0.382     -.0442088     .1154611
     ip70c02 |   -.0245546    .0408769     -0.60    0.548     -.1046719     .0555628
     ip70c03 |    .0180778    .0399906      0.45    0.651     -.0603023     .0964578
     ip70c04 |    .0322913    .0397305      0.81    0.416     -.0455789     .1101616
     ip71c00 |     .024216    .0412588      0.59    0.557     -.0566497     .1050817
     ip71c01 |    .0577846    .0404723      1.43    0.153     -.0215395     .1371088
     ip71c02 |    .0290929     .040042      0.73    0.467      -.049388     .1075738
     ip71c03 |    .0640052     .039309      1.63    0.103     -.0130391     .1410495
     ip71c04 |    .0386294    .0397554      0.97    0.331     -.0392897     .1165484
     ip72c00 |    .1851733     .038499      4.81    0.000      .1097167       .26063
     ip72c01 |    .1849993    .0382327      4.84    0.000      .1100646     .2599339
     ip72c02 |    .1712569    .0375142      4.57    0.000      .0977305     .2447833
     ip72c03 |    .2718766    .0357866      7.60    0.000      .2017362     .3420171
     ip72c04 |    .0752181    .0390409      1.93    0.054     -.0013006     .1517368
     ip73c00 |    .3622417    .0357175     10.14    0.000      .2922366     .4322467
     ip73c01 |    .4001851    .0349463     11.45    0.000      .3316917     .4686785
     ip73c02 |    .4420958    .0333702     13.25    0.000      .3766915     .5075001
     ip73c03 |    .5383133    .0319449     16.85    0.000      .4757026     .6009241
     ip73c04 |    .5252031    .0321165     16.35    0.000      .4622558     .5881503
     ip74c00 |    .3338907    .0354263      9.42    0.000      .2644565      .403325
     ip74c01 |    .4182994    .0338934     12.34    0.000      .3518695     .4847292
     ip74c02 |     .241623    .0354208      6.82    0.000      .1721994     .3110465
     ip74c03 |    .4235801    .0326248     12.98    0.000      .3596367     .4875235
     ip74c04 |      .41256    .0327734     12.59    0.000      .3483253     .4767947
     ip75c00 |    .2364772    .0367174      6.44    0.000      .1645125     .3084419
     ip75c01 |    .2147651    .0367744      5.84    0.000      .1426886     .2868416
     ip75c02 |    .1971765    .0360171      5.47    0.000      .1265843     .2677687
     ip75c03 |     .251682    .0350287      7.19    0.000      .1830269     .3203371
     ip75c04 |    .1454891    .0366892      3.97    0.000      .0735795     .2173987
       d1c95 |    .0321379    .0203478      1.58    0.114      -.007743     .0720188
       d1c00 |    .0042765    .0255718      0.17    0.867     -.0458433     .0543963
       d2c95 |    .0327733    .0154115      2.13    0.033      .0025673     .0629794
       d2c00 |    .0650256    .0186252      3.49    0.000      .0285208     .1015304
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     ip66c80 |    1.140784    .1979077      0.76    0.448      .8119585     1.602778
     ip66c81 |    1.047569     .174756      0.28    0.781      .7554132     1.452715
     ip66c82 |    1.052007    .1674853      0.32    0.750      .7700217     1.437258
     ip66c83 |     .992083    .1606131     -0.05    0.961       .722342     1.362552
     ip66c84 |    .9365974    .1479967     -0.41    0.678      .6871477     1.276603
     ip66c85 |    .9698888    .1468755     -0.20    0.840      .7208084     1.305041
     ip66c86 |    .8811117    .1383035     -0.81    0.420      .6477722     1.198504
     ip66c87 |    .9698888    .1733853     -0.17    0.864      .6832099      1.37686
     ip66c88 |     .830065    .1329322     -1.16    0.245      .6064499     1.136133
     ip66c89 |     .741288    .1312204     -1.69    0.091      .5239743      1.04873
     ip66c90 |     .814529    .1485794     -1.12    0.261      .5696887     1.164596
     ip66c91 |     .710216    .1129967     -2.15    0.031      .5199514     .9701038
     ip66c92 |    .6835829    .1029934     -2.52    0.012      .5087954     .9184155
     ip66c93 |    .6924606    .1253739     -2.03    0.042      .4856018     .9874381
     ip66c94 |    .6658275    .1304951     -2.08    0.038      .4534562     .9776607
     ip66c95 |    .6014642    .0883474     -3.46    0.001      .4510028     .8021219
     ip66c96 |     .664911    .1171726     -2.32    0.021      .4707195     .9392146
     ip66c97 |    .6385228    .1003377     -2.85    0.004      .4692652     .8688294
     ip66c98 |    .6138201    .1027896     -2.91    0.004      .4420791     .8522799
     ip66c99 |    .6718882    .0925026     -2.89    0.004      .5129882     .8800081
     ip67c80 |    1.170416    .1875553      0.98    0.326      .8549444     1.602295
     ip67c81 |    1.139553    .1872207      0.80    0.427      .8258248     1.572465
     ip67c82 |    1.068331    .1653321      0.43    0.669      .7888165      1.44689
     ip67c83 |    1.035094    .1645623      0.22    0.828      .7579719     1.413534
     ip67c84 |    1.075453    .1521274      0.51    0.607       .815052     1.419049
     ip67c85 |     1.03272    .1704956      0.20    0.845      .7472302     1.427284
     ip67c86 |    .8570387    .1249603     -1.06    0.290      .6440079     1.140538
     ip67c87 |    .8451683    .1370959     -1.04    0.300      .6149909     1.161496
     ip67c88 |    .7834426    .1095973     -1.74    0.081      .5955674     1.030584
     ip67c89 |    .7193427    .1157446     -2.05    0.041      .5247769     .9860455
     ip67c90 |    .7027242    .1017277     -2.44    0.015      .5291312     .9332683
     ip67c91 |    .6481207    .0947699     -2.97    0.003      .4866211     .8632187
     ip67c92 |    .5935171    .0786711     -3.94    0.000      .4577263     .7695921
     ip67c93 |    .6671132    .0850579     -3.17    0.001      .5196011     .8565033
     ip67c94 |    .5745245    .0920902     -3.46    0.001      .4196333     .7865878
     ip67c95 |    .5484098    .0732528     -4.50    0.000      .4220924     .7125295
     ip67c96 |    .5953912    .0787666     -3.92    0.000      .4594029     .7716335
     ip67c97 |     .590553    .0808968     -3.84    0.000      .4514994     .7724327
     ip67c98 |     .545329     .082251     -4.02    0.000      .4057638     .7328985
     ip67c99 |    .5870933    .0861694     -3.63    0.000      .4403254     .7827813
     ip68c80 |    1.284577    .1733341      1.86    0.063      .9860606     1.673466
     ip68c81 |    1.152872    .1451883      1.13    0.259      .9007082     1.475632
     ip68c82 |    1.059055    .1232864      0.49    0.622      .8430018      1.33048
     ip68c83 |    1.165501    .1301169      1.37    0.170      .9364496     1.450578
     ip68c84 |    1.026579     .112734      0.24    0.811      .8277853     1.273114
     ip68c85 |    1.089726    .1319922      0.71    0.478       .859441     1.381715
     ip68c86 |    .9652372    .1253779     -0.27    0.785      .7482877     1.245086
     ip68c87 |    1.017558    .1161957      0.15    0.879      .8135048     1.272796
     ip68c88 |    .9345661    .1106122     -0.57    0.567      .7410792      1.17857
     ip68c89 |    .8227069      .10289     -1.56    0.119      .6438601     1.051232
     ip68c90 |    .8479654    .1126815     -1.24    0.215      .6535316     1.100246
     ip68c91 |     .784819    .0975319     -1.95    0.051        .61516      1.00127
     ip68c92 |    .7631689    .0988183     -2.09    0.037      .5921115     .9836437
     ip68c93 |    .8948741    .1108897     -0.90    0.370      .7019142      1.14088
     ip68c94 |    .8028609    .1181052     -1.49    0.136      .6017608     1.071166
     ip68c95 |    .7505396    .0911989     -2.36    0.018      .5914842     .9523664
     ip68c96 |    .8943673    .1156845     -0.86    0.388      .6940884     1.152437
     ip68c97 |    .8390032    .1200769     -1.23    0.220      .6337834     1.110673
     ip68c98 |    .7849144    .0912712     -2.08    0.037      .6249469     .9858287
     ip68c99 |    .7874893      .10472     -1.80    0.072      .6068094     1.021967
     ip69c80 |    1.552702    .2187209      3.12    0.002      1.178105     2.046409
     ip69c81 |    1.292829    .2013913      1.65    0.099      .9526746     1.754436
     ip69c82 |     1.37455     .199234      2.19    0.028      1.034626     1.826156
     ip69c83 |    1.394163    .2141232      2.16    0.030      1.031767     1.883848
     ip69c84 |    1.284657    .1961859      1.64    0.101      .9523492     1.732918
     ip69c85 |    1.273216     .175254      1.75    0.079      .9721582     1.667505
     ip69c86 |    1.142462    .1816776      0.84    0.402      .8365296     1.560279
     ip69c87 |    1.158806    .1641467      1.04    0.298      .8778834     1.529624
     ip69c88 |     .961041     .155549     -0.25    0.806      .6997952     1.319815
     ip69c89 |    .9806541    .1479086     -0.13    0.897      .7296795     1.317952
     ip69c90 |    .9790197    .1630585     -0.13    0.899      .7063524     1.356942
     ip69c91 |    .9120083    .1410592     -0.60    0.552      .6735107     1.234961
     ip69c92 |    .9218149    .1397806     -0.54    0.591      .6848109     1.240843
     ip69c93 |    .8629756    .1338761     -0.95    0.342      .6367207     1.169629
     ip69c94 |    .7975987    .1148017     -1.57    0.116       .601544     1.057551
     ip69c95 |     .791061    .1193809     -1.55    0.120       .588509     1.063327
     ip69c96 |    .7838996    .1279087     -1.49    0.136      .5693379     1.079321
     ip69c97 |    .7208038    .1321937     -1.79    0.074       .503163     1.032584
     ip69c98 |    .7088915    .1075847     -2.27    0.023      .5264989     .9544696
     ip69c99 |    .7818039    .1290977     -1.49    0.136      .5656407     1.080575
     ip70c80 |    1.795823    .2306662      4.56    0.000      1.396144      2.30992
     ip70c81 |    1.664878    .1953352      4.34    0.000      1.322859     2.095325
     ip70c82 |    1.541727    .2109202      3.16    0.002      1.179116     2.015851
     ip70c83 |    1.613435    .1837696      4.20    0.000      1.290625     2.016986
     ip70c84 |    1.515226    .1704031      3.70    0.000      1.215488     1.888878
     ip70c85 |    1.610317    .1952451      3.93    0.000      1.269715     2.042286
     ip70c86 |    1.438841     .176448      2.97    0.003      1.131431     1.829774
     ip70c87 |    1.512108    .1799471      3.47    0.001       1.19753     1.909323
     ip70c88 |    1.365574    .1694788      2.51    0.012      1.070716     1.741631
     ip70c89 |    1.298542    .1550131      2.19    0.029      1.027648     1.640847
     ip70c90 |     1.31569    .1464808      2.46    0.014      1.057757     1.636519
     ip70c91 |    1.229952    .1573235      1.62    0.106      .9572177     1.580395
     ip70c92 |    1.206569    .1684844      1.34    0.179      .9176793     1.586402
     ip70c93 |    1.127066    .1580084      0.85    0.394      .8562798     1.483485
     ip70c94 |    1.105242    .1443325      0.77    0.444      .8556571     1.427628
     ip70c95 |    1.100565    .1477056      0.71    0.475      .8460131     1.431708
     ip70c96 |    1.131414     .156157      0.89    0.371      .8632557     1.482873
     ip70c97 |    1.048026    .1295647      0.38    0.704      .8225083     1.335377
     ip70c98 |    .9933276    .1346283     -0.05    0.961      .7615999     1.295562
     ip70c99 |    1.037436    .1407469      0.27    0.786      .7952076      1.35345
     ip71c80 |    2.005143    .2449782      5.69    0.000      1.578156     2.547656
     ip71c81 |    1.807143    .2432122      4.40    0.000      1.388144     2.352613
     ip71c82 |    1.824429    .2181728      5.03    0.000      1.443234     2.306307
     ip71c83 |    1.893572    .2429002      4.98    0.000      1.472627     2.434841
     ip71c84 |    1.700286    .2219303      4.07    0.000      1.316493     2.195964
     ip71c85 |    1.678286    .1981751      4.38    0.000      1.331541     2.115327
     ip71c86 |    1.720715    .2139242      4.37    0.000      1.348606     2.195496
     ip71c87 |    1.566715     .206462      3.41    0.001      1.210092     2.028436
     ip71c88 |    1.525857    .1841639      3.50    0.000       1.20442     1.933081
     ip71c89 |    1.404857     .170095      2.81    0.005      1.108082     1.781118
     ip71c90 |    1.444143    .1778291      2.98    0.003      1.134475     1.838339
     ip71c91 |    1.434715    .1786761      2.90    0.004      1.123981     1.831354
     ip71c92 |    1.252429    .1492037      1.89    0.059      .9916266     1.581823
     ip71c93 |    1.271286    .1549649      1.97    0.049      1.001118     1.614364
     ip71c94 |    1.162857    .1522913      1.15    0.249      .8996022      1.50315
     ip71c95 |    1.189572    .1635522      1.26    0.207      .9085741     1.557474
     ip71c96 |    1.176098     .126357      1.51    0.131      .9527794     1.451758
     ip71c97 |    1.182004    .1466977      1.35    0.178      .9267803     1.507513
     ip71c98 |    1.074062     .136259      0.56    0.573      .8376122     1.377258
     ip71c99 |    1.058004    .1081395      0.55    0.581      .8659354     1.292675
     ip72c80 |    2.405296    .3096707      6.82    0.000      1.868875     3.095685
     ip72c81 |    2.170557    .2342249      7.18    0.000      1.756782     2.681788
     ip72c82 |    2.170557    .2510167      6.70    0.000      1.730346      2.72276
     ip72c83 |    2.372433    .2840493      7.22    0.000      1.876205     2.999905
     ip72c84 |    2.170557    .2826769      5.95    0.000      1.681578     2.801723
     ip72c85 |    2.064142    .2356189      6.35    0.000       1.65035     2.581683
     ip72c86 |    1.923298    .2242769      5.61    0.000      1.530338     2.417162
     ip72c87 |    1.854441    .2665806      4.30    0.000      1.399106     2.457963
     ip72c88 |    1.754286    .2216683      4.45    0.000      1.369443     2.247277
     ip72c89 |    1.636916     .208747      3.86    0.000      1.274903     2.101723
     ip72c90 |    1.525806    .1846234      3.49    0.000      1.203659     1.934172
     ip72c91 |    1.486683    .1906036      3.09    0.002      1.156347     1.911387
     ip72c92 |    1.486683    .2037289      2.89    0.004       1.13651     1.944748
     ip72c93 |    1.491377     .211643      2.82    0.005      1.129257      1.96962
     ip72c94 |    1.352099    .1899945      2.15    0.032      1.026595     1.780811
     ip72c95 |    1.420956    .1780022      2.80    0.005      1.111607     1.816394
     ip72c96 |    1.446347    .1848528      2.89    0.004      1.125857     1.858069
     ip72c97 |     1.20344    .1516025      1.47    0.142      .9401451     1.540473
     ip72c98 |    1.264167    .1711202      1.73    0.083      .9695811     1.648257
     ip72c99 |    1.225987    .1591942      1.57    0.117      .9505119       1.5813
     ip73c80 |    2.514789    .3454523      6.71    0.000      1.921204     3.291771
     ip73c81 |    2.320258    .2988422      6.53    0.000      1.802619      2.98654
     ip73c82 |    2.408111    .3197939      6.62    0.000      1.856257     3.124028
     ip73c83 |     2.39556    .3235184      6.47    0.000      1.838455     3.121484
     ip73c84 |    2.324964    .3047293      6.44    0.000      1.798252     3.005951
     ip73c85 |    2.201029    .2695046      6.44    0.000      1.731412     2.798021
     ip73c86 |    2.056699    .2647111      5.60    0.000      1.598142     2.646831
     ip73c87 |    2.100625    .2741877      5.69    0.000      1.626463     2.713021
     ip73c88 |     1.93747    .2336718      5.48    0.000      1.529588     2.454119
     ip73c89 |    1.879424     .233829      5.07    0.000      1.472728     2.398431
     ip73c90 |    1.811966    .2260408      4.76    0.000      1.418939     2.313857
     ip73c91 |    1.717838     .221505      4.20    0.000      1.334212     2.211768
     ip73c92 |    1.620572    .2365417      3.31    0.001      1.217378     2.157304
     ip73c93 |    1.590765    .2198653      3.36    0.001      1.213273     2.085708
     ip73c94 |    1.567233    .2326364      3.03    0.002       1.17161     2.096447
     ip73c95 |    1.457417    .1709503      3.21    0.001      1.158085     1.834117
     ip73c96 |    1.606332     .247307      3.08    0.002      1.187918     2.172122
     ip73c97 |    1.491327     .213885      2.79    0.005      1.125885     1.975384
     ip73c98 |    1.564337    .2267898      3.09    0.002      1.177409      2.07842
     ip73c99 |     1.56204    .2376769      2.93    0.003      1.159244     2.104792
     ip74c80 |     2.91286     .363927      8.56    0.000      2.280196     3.721063
     ip74c81 |      2.6923    .3605635      7.40    0.000      2.070747     3.500416
     ip74c82 |    2.817284    .3578243      8.16    0.000      2.196439     3.613616
     ip74c83 |    2.740823    .3652663      7.57    0.000      2.110777     3.558931
     ip74c84 |    2.690829    .3305315      8.06    0.000      2.115084     3.423297
     ip74c85 |    2.668773    .3448696      7.60    0.000      2.071648     3.438012
     ip74c86 |    2.505559    .3336122      6.90    0.000      1.930048     3.252678
     ip74c87 |    2.274707    .3006533      6.22    0.000      1.755578     2.947343
     ip74c88 |    2.161486    .2977078      5.60    0.000      1.650114     2.831333
     ip74c89 |    2.087966    .2614853      5.88    0.000      1.633517     2.668844
     ip74c90 |    2.033561     .222154      6.50    0.000      1.641605     2.519102
     ip74c91 |    1.948278    .2337955      5.56    0.000      1.539947     2.464882
     ip74c92 |    1.868877    .2600921      4.49    0.000      1.422717      2.45495
     ip74c93 |    1.832117    .2604637      4.26    0.000       1.38657     2.420831
     ip74c94 |    1.635083    .2132211      3.77    0.000       1.26631     2.111251
     ip74c95 |    1.683606    .2184608      4.01    0.000      1.305541     2.171153
     ip74c96 |    1.654973    .1817485      4.59    0.000      1.334481     2.052436
     ip74c97 |    1.641506    .1955055      4.16    0.000       1.29976     2.073107
     ip74c98 |    1.535696    .1794983      3.67    0.000      1.221274     1.931066
     ip74c99 |    1.464185    .1520877      3.67    0.000      1.194483     1.794783
     ip75c80 |    2.891275    .3712262      8.27    0.000      2.248015     3.718603
     ip75c81 |    2.930702    .3688649      8.54    0.000       2.29001     3.750644
     ip75c82 |    2.854769    .3623424      8.26    0.000      2.226035     3.661087
     ip75c83 |    2.767155    .3687348      7.64    0.000      2.131117      3.59302
     ip75c84 |    2.708745    .3448517      7.83    0.000      2.110577     3.476443
     ip75c85 |    2.761314    .3422718      8.19    0.000      2.165745     3.520662
     ip75c86 |    2.489709    .3246397      7.00    0.000      1.928227     3.214689
     ip75c87 |    2.298418    .3100006      6.17    0.000      1.764504     2.993887
     ip75c88 |    2.136331    .2648395      6.12    0.000      1.675505     2.723902
     ip75c89 |    1.867647    .2192186      5.32    0.000      1.483827     2.350749
     ip75c90 |    1.984466    .2383317      5.71    0.000      1.568251     2.511145
     ip75c91 |    1.842823     .216752      5.20    0.000      1.463409     2.320607
     ip75c92 |    1.680736    .1844657      4.73    0.000      1.355432     2.084114
     ip75c93 |     1.70264    .1939893      4.67    0.000      1.361889     2.128649
     ip75c94 |    1.574139    .1915467      3.73    0.000      1.240126     1.998114
     ip75c95 |    1.486524     .177823      3.31    0.001      1.175841     1.879298
     ip75c96 |    1.551317    .1523671      4.47    0.000      1.279668     1.880631
     ip75c97 |    1.379264    .1621644      2.73    0.006       1.09539     1.736704
     ip75c98 |    1.297447    .1338688      2.52    0.012      1.059898     1.588238
     ip75c99 |    1.280355    .1116632      2.83    0.005      1.079182     1.519029
     ip66c00 |    .7048147    .1190454     -2.07    0.038      .5061793     .9813989
     ip66c01 |    .6450108    .1016308     -2.78    0.005      .4736394     .8783875
     ip66c02 |    .6956505    .0953061     -2.65    0.008      .5318314     .9099303
     ip66c03 |    .7557631    .1432912     -1.48    0.140      .5211942     1.095902
     ip66c04 |    .7702756     .134895     -1.49    0.136      .5464858     1.085709
     ip67c00 |    .4708458    .0732153     -4.84    0.000      .3471516     .6386138
     ip67c01 |    .5410587    .0556734     -5.97    0.000      .4422402     .6619582
     ip67c02 |    .4891452    .0824639     -4.24    0.000      .3515083     .6806751
     ip67c03 |    .4798498     .064161     -5.49    0.000      .3692247     .6236199
     ip67c04 |    .4685193    .0452587     -7.85    0.000      .3877054     .5661781
     ip68c00 |    .8156684     .069183     -2.40    0.016      .6907434     .9631868
     ip68c01 |    .8058931    .0996296     -1.75    0.081      .6324796     1.026853
     ip68c02 |    .8045175    .0820913     -2.13    0.033      .6586894     .9826307
     ip68c03 |    .8007188    .1089283     -1.63    0.102      .6133157     1.045384
     ip68c04 |    .9007119    .1130619     -0.83    0.405      .7042694     1.151948
     ip69c00 |    .7346409    .1113893     -2.03    0.042      .5457734      .988867
     ip69c01 |    .8203212    .1243995     -1.31    0.192      .6093987     1.104247
     ip69c02 |    .8151945    .1246708     -1.34    0.182      .6040651     1.100117
     ip69c03 |     .751373      .12451     -1.73    0.085       .543004       1.0397
     ip69c04 |    .8035376    .1562331     -1.12    0.261      .5489158     1.176269
     ip70c00 |    1.015173    .1336614      0.11    0.909      .7842738     1.314051
     ip70c01 |    1.036268    .1093767      0.34    0.736      .8426148     1.274428
     ip70c02 |    .9757444    .1660886     -0.14    0.885      .6989511     1.362151
     ip70c03 |    1.018242    .1527851      0.12    0.904      .7588048     1.366382
     ip70c04 |    1.032818    .1686771      0.20    0.843      .7499081     1.422459
     ip71c00 |    1.024512    .1016327      0.24    0.807      .8434838     1.244391
     ip71c01 |    1.059487    .1145452      0.53    0.593      .8571737      1.30955
     ip71c02 |     1.02952    .1457733      0.21    0.837      .7800283     1.358812
     ip71c03 |    1.066098    .1363493      0.50    0.617      .8297211     1.369816
     ip71c04 |    1.039385    .1170622      0.34    0.732      .8335061     1.296117
     ip72c00 |    1.203427    .1489661      1.50    0.135       .944178      1.53386
     ip72c01 |    1.203218    .1570347      1.42    0.156      .9316481     1.553948
     ip72c02 |    1.186796    .1621685      1.25    0.210      .9079551      1.55127
     ip72c03 |    1.312425    .1924295      1.85    0.064      .9846235     1.749359
     ip72c04 |    1.078119    .1399489      0.58    0.562      .8359373     1.390464
     ip73c00 |    1.436546      .23454      2.22    0.027       1.04315     1.978301
     ip73c01 |    1.492101    .2518315      2.37    0.018      1.071853     2.077117
     ip73c02 |    1.555965    .2478905      2.77    0.006      1.138648     2.126229
     ip73c03 |    1.713115    .3101572      2.97    0.003      1.201372     2.442842
     ip73c04 |    1.690802    .2894587      3.07    0.002      1.208844     2.364913
     ip74c00 |    1.396391    .1564712      2.98    0.003      1.121053     1.739352
     ip74c01 |    1.519375    .1440658      4.41    0.000      1.261697      1.82968
     ip74c02 |    1.273314    .1246162      2.47    0.014      1.051067     1.542555
     ip74c03 |     1.52742    .1442557      4.48    0.000       1.26931     1.838016
     ip74c04 |     1.51068    .1461215      4.27    0.000      1.249797      1.82602
     ip75c00 |    1.266779    .1186358      2.53    0.012      1.054349     1.522008
     ip75c01 |    1.239571    .1254297      2.12    0.034      1.016576     1.511481
     ip75c02 |    1.217959    .1209082      1.99    0.047      1.002612      1.47956
     ip75c03 |    1.286187    .1135073      2.85    0.004      1.081894     1.529056
     ip75c04 |    1.156605    .1142154      1.47    0.141      .9530781     1.403595
       d1c95 |     1.03266    .0542834      0.61    0.541      .9315637     1.144727
       d1c00 |    1.004286    .0556542      0.08    0.938      .9009205      1.11951
       d2c95 |    1.033316    .0603262      0.56    0.575       .921593     1.158584
       d2c00 |    1.067186    .0935373      0.74    0.458      .8987392     1.267205
-------------+----------------------------------------------------------------
Wald chi2(254) = -3.8e+15                                Prob > chi2 =   1.0000

.  * Column 3: Volume fixed effects, no age profile;
. xtpqml cit ip* d1c* d2c*, i(volume) irr fe cluster(journal);
warning: existing panel variable is not volume
note: 13 groups (338 obs) dropped because of all zero outcomes

Iteration 0:   log likelihood = -35747.421
Iteration 1:   log likelihood = -29953.582
Iteration 2:   log likelihood = -29881.824
Iteration 3:   log likelihood = -29881.801
Iteration 4:   log likelihood = -29881.801

Conditional fixed-effects Poisson regression    Number of obs     =     12,168
Group variable: volume                          Number of groups  =        468

                                                Obs per group:
                                                              min =         26
                                                              avg =       26.0
                                                              max =         26

                                                Wald chi2(254)    =   11835.14
Log likelihood  = -29881.801                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip66c80 |    .4945669    .0729325      6.78    0.000      .3516219     .6375119
     ip66c81 |    .4093226    .0741098      5.52    0.000        .26407     .5545751
     ip66c82 |    .4135509    .0740495      5.58    0.000      .2684166     .5586852
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     ip71c02 |    .0517274    .0543927      0.95    0.342     -.0548803     .1583351
     ip71c03 |    .0882301    .0538549      1.64    0.101     -.0173236     .1937837
     ip71c04 |    .0626315    .0541798      1.16    0.248     -.0435589     .1688219
     ip72c00 |    .0297578     .050938      0.58    0.559     -.0700788     .1295944
     ip72c01 |     .025866    .0507041      0.51    0.610     -.0735122     .1252442
     ip72c02 |    .0187918    .0501535      0.37    0.708     -.0795072     .1170908
     ip72c03 |    .1202862    .0488555      2.46    0.014      .0245311     .2160412
     ip72c04 |   -.0765995    .0512879     -1.49    0.135     -.1771219      .023923
     ip73c00 |   -.0561278    .0456462     -1.23    0.219     -.1455927     .0333371
     ip73c01 |   -.0215766    .0451256     -0.48    0.633     -.1100212      .066868
     ip73c02 |    .0281786    .0439534      0.64    0.521     -.0579685     .1143256
     ip73c03 |    .1271649    .0428946      2.96    0.003       .043093     .2112367
     ip73c04 |     .113746    .0430242      2.64    0.008      .0294201      .198072
     ip74c00 |    .0585225    .0464325      1.26    0.208     -.0324836     .1495285
     ip74c01 |    .1391107    .0452102      3.08    0.002      .0505004      .227721
     ip74c02 |   -.0302336    .0463915     -0.65    0.515     -.1211594     .0606921
     ip74c03 |    .1534488    .0442842      3.47    0.001      .0666532     .2402443
     ip74c04 |    .1422755    .0443926      3.20    0.001      .0552675     .2292835
     ip75c00 |    .1148008    .0493312      2.33    0.020      .0181134     .2114882
     ip75c01 |    .0882971    .0493193      1.79    0.073     -.0083669     .1849611
     ip75c02 |    .0755602    .0485366      1.56    0.120     -.0195697     .1706901
     ip75c03 |     .133345    .0478283      2.79    0.005      .0396031     .2270868
     ip75c04 |    .0268769    .0490504      0.55    0.584     -.0692602     .1230139
       d1c95 |    .0272511    .0205332      1.33    0.184     -.0129932     .0674955
       d1c00 |    .0154523    .0257272      0.60    0.548     -.0349721     .0658766
       d2c95 |    .0192926    .0155989      1.24    0.216     -.0112808      .049866
       d2c00 |    .0522778    .0187748      2.78    0.005      .0154798     .0890758
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     ip66c80 |    1.639788    .2310694      3.51    0.000       1.24406     2.161395
     ip66c81 |    1.505797    .2395423      2.57    0.010      1.102446     2.056723
     ip66c82 |    1.512178    .2030265      3.08    0.002      1.162304      1.96737
     ip66c83 |    1.426041    .1937451      2.61    0.009      1.092662     1.861136
     ip66c84 |    1.346285    .2425852      1.65    0.099      .9457148     1.916522
     ip66c85 |    1.394139    .1913894      2.42    0.016      1.065251     1.824569
     ip66c86 |    1.266529     .169774      1.76    0.078      .9738999     1.647084
     ip66c87 |    1.394139    .2540464      1.82    0.068        .97543      1.99258
     ip66c88 |    1.193153    .1660112      1.27    0.204      .9083702     1.567218
     ip66c89 |    1.065543    .1638407      0.41    0.680      .7882937     1.440303
     ip66c90 |    1.170821      .20289      0.91    0.363      .8336564      1.64435
     ip66c91 |     1.02088    .1512615      0.14    0.889      .7635787     1.364882
     ip66c92 |    .9825966    .1232822     -0.14    0.889      .7683846     1.256527
     ip66c93 |    .9953576     .146095     -0.03    0.975      .7465224     1.327136
     ip66c94 |    .9570746     .108457     -0.39    0.699      .7664547     1.195102
     ip66c95 |    .8645574    .1180105     -1.07    0.286      .6616166     1.129747
     ip66c96 |    .9553158    .1001685     -0.44    0.663      .7778488     1.173272
     ip66c97 |    .9226815    .1098862     -0.68    0.499       .730598     1.165266
     ip66c98 |    .8872908    .0906499     -1.17    0.242      .7262784     1.083999
     ip66c99 |    .9725453    .1132117     -0.24    0.811      .7741471     1.221789
     ip67c80 |    3.028054    .4017815      8.35    0.000      2.334645     3.927412
     ip67c81 |    2.948207    .3701029      8.61    0.000      2.305167     3.770626
     ip67c82 |    2.763944     .367718      7.64    0.000      2.129534     3.587352
     ip67c83 |    2.677954    .2801492      9.42    0.000      2.181506     3.287381
     ip67c84 |     2.78237    .2710308     10.51    0.000       2.29879     3.367677
     ip67c85 |    2.671812    .3230022      8.13    0.000      2.108153     3.386179
     ip67c86 |    2.217297    .2719288      6.49    0.000      1.743543     2.819779
     ip67c87 |    2.186587    .2749266      6.22    0.000      1.709001     2.797635
     ip67c88 |    2.026892    .2022461      7.08    0.000       1.66685     2.464704
     ip67c89 |    1.861056    .2098382      5.51    0.000      1.492054     2.321316
     ip67c90 |    1.818061    .1745995      6.22    0.000       1.50613     2.194596
     ip67c91 |    1.676793    .1681266      5.16    0.000      1.377629     2.040923
     ip67c92 |    1.535524    .1683486      3.91    0.000       1.23861     1.903614
     ip67c93 |    1.725929    .1906607      4.94    0.000      1.389928     2.143157
     ip67c94 |    1.486388    .1998368      2.95    0.003       1.14207     1.934512
     ip67c95 |    1.418825    .1455204      3.41    0.001      1.160449     1.734728
     ip67c96 |    1.543491    .1385394      4.84    0.000      1.294502     1.840372
     ip67c97 |    1.536158    .1555435      4.24    0.000      1.259643     1.873373
     ip67c98 |    1.418624    .1345636      3.69    0.000       1.17795     1.708473
     ip67c99 |    1.527297    .1587913      4.07    0.000      1.245733       1.8725
     ip68c80 |    1.502016    .2012242      3.04    0.002      1.155153     1.953033
     ip68c81 |    1.348017     .196656      2.05    0.041      1.012786      1.79421
     ip68c82 |    1.238319    .1559083      1.70    0.090      .9675285     1.584899
     ip68c83 |    1.362784    .1960875      2.15    0.031      1.027898     1.806776
     ip68c84 |    1.200347    .1626136      1.35    0.178      .9204342     1.565384
     ip68c85 |    1.274182     .167577      1.84    0.065      .9846544     1.648843
     ip68c86 |    1.128622    .1453339      0.94    0.347       .876876     1.452642
     ip68c87 |    1.189799    .1510812      1.37    0.171      .9276578     1.526018
     ip68c88 |    1.092759    .1200676      0.81    0.419      .8810449     1.355348
     ip68c89 |    .9619654     .098992     -0.38    0.706      .7862592     1.176937
     ip68c90 |    .9914994    .1016769     -0.08    0.934      .8109665     1.212222
     ip68c91 |    .9176643    .0804329     -0.98    0.327      .7728165     1.089661
     ip68c92 |    .8923495    .1098007     -0.93    0.355      .7011281     1.135723
     ip68c93 |    1.046348    .0969812      0.49    0.625      .8725339     1.254788
     ip68c94 |    .9387601    .1039434     -0.57    0.568      .7556245     1.166281
     ip68c95 |    .8775825    .1082799     -1.06    0.290      .6890694     1.117668
     ip68c96 |    1.047321    .0940497      0.51    0.607      .8782973     1.248872
     ip68c97 |    .9865559     .095793     -0.14    0.889       .815589     1.193362
     ip68c98 |    .9233839    .0806961     -0.91    0.362      .7780263     1.095898
     ip68c99 |    .9266024    .1034042     -0.68    0.495      .7445667     1.153143
     ip69c80 |    2.141364    .4107391      3.97    0.000      1.470347      3.11861
     ip69c81 |    1.782967    .3166769      3.26    0.001      1.258808     2.525383
     ip69c82 |     1.89567    .3214345      3.77    0.000      1.359662     2.642984
     ip69c83 |    1.922719     .345087      3.64    0.000      1.352519     2.733306
     ip69c84 |    1.771697    .3152281      3.21    0.001      1.250086     2.510955
     ip69c85 |    1.755918    .2941942      3.36    0.001      1.264417     2.438475
     ip69c86 |    1.575593    .2623021      2.73    0.006      1.136939     2.183487
     ip69c87 |    1.598133     .274953      2.73    0.006      1.140688     2.239026
     ip69c88 |    1.325391    .2334816      1.60    0.110      .9384174     1.871941
     ip69c89 |     1.35244    .2319075      1.76    0.078       .966406     1.892677
     ip69c90 |    1.350186    .1763475      2.30    0.022      1.045246      1.74409
     ip69c91 |    1.257769    .1816898      1.59    0.112      .9476359       1.6694
     ip69c92 |    1.271294    .1968257      1.55    0.121      .9385561     1.721994
     ip69c93 |    1.190147    .1664092      1.24    0.213      .9048649     1.565373
     ip69c94 |    1.099985    .1683479      0.62    0.534      .8149179     1.484771
     ip69c95 |    1.090968    .1671558      0.57    0.570      .8079656     1.473097
     ip69c96 |    1.082965    .1192763      0.72    0.469      .8726989     1.343893
     ip69c97 |    .9994264    .1269528     -0.00    0.996      .7791596     1.281962
     ip69c98 |    .9831731    .1244623     -0.13    0.893      .7671395     1.260044
     ip69c99 |    1.085486    .1271493      0.70    0.484      .8628153     1.365621
     ip70c80 |    1.924028    .2900344      4.34    0.000      1.431853      2.58538
     ip70c81 |    1.783735    .2639224      3.91    0.000      1.334707     2.383826
     ip70c82 |    1.651792    .2296845      3.61    0.000       1.25775     2.169284
     ip70c83 |    1.728619    .2247215      4.21    0.000      1.339808     2.230263
     ip70c84 |    1.623399    .2114395      3.72    0.000      1.257652     2.095511
     ip70c85 |    1.725279    .2199719      4.28    0.000      1.343791     2.215067
     ip70c86 |    1.541561     .196769      3.39    0.001      1.200359      1.97975
     ip70c87 |    1.620059    .2153268      3.63    0.000      1.248519     2.102164
     ip70c88 |    1.463063    .1585417      3.51    0.000      1.183108     1.809263
     ip70c89 |    1.391246    .1851468      2.48    0.013      1.071831      1.80585
     ip70c90 |    1.409618    .1349352      3.59    0.000      1.168478     1.700523
     ip70c91 |    1.317759    .1312682      2.77    0.006      1.084036     1.601873
     ip70c92 |    1.292707      .17655      1.88    0.060      .9891179     1.689475
     ip70c93 |    1.207528    .1307822      1.74    0.082      .9765789     1.493094
     ip70c94 |    1.184146    .1441189      1.39    0.165      .9328419      1.50315
     ip70c95 |    1.179135    .1303534      1.49    0.136       .949431     1.464414
     ip70c96 |    1.213131     .120732      1.94    0.052       .998149     1.474417
     ip70c97 |    1.127915    .1089467      1.25    0.213      .9333786     1.362997
     ip70c98 |    1.069525    .1123954      0.64    0.522      .8704402     1.314144
     ip70c99 |    1.117433    .0949171      1.31    0.191      .9460602     1.319849
     ip71c80 |    2.029984    .3666202      3.92    0.000      1.424832     2.892156
     ip71c81 |    1.829531    .3282138      3.37    0.001      1.287171      2.60042
     ip71c82 |    1.847031    .3151535      3.60    0.000      1.322014      2.58055
     ip71c83 |    1.917031    .3308627      3.77    0.000      1.366844     2.688679
     ip71c84 |     1.72135    .2686512      3.48    0.001      1.267717      2.33731
     ip71c85 |    1.699078     .254669      3.54    0.000      1.266571     2.279276
     ip71c86 |    1.742032    .2862517      3.38    0.001      1.262369     2.403953
     ip71c87 |    1.586124    .2625704      2.79    0.005      1.146641     2.194052
     ip71c88 |    1.544761    .2340668      2.87    0.004      1.147848      2.07892
     ip71c89 |    1.422262    .1984309      2.52    0.012      1.081986     1.869551
     ip71c90 |    1.462034    .2161524      2.57    0.010       1.09424      1.95345
     ip71c91 |    1.452489      .20893      2.60    0.009      1.095654     1.925537
     ip71c92 |    1.267945    .1902928      1.58    0.114      .9448268     1.701564
     ip71c93 |    1.287035    .1748597      1.86    0.063      .9861528      1.67972
     ip71c94 |    1.177264    .1653307      1.16    0.245      .8939927     1.550292
     ip71c95 |    1.204309    .1742248      1.29    0.199      .9069771     1.599114
     ip71c96 |    1.194622    .1496177      1.42    0.156      .9345954     1.526994
     ip71c97 |    1.204247    .1380363      1.62    0.105      .9619375     1.507593
     ip71c98 |    1.094566    .1195737      0.83    0.408      .8835964     1.355906
     ip71c99 |    1.078706    .1083536      0.75    0.451      .8859346     1.313422
     ip72c80 |    2.043173    .2999871      4.87    0.000      1.532245      2.72447
     ip72c81 |    1.843774    .2332886      4.84    0.000      1.438822     2.362699
     ip72c82 |    1.843774     .245027      4.60    0.000       1.42098     2.392365
     ip72c83 |    2.015257    .2626272      5.38    0.000      1.560998     2.601708
     ip72c84 |    1.843774    .2332225      4.84    0.000      1.438923     2.362532
     ip72c85 |     1.75338    .2202532      4.47    0.000      1.370728     2.242853
     ip72c86 |    1.633741    .2040744      3.93    0.000      1.278961     2.086934
     ip72c87 |     1.57525    .1949608      3.67    0.000      1.235949     2.007698
     ip72c88 |    1.490173    .1891858      3.14    0.002      1.161909      1.91118
     ip72c89 |    1.390474    .1491296      3.07    0.002      1.126862     1.715754
     ip72c90 |    1.296092    .1572292      2.14    0.033      1.021825     1.643975
     ip72c91 |    1.262859    .1300269      2.27    0.023      1.032079     1.545242
     ip72c92 |    1.262859    .1316956      2.24    0.025       1.02941     1.549249
     ip72c93 |    1.266847     .139714      2.14    0.032      1.020586     1.572529
     ip72c94 |    1.148537    .1183545      1.34    0.179      .9384913     1.405593
     ip72c95 |    1.207027    .1198692      1.89    0.058      .9935386      1.46639
     ip72c96 |    1.232123    .0944958      2.72    0.006      1.060162     1.431975
     ip72c97 |    1.028408    .0748475      0.38    0.700       .891692     1.186085
     ip72c98 |    1.079624    .0807905      1.02    0.306      .9323421     1.250172
     ip72c99 |    1.048339    .0869133      0.57    0.569      .8911116     1.233307
     ip73c80 |    1.648073    .3448503      2.39    0.017      1.093622     2.483624
     ip73c81 |    1.520587    .3115093      2.05    0.041      1.017731     2.271901
     ip73c82 |    1.578161    .2996265      2.40    0.016      1.087787     2.289596
     ip73c83 |    1.569936    .3042641      2.33    0.020      1.073776     2.295358
     ip73c84 |    1.523671    .2865604      2.24    0.025       1.05391     2.202818
     ip73c85 |     1.44245    .2799955      1.89    0.059      .9859911     2.110223
     ip73c86 |    1.347863    .2540969      1.58    0.113      .9314907     1.950351
     ip73c87 |     1.37665     .227894      1.93    0.053      .9952074     1.904292
     ip73c88 |    1.269726    .2251555      1.35    0.178       .896953     1.797422
     ip73c89 |    1.231685    .2063612      1.24    0.214      .8869237     1.710462
     ip73c90 |    1.187476    .1802379      1.13    0.258      .8819168     1.598904
     ip73c91 |    1.125789    .1807726      0.74    0.461      .8218189     1.542191
     ip73c92 |    1.062046    .1426762      0.45    0.654      .8161917     1.381957
     ip73c93 |    1.042512    .1424521      0.30    0.761      .7975722     1.362674
     ip73c94 |     1.02709    .1535116      0.18    0.858      .7662767     1.376675
     ip73c95 |    .9551216    .1381388     -0.32    0.751      .7193659     1.268141
     ip73c96 |    1.052337    .1140273      0.47    0.638      .8509847     1.301331
     ip73c97 |    .9809924    .1044538     -0.18    0.857      .7962173     1.208647
     ip73c98 |    1.029113    .1067229      0.28    0.782      .8398274      1.26106
     ip73c99 |    1.029392    .1034433      0.29    0.773      .8453644     1.253481
     ip74c80 |    2.197661    .2502814      6.91    0.000       1.75801     2.747262
     ip74c81 |    2.031256    .2491704      5.78    0.000      1.597163      2.58333
     ip74c82 |    2.125552    .2372083      6.76    0.000      1.707965     2.645236
     ip74c83 |    2.067865    .2319852      6.48    0.000      1.659699      2.57641
     ip74c84 |    2.030146    .2209756      6.51    0.000      1.640123     2.512917
     ip74c85 |    2.013506     .212619      6.63    0.000      1.637077     2.476491
     ip74c86 |    1.890366    .2023046      5.95    0.000      1.532679     2.331527
     ip74c87 |    1.716195    .1909079      4.86    0.000      1.380002      2.13429
     ip74c88 |    1.630773     .183191      4.35    0.000      1.308503     2.032415
     ip74c89 |    1.575305    .1661244      4.31    0.000      1.281152     1.936994
     ip74c90 |    1.534258    .1447017      4.54    0.000      1.275318     1.845774
     ip74c91 |    1.469915    .1432062      3.95    0.000      1.214406     1.779182
     ip74c92 |    1.410009    .1484664      3.26    0.001      1.147083       1.7332
     ip74c93 |    1.382274     .148989      3.00    0.003      1.119044     1.707424
     ip74c94 |    1.233619    .1279325      2.02    0.043      1.006716     1.511663
     ip74c95 |    1.270228    .1276894      2.38    0.017      1.043073     1.546851
     ip74c96 |    1.251287    .0962285      2.91    0.004      1.076209     1.454847
     ip74c97 |    1.244969    .1041175      2.62    0.009      1.056749     1.466713
     ip74c98 |    1.164961    .0969896      1.83    0.067       .989564     1.371446
     ip74c99 |    1.110977    .0808453      1.45    0.148      .9633042     1.281288
     ip75c80 |     2.53558    .3404947      6.93    0.000      1.948822        3.299
     ip75c81 |    2.570156    .3387919      7.16    0.000       1.98498     3.327843
     ip75c82 |    2.503565    .3475844      6.61    0.000      1.907136     3.286519
     ip75c83 |    2.426729    .3430207      6.27    0.000      1.839514     3.201397
     ip75c84 |    2.375505    .3271723      6.28    0.000      1.813519     3.111644
     ip75c85 |    2.421607    .3001528      7.14    0.000      1.899324     3.087509
     ip75c86 |    2.183416    .2833205      6.02    0.000      1.693107     2.815714
     ip75c87 |    2.015658    .2637103      5.36    0.000      1.559744     2.604835
     ip75c88 |    1.873512    .2432004      4.84    0.000      1.452654       2.4163
     ip75c89 |    1.637882    .1749869      4.62    0.000      1.328442     2.019402
     ip75c90 |     1.74033    .1918422      5.03    0.000      1.402171     2.160042
     ip75c91 |    1.616112    .1818981      4.26    0.000      1.296183     2.015008
     ip75c92 |    1.473966    .1444803      3.96    0.000       1.21633     1.786173
     ip75c93 |    1.493175    .1479831      4.05    0.000      1.229564     1.813302
     ip75c94 |    1.380482    .1281769      3.47    0.001      1.150793     1.656015
     ip75c95 |    1.303647    .1181161      2.93    0.003      1.091534     1.556978
     ip75c96 |    1.365685    .1229737      3.46    0.001      1.144732     1.629286
     ip75c97 |    1.217364    .0957745      2.50    0.012      1.043406     1.420324
     ip75c98 |    1.145315    .0936678      1.66    0.097      .9756879     1.344433
     ip75c99 |    1.130724    .0837164      1.66    0.097      .9779925     1.307308
     ip66c00 |    1.017644     .062222      0.29    0.775      .9027153     1.147205
     ip66c01 |    .9301276    .0667206     -1.01    0.313      .8081343     1.070537
     ip66c02 |    1.010297    .0705487      0.15    0.883       .881069     1.158479
     ip66c03 |    1.098145    .0532954      1.93    0.054      .9985019     1.207731
     ip66c04 |    1.119058    .1000313      1.26    0.208      .9392139     1.333338
     ip67c00 |    1.224172    .1254314      1.97    0.048      1.001443     1.496437
     ip67c01 |    1.403194    .0957268      4.97    0.000      1.227575     1.603937
     ip67c02 |    1.278745    .1537152      2.05    0.041      1.010329     1.618471
     ip67c03 |    1.254303    .0981138      2.90    0.004       1.07602     1.462127
     ip67c04 |    1.224248    .0962619      2.57    0.010      1.049397     1.428232
     ip68c00 |     .959119    .0703723     -0.57    0.569      .8306505     1.107456
     ip68c01 |    .9447308    .0744779     -0.72    0.471      .8094752     1.102586
     ip68c02 |    .9517629    .0529987     -0.89    0.375      .8533551     1.061519
     ip68c03 |    .9474223     .082635     -0.62    0.536      .7985481     1.124051
     ip68c04 |    1.065393    .0858319      0.79    0.432      .9097754      1.24763
     ip69c00 |    1.020621    .0791692      0.26    0.792      .8766717     1.188206
     ip69c01 |     1.13518    .0725468      1.98    0.047      1.001535     1.286658
     ip69c02 |    1.134404    .0589694      2.43    0.015      1.024519     1.256075
     ip69c03 |    1.048588    .0560933      0.89    0.375      .9442141     1.164499
     ip69c04 |    1.121095    .0673645      1.90    0.057      .9965417     1.261216
     ip70c00 |    1.092785    .0638647      1.52    0.129      .9745154     1.225408
     ip70c01 |    1.112465    .0901301      1.32    0.188      .9491249     1.303915
     ip70c02 |    1.056699    .0533996      1.09    0.275      .9570535     1.166718
     ip70c03 |    1.103069    .0352368      3.07    0.002      1.036124      1.17434
     ip70c04 |    1.118565    .0498794      2.51    0.012      1.024953     1.220726
     ip71c00 |     1.04681    .0885656      0.54    0.589      .8868536     1.235618
     ip71c01 |     1.07798    .0881559      0.92    0.359      .9183333      1.26538
     ip71c02 |    1.053089    .0534236      1.02    0.308      .9534176     1.163179
     ip71c03 |    1.092239    .0648838      1.49    0.137      .9721936     1.227108
     ip71c04 |    1.064634    .0554616      1.20    0.229      .9612971      1.17908
     ip72c00 |    1.030205     .047777      0.64    0.521      .9406936     1.128234
     ip72c01 |    1.026203    .0529344      0.50    0.616      .9275261     1.135379
     ip72c02 |    1.018969     .044409      0.43    0.666      .9355433     1.109835
     ip72c03 |     1.12782     .052593      2.58    0.010       1.02931     1.235757
     ip72c04 |    .9262608    .0547321     -1.30    0.195      .8249667     1.039992
     ip73c00 |    .9454183    .0686874     -0.77    0.440      .8199394       1.0901
     ip73c01 |    .9786545    .0581631     -0.36    0.717      .8710459     1.099557
     ip73c02 |    1.028579    .0599573      0.48    0.629      .9175297     1.153069
     ip73c03 |    1.135604    .0504299      2.86    0.004      1.040943     1.238874
     ip73c04 |    1.120468     .049214      2.59    0.010      1.028045     1.221199
     ip74c00 |    1.060269    .0753768      0.82    0.410      .9223637     1.218792
     ip74c01 |    1.149251    .0528206      3.03    0.002      1.050251     1.257584
     ip74c02 |    .9702188    .0516008     -0.57    0.570      .8741759     1.076814
     ip74c03 |    1.165848    .0575621      3.11    0.002      1.058315     1.284307
     ip74c04 |    1.152894    .0517645      3.17    0.002      1.055774     1.258949
     ip75c00 |     1.12165    .0736166      1.75    0.080      .9862589     1.275627
     ip75c01 |    1.092313    .0591391      1.63    0.103      .9823401     1.214596
     ip75c02 |    1.078488    .0555904      1.47    0.143      .9748559     1.193137
     ip75c03 |    1.142644    .0525572      2.90    0.004      1.044141      1.25044
     ip75c04 |    1.027241    .0414009      0.67    0.505      .9492192     1.111676
       d1c95 |    1.027626    .0526248      0.53    0.595      .9294904     1.136122
       d1c00 |    1.015572    .0558933      0.28    0.779      .9117251     1.131248
       d2c95 |     1.01948    .0586099      0.34    0.737       .910842     1.141075
       d2c00 |    1.053668    .0904919      0.61    0.543      .8904314     1.246831
-------------+----------------------------------------------------------------
Wald chi2(254) = -8.7e+16                                Prob > chi2 =   1.0000

.  * Column 4: Volume fixed effects and age profile;
. xtpqml cit ip* ia1j* ia2j* d1c* d2c*, i(volume) irr fe cluster(journal);
note: 13 groups (338 obs) dropped because of all zero outcomes

Iteration 0:   log likelihood = -35747.421
Iteration 1:   log likelihood = -28338.722
Iteration 2:   log likelihood = -28176.841
Iteration 3:   log likelihood = -28173.393
Iteration 4:   log likelihood = -28172.911
Iteration 5:   log likelihood = -28172.907
Iteration 6:   log likelihood = -28172.907

Conditional fixed-effects Poisson regression    Number of obs     =     12,168
Group variable: volume                          Number of groups  =        468

                                                Obs per group:
                                                              min =         26
                                                              avg =       26.0
                                                              max =         26

                                                Wald chi2(370)    =   14698.90
Log likelihood  = -28172.907                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip66c80 |     .527625    .0805515      6.55    0.000       .369747      .685503
     ip66c81 |    .4417603    .0817654      5.40    0.000      .2815031     .6020174
     ip66c82 |    .4450255    .0818248      5.44    0.000      .2846518     .6053992
     ip66c83 |    .3851261    .0826742      4.66    0.000      .2230875     .5471646
     ip66c84 |    .3260848    .0835022      3.91    0.000      .1624236     .4897461
     ip66c85 |    .3593325    .0829964      4.33    0.000      .1966625     .5220024
     ip66c86 |    .2615017    .0843073      3.10    0.002      .0962625      .426741
     ip66c87 |    .3555437    .0828086      4.29    0.000      .1932419     .5178455
     ip66c88 |    .1978161    .0849358      2.33    0.020      .0313451     .3642872
     ip66c89 |    .0825757    .0865853      0.95    0.340     -.0871283     .2522798
     ip66c90 |    .1746096    .0847474      2.06    0.039      .0085078     .3407114
     ip66c91 |    .0353288    .0867682      0.41    0.684     -.1347337     .2053913
     ip66c92 |   -.0051818     .087118     -0.06    0.953       -.17593     .1655664
     ip66c93 |    .0053819    .0864899      0.06    0.950     -.1641352      .174899
     ip66c94 |   -.0362338    .0868088     -0.42    0.676      -.206376     .1339083
     ip66c95 |   -.1403566    .0884036     -1.59    0.112     -.3136244     .0329112
     ip66c96 |   -.0439565    .0864552     -0.51    0.611     -.2134056     .1254927
     ip66c97 |   -.0605008    .0861515     -0.70    0.483     -.2293547     .1083531
     ip66c98 |   -.1023007    .0864623     -1.18    0.237     -.2717637     .0671623
     ip66c99 |   -.0126019    .0842171     -0.15    0.881     -.1776643     .1524606
     ip67c80 |    1.031817    .0980701     10.52    0.000      .8396035     1.224031
     ip67c81 |     1.00741    .0985154     10.23    0.000      .8143234     1.200497
     ip67c82 |    .9449841    .0993543      9.51    0.000      .7502533     1.139715
     ip67c83 |     .915351    .0998122      9.17    0.000      .7197228     1.110979
     ip67c84 |    .9554894    .0994361      9.61    0.000      .7605981     1.150381
     ip67c85 |    .9167976    .0999011      9.18    0.000      .7209951       1.1126
     ip67c86 |    .7321913    .1021867      7.17    0.000       .531909     .9324736
     ip67c87 |     .720147    .1022765      7.04    0.000      .5196888     .9206053
     ip67c88 |    .6462787    .1031976      6.26    0.000      .4440152     .8485423
     ip67c89 |     .562973     .104289      5.40    0.000      .3585704     .7673757
     ip67c90 |    .5417478    .1044001      5.19    0.000      .3371274     .7463683
     ip67c91 |    .4631046    .1054437      4.39    0.000      .2564389     .6697704
     ip67c92 |    .3774296    .1066757      3.54    0.000       .168349     .5865102
     ip67c93 |    .4967391    .1041815      4.77    0.000      .2925471     .7009311
     ip67c94 |    .3497999    .1064657      3.29    0.001       .141131     .5584688
     ip67c95 |    .3057961     .106926      2.86    0.004      .0962249     .5153673
     ip67c96 |    .3917604    .1048078      3.74    0.000      .1863408       .59718
     ip67c97 |     .401998    .1042297      3.86    0.000      .1977116     .6062845
     ip67c98 |    .3248743    .1052784      3.09    0.002      .1185325     .5312161
     ip67c99 |     .402096    .1033363      3.89    0.000      .1995605     .6046314
     ip68c80 |    .4277694     .067959      6.29    0.000      .2945723     .5609666
     ip68c81 |     .318944    .0692475      4.61    0.000      .1832215     .4546666
     ip68c82 |    .2330622    .0703485      3.31    0.001      .0951818     .3709426
     ip68c83 |    .3275477    .0693233      4.72    0.000      .1916765      .463419
     ip68c84 |    .1991115    .0708789      2.81    0.005      .0601915     .3380316
     ip68c85 |     .257114    .0701842      3.66    0.000      .1195554     .3946726
     ip68c86 |     .133989    .0716778      1.87    0.062     -.0064968     .2744749
     ip68c87 |    .1848744    .0709496      2.61    0.009      .0458157     .3239331
     ip68c88 |    .0978438    .0719519      1.36    0.174     -.0431793     .2388669
     ip68c89 |   -.0316113    .0736113     -0.43    0.668     -.1758868     .1126641
     ip68c90 |   -.0033432    .0729768     -0.05    0.963     -.1463751     .1396886
     ip68c91 |   -.0826853    .0739086     -1.12    0.263     -.2275436     .0621729
     ip68c92 |   -.1125888    .0740747     -1.52    0.129     -.2577726     .0325949
     ip68c93 |    .0447145    .0713627      0.63    0.531     -.0951539     .1845829
     ip68c94 |   -.0656604    .0726087     -0.90    0.366     -.2079707       .07665
     ip68c95 |   -.1349029    .0732982     -1.84    0.066     -.2785647     .0087589
     ip68c96 |    .0394147    .0704626      0.56    0.576     -.0986894     .1775188
     ip68c97 |   -.0073533    .0705077     -0.10    0.917     -.1455458     .1308392
     ip68c98 |   -.0753725    .0710893     -1.06    0.289      -.214705     .0639601
     ip68c99 |   -.0734345    .0706172     -1.04    0.298     -.2118416     .0649726
     ip69c80 |    .7090119    .0654686     10.83    0.000      .5806958      .837328
     ip69c81 |    .5244403    .0671333      7.81    0.000      .3928616     .6560191
     ip69c82 |    .5842191    .0666456      8.77    0.000       .453596     .7148421
     ip69c83 |     .596848    .0665894      8.96    0.000      .4663352     .7273608
     ip69c84 |    .5135577    .0673894      7.62    0.000       .381477     .6456385
     ip69c85 |    .5032431    .0675051      7.45    0.000      .3709356     .6355506
     ip69c86 |    .3936913     .068586      5.74    0.000      .2592652     .5281174
     ip69c87 |    .4069325    .0684056      5.95    0.000        .27286      .541005
     ip69c88 |    .2191103    .0704256      3.11    0.002      .0810787     .3571419
     ip69c89 |    .2389231    .0700736      3.41    0.001      .1015814     .3762647
     ip69c90 |    .2371948    .0699416      3.39    0.001      .1001117     .3742778
     ip69c91 |    .1665798    .0706217      2.36    0.018      .0281638     .3049957
     ip69c92 |    .1779216    .0702542      2.53    0.011      .0402259     .3156172
     ip69c93 |     .112973    .0708418      1.59    0.111     -.0258744     .2518204
     ip69c94 |    .0355621    .0716317      0.50    0.620     -.1048334     .1759576
     ip69c95 |    .0290536    .0714234      0.41    0.684     -.1109337     .1690409
     ip69c96 |    .0233986    .0713336      0.33    0.743     -.1164126     .1632098
     ip69c97 |   -.0417663    .0718778     -0.58    0.561     -.1826443     .0991117
     ip69c98 |   -.0554599    .0717627     -0.77    0.440     -.1961122     .0851923
     ip69c99 |    .0470784    .0698899      0.67    0.501     -.0899033     .1840601
     ip70c80 |    .6992836    .0593558     11.78    0.000      .5829484     .8156187
     ip70c81 |    .6199805    .0599348     10.34    0.000      .5025104     .7374506
     ip70c82 |    .5393324    .0605908      8.90    0.000      .4205766     .6580882
     ip70c83 |     .580857    .0602681      9.64    0.000      .4627337     .6989802
     ip70c84 |    .5140428    .0608347      8.45    0.000       .394809     .6332767
     ip70c85 |     .570877    .0603719      9.46    0.000      .4525502     .6892039
     ip70c86 |    .4542815    .0613372      7.41    0.000      .3340627     .5745003
     ip70c87 |     .500019    .0608959      8.21    0.000      .3806651     .6193728
     ip70c88 |    .3942688    .0617504      6.38    0.000      .2732402     .5152974
     ip70c89 |    .3402553    .0621386      5.48    0.000      .2184659     .4620447
     ip70c90 |    .3498557    .0618811      5.65    0.000       .228571     .4711405
     ip70c91 |    .2791316     .062369      4.48    0.000      .1568906     .4013726
     ip70c92 |    .2567917    .0623438      4.12    0.000      .1346001     .3789832
     ip70c93 |    .1856826     .062806      2.96    0.003      .0625851     .3087801
     ip70c94 |     .163383    .0627167      2.61    0.009      .0404605     .2863055
     ip70c95 |     .156594    .0624194      2.51    0.012      .0342541     .2789338
     ip70c96 |    .1821825    .0619905      2.94    0.003      .0606833     .3036817
     ip70c97 |    .1204296    .0620314      1.94    0.052     -.0011497     .2420089
     ip70c98 |    .0652821    .0622613      1.05    0.294     -.0567477      .187312
     ip70c99 |    .1076149      .06132      1.75    0.079       -.01257     .2277999
     ip71c80 |     .674124    .0574673     11.73    0.000      .5614902     .7867578
     ip71c81 |    .5667796    .0581001      9.76    0.000      .4529054     .6806538
     ip71c82 |    .5729702    .0579718      9.88    0.000      .4593476     .6865928
     ip71c83 |    .6069459    .0576772     10.52    0.000      .4939006     .7199912
     ip71c84 |    .4962188    .0584864      8.48    0.000      .3815875     .6108501
     ip71c85 |    .4803525    .0585931      8.20    0.000      .3655122     .5951928
     ip71c86 |    .5027398    .0583933      8.61    0.000       .388291     .6171886
     ip71c87 |    .4067081    .0591392      6.88    0.000      .2907974     .5226187
     ip71c88 |    .3783548    .0593246      6.38    0.000      .2620808     .4946288
     ip71c89 |     .294181     .059997      4.90    0.000       .176589      .411773
     ip71c90 |    .3206103    .0596372      5.38    0.000      .2037237      .437497
     ip71c91 |    .3133319    .0595532      5.26    0.000      .1966098     .4300539
     ip71c92 |    .1771602    .0606968      2.92    0.004      .0581967     .2961237
     ip71c93 |    .1922614     .060323      3.19    0.001      .0740304     .3104923
     ip71c94 |    .1037214    .0610162      1.70    0.089     -.0158683      .223311
     ip71c95 |    .1274944    .0604762      2.11    0.035      .0089633     .2460254
     ip71c96 |    .1205638    .0603445      2.00    0.046      .0022908     .2388367
     ip71c97 |    .1410352    .0596335      2.37    0.018      .0241557     .2579147
     ip71c98 |    .0479325    .0603657      0.79    0.427     -.0703821     .1662472
     ip71c99 |    .0367111    .0601865      0.61    0.542     -.0812523     .1546745
     ip72c80 |    .7019056    .0535498     13.11    0.000      .5969499     .8068613
     ip72c81 |    .5968864    .0539524     11.06    0.000      .4911416     .7026312
     ip72c82 |    .5942712    .0537769     11.05    0.000      .4888705     .6996719
     ip72c83 |    .6804254    .0530835     12.82    0.000      .5763836     .7844672
     ip72c84 |    .5886515    .0535803     10.99    0.000       .483636     .6936671
     ip72c85 |    .5355586    .0538744      9.94    0.000      .4299666     .6411505
     ip72c86 |    .4621484    .0543487      8.50    0.000      .3556269       .56867
     ip72c87 |    .4230979    .0545888      7.75    0.000      .3161057       .53009
     ip72c88 |    .3651776    .0549831      6.64    0.000      .2574127     .4729425
     ip72c89 |    .2937667    .0555005      5.29    0.000      .1849877     .4025457
     ip72c90 |    .2215827     .056041      3.95    0.000      .1117443     .3314211
     ip72c91 |    .1940135    .0561711      3.45    0.001      .0839202     .3041068
     ip72c92 |    .1927419      .05603      3.44    0.001       .082925     .3025587
     ip72c93 |    .1949629    .0558266      3.49    0.000      .0855447      .304381
     ip72c94 |    .0963412    .0565831      1.70    0.089     -.0145596      .207242
     ip72c95 |    .1457934    .0558486      2.61    0.009      .0363321     .2552547
     ip72c96 |    .1663037    .0555096      3.00    0.003      .0575068     .2751006
     ip72c97 |   -.0032014    .0568056     -0.06    0.955     -.1145382     .1081355
     ip72c98 |    .0462879    .0559533      0.83    0.408     -.0633786     .1559544
     ip72c99 |    .0196445     .056009      0.35    0.726     -.0901311     .1294201
     ip73c80 |    .5350199    .0508586     10.52    0.000      .4353389      .634701
     ip73c81 |    .4517534    .0508891      8.88    0.000      .3520126     .5514941
     ip73c82 |    .4854818    .0502822      9.66    0.000      .3869305      .584033
     ip73c83 |    .4763645    .0500486      9.52    0.000       .378271     .5744579
     ip73c84 |    .4422721    .0500555      8.84    0.000      .3441651      .540379
     ip73c85 |    .3831555    .0502992      7.62    0.000      .2845709       .48174
     ip73c86 |    .3109439    .0506989      6.13    0.000       .211576     .4103118
     ip73c87 |    .3277215    .0504686      6.49    0.000      .2288048     .4266382
     ip73c88 |    .2426188    .0510252      4.75    0.000      .1426114     .3426263
     ip73c89 |    .2081147    .0512046      4.06    0.000      .1077554     .3084739
     ip73c90 |    .1676876    .0514304      3.26    0.001       .066886     .2684893
     ip73c91 |    .1107207    .0517936      2.14    0.033      .0092071     .2122342
     ip73c92 |    .0490971    .0521995      0.94    0.347     -.0532121     .1514063
     ip73c93 |    .0275053    .0522234      0.53    0.598     -.0748507     .1298614
     ip73c94 |    .0099003    .0521843      0.19    0.850     -.0923791     .1121797
     ip73c95 |   -.0651113    .0526924     -1.24    0.217     -.1683865     .0381638
     ip73c96 |    .0293602    .0519301      0.57    0.572     -.0724209     .1311414
     ip73c97 |   -.0280246    .0518153     -0.54    0.589     -.1295808     .0735316
     ip73c98 |    .0185297     .051059      0.36    0.717     -.0815441     .1186035
     ip73c99 |    .0185933    .0508003      0.37    0.714     -.0809734       .11816
     ip74c80 |    .8161563    .0516868     15.79    0.000      .7148521     .9174606
     ip74c81 |    .7347407    .0513306     14.31    0.000      .6341346     .8353469
     ip74c82 |    .7767908    .0504924     15.38    0.000      .6778274     .8757541
     ip74c83 |     .745522    .0501675     14.86    0.000      .6471955     .8438486
     ip74c84 |    .7230995    .0499066     14.49    0.000      .6252844     .8209147
     ip74c85 |    .7107231     .049678     14.31    0.000      .6133559     .8080903
     ip74c86 |    .6434396    .0498316     12.91    0.000      .5457715     .7411078
     ip74c87 |    .5426544    .0502683     10.80    0.000      .4441303     .6411785
     ip74c88 |    .4875953    .0504777      9.66    0.000      .3886607     .5865299
     ip74c89 |    .4491629    .0506045      8.88    0.000        .34998     .5483458
     ip74c90 |    .4191583     .050684      8.27    0.000      .3198195      .518497
     ip74c91 |    .3729752    .0508827      7.33    0.000      .2732469     .4727035
     ip74c92 |     .328319      .05107      6.43    0.000      .2282236     .4284144
     ip74c93 |    .3057214    .0510768      5.99    0.000      .2056128     .4058301
     ip74c94 |    .1895432    .0518453      3.66    0.000      .0879282     .2911582
     ip74c95 |    .2167292    .0513975      4.22    0.000       .115992     .3174664
     ip74c96 |    .1996113    .0514457      3.88    0.000      .0987796     .3004429
     ip74c97 |    .2041112    .0508968      4.01    0.000      .1043554      .303867
     ip74c98 |    .1366892    .0512261      2.67    0.008      .0362879     .2370904
     ip74c99 |    .0891263     .051418      1.73    0.083     -.0116512     .1899038
     ip75c80 |    .9348155    .0544255     17.18    0.000      .8281435     1.041487
     ip75c81 |    .9463006    .0533787     17.73    0.000      .8416802     1.050921
     ip75c82 |    .9169651    .0527008     17.40    0.000      .8136735     1.020257
     ip75c83 |    .8820439    .0522078     16.89    0.000      .7797186     .9843693
     ip75c84 |    .8565554    .0518013     16.54    0.000      .7550266     .9580841
     ip75c85 |     .871414     .051294     16.99    0.000      .7708796     .9719484
     ip75c86 |    .7634571    .0515362     14.81    0.000      .6624481     .8644661
     ip75c87 |    .6791669    .0517603     13.12    0.000      .5777187     .7806151
     ip75c88 |    .6018652    .0520278     11.57    0.000      .4998926     .7038377
     ip75c89 |    .4635456    .0528047      8.78    0.000      .3600503     .5670408
     ip75c90 |    .5206426    .0522256      9.97    0.000      .4182823     .6230028
     ip75c91 |    .4434153    .0526319      8.42    0.000      .3402587      .546572
     ip75c92 |    .3486225    .0532203      6.55    0.000      .2443128     .4529323
     ip75c93 |    .3593365    .0529724      6.78    0.000      .2555124     .4631605
     ip75c94 |    .2791564    .0534729      5.22    0.000      .1743514     .3839613
     ip75c95 |    .2207306     .053808      4.10    0.000      .1152689     .3261923
     ip75c96 |    .2664618    .0531971      5.01    0.000      .1621975     .3707261
     ip75c97 |    .1602132    .0538132      2.98    0.003      .0547412     .2656852
     ip75c98 |    .0997989    .0541898      1.84    0.066     -.0064112     .2060089
     ip75c99 |    .0888231    .0540781      1.64    0.100     -.0171681     .1948143
     ip66c00 |    .0309697    .0790567      0.39    0.695     -.1239786     .1859181
     ip66c01 |   -.0616436    .0803625     -0.77    0.443     -.2191512     .0958639
     ip66c02 |    .0212693    .0782085      0.27    0.786     -.1320167     .1745552
     ip66c03 |    .1011007    .0763682      1.32    0.186     -.0485782     .2507797
     ip66c04 |    .1161307    .0758345      1.53    0.126     -.0325022     .2647635
     ip67c00 |    .1863009    .1049256      1.78    0.076     -.0193495     .3919513
     ip67c01 |    .3255885    .1013898      3.21    0.001      .1268681      .524309
     ip67c02 |    .2408809    .1026855      2.35    0.019      .0396209     .4421408
     ip67c03 |    .2235277    .1028227      2.17    0.030      .0219989     .4250566
     ip67c04 |     .200517    .1031822      1.94    0.052     -.0017164     .4027504
     ip68c00 |   -.0388525    .0659496     -0.59    0.556     -.1681113     .0904062
     ip68c01 |   -.0552287    .0657231     -0.84    0.401     -.1840435     .0735861
     ip68c02 |   -.0420747    .0646554     -0.65    0.515      -.168797     .0846476
     ip68c03 |   -.0489337    .0644561     -0.76    0.448     -.1752653     .0773978
     ip68c04 |    .0656745    .0624183      1.05    0.293     -.0566631     .1880122
     ip69c00 |   -.0096206    .0671999     -0.14    0.886       -.14133     .1220888
     ip69c01 |    .1010986    .0650467      1.55    0.120     -.0263907     .2285878
     ip69c02 |    .1131003    .0639694      1.77    0.077     -.0122775     .2384781
     ip69c03 |    .0393735    .0649033      0.61    0.544     -.0878346     .1665816
     ip69c04 |    .1099504    .0637223      1.73    0.084      -.014943     .2348439
     ip70c00 |    .0857002    .0574444      1.49    0.136     -.0268887     .1982891
     ip70c01 |    .1028085     .056505      1.82    0.069     -.0079392     .2135562
     ip70c02 |    .0567071    .0562743      1.01    0.314     -.0535884     .1670027
     ip70c03 |    .1007484    .0552806      1.82    0.068     -.0075996     .2090964
     ip70c04 |    .1131017     .054913      2.06    0.039      .0054742     .2207291
     ip71c00 |    .0122667    .0568603      0.22    0.829     -.0991774     .1237108
     ip71c01 |     .046214    .0557856      0.83    0.407     -.0631238     .1555518
     ip71c02 |    .0360373    .0548569      0.66    0.511     -.0714801     .1435548
     ip71c03 |    .0786373    .0540622      1.45    0.146     -.0273227     .1845973
     ip71c04 |    .0574301    .0542365      1.06    0.290     -.0488714     .1637317
     ip72c00 |    .0058636    .0522629      0.11    0.911     -.0965697     .1082969
     ip72c01 |     .004808    .0515938      0.09    0.926     -.0963141       .10593
     ip72c02 |    .0080278    .0505825      0.16    0.874     -.0911121     .1071677
     ip72c03 |    .1142596    .0490399      2.33    0.020      .0181432     .2103761
     ip72c04 |   -.0799865    .0513374     -1.56    0.119      -.180606      .020633
     ip73c00 |   -.0663978    .0468691     -1.42    0.157     -.1582595     .0254639
     ip73c01 |   -.0314044    .0459487     -0.68    0.494     -.1214622     .0586535
     ip73c02 |    .0261089    .0443746      0.59    0.556     -.0608637     .1130815
     ip73c03 |    .1261123    .0430992      2.93    0.003      .0416394     .2105853
     ip73c04 |    .1128274    .0430828      2.62    0.009      .0283866     .1972682
     ip74c00 |    .0443459    .0477015      0.93    0.353     -.0491473     .1378391
     ip74c01 |    .1257914    .0460997      2.73    0.006      .0354378     .2161451
     ip74c02 |   -.0349293    .0467963     -0.75    0.455     -.1266482     .0567897
     ip74c03 |    .1517802    .0444652      3.41    0.001      .0646301     .2389303
     ip74c04 |     .141124    .0444429      3.18    0.001      .0540176     .2282305
     ip75c00 |    .0850431    .0506125      1.68    0.093     -.0141556     .1842418
     ip75c01 |     .061802    .0501987      1.23    0.218     -.0365856     .1601895
     ip75c02 |    .0621051    .0488728      1.27    0.204     -.0336838     .1578941
     ip75c03 |    .1249347    .0479856      2.60    0.009      .0308847     .2189847
     ip75c04 |    .0220655    .0490977      0.45    0.653     -.0741642     .1182952
 ia1journal2 |    .0039248    .0065612      0.60    0.550     -.0089349     .0167844
 ia1journal3 |    .0193696    .0082798      2.34    0.019      .0031415     .0355977
 ia1journal4 |   -.0628236    .0078572     -8.00    0.000     -.0782235    -.0474238
 ia1journal5 |    .0115436    .0056508      2.04    0.041      .0004681     .0226191
 ia1journal6 |    .0399049    .0267133      1.49    0.135     -.0124521      .092262
 ia1journal7 |    .0396483    .0157373      2.52    0.012      .0088038     .0704928
 ia1journal8 |   -.0325087    .0118386     -2.75    0.006     -.0557119    -.0093055
 ia1journal9 |    .0223935    .0078383      2.86    0.004      .0070306     .0377563
ia1journal10 |    .0183018    .0147521      1.24    0.215     -.0106118     .0472154
ia1journal11 |   -.0340043    .0090043     -3.78    0.000     -.0516525    -.0163561
ia1journal12 |   -.0374124    .0163048     -2.29    0.022     -.0693692    -.0054555
ia1journal13 |    .0119927    .0114433      1.05    0.295     -.0104357     .0344211
ia1journal14 |    .0980014    .0242618      4.04    0.000      .0504492     .1455537
ia1journal15 |    .0114693    .0143581      0.80    0.424      -.016672     .0396107
ia1journal16 |   -.0887976    .0391809     -2.27    0.023     -.1655908    -.0120044
ia1journal17 |    .0198984    .0096254      2.07    0.039       .001033     .0387639
ia1journal18 |   -.1022455    .0190232     -5.37    0.000     -.1395302    -.0649607
ia1journal19 |    .0739755    .0118291      6.25    0.000      .0507909     .0971601
ia1journal20 |    .0251852    .0072359      3.48    0.001      .0110031     .0393673
ia1journal21 |    .0167554    .0234217      0.72    0.474     -.0291503      .062661
ia1journal22 |   -.0370192    .0306299     -1.21    0.227     -.0970526     .0230143
ia1journal23 |   -.0429902    .0184173     -2.33    0.020     -.0790875    -.0068929
ia1journal24 |    .0405869    .0070471      5.76    0.000      .0267749      .054399
ia1journal25 |   -.0120424    .0164153     -0.73    0.463     -.0442158      .020131
ia1journal26 |   -.0043314    .0144561     -0.30    0.764     -.0326649      .024002
ia1journal27 |   -.0550958    .0180671     -3.05    0.002     -.0905067    -.0196849
ia1journal28 |    .0223401    .0224851      0.99    0.320     -.0217298     .0664101
ia1journal29 |    .1159788    .0635106      1.83    0.068     -.0084996     .2404572
ia1journal30 |    .1368262    .0247139      5.54    0.000      .0883879     .1852645
ia1journal31 |   -.0630547    .0869038     -0.73    0.468     -.2333831     .1072736
ia1journal32 |    .0040541    .0242338      0.17    0.867     -.0434432     .0515514
ia1journal33 |    .0037419    .0305626      0.12    0.903     -.0561597     .0636436
ia1journal34 |    .0949853    .0267656      3.55    0.000      .0425257     .1474449
ia1journal35 |    .0190613    .0301143      0.63    0.527     -.0399616     .0780842
ia1journal36 |   -.4668777    .0834381     -5.60    0.000     -.6304134    -.3033419
ia1journal37 |    .0066861    .0105838      0.63    0.528     -.0140577     .0274299
ia1journal38 |    -.004156    .0254948     -0.16    0.871      -.054125     .0458129
ia1journal39 |    .0197997    .0165592      1.20    0.232     -.0126557     .0522551
ia1journal40 |    .0001437    .0365594      0.00    0.997     -.0715115     .0717988
ia1journal41 |    .0356228    .0079943      4.46    0.000      .0199542     .0512913
ia1journal42 |    .0268471    .0333681      0.80    0.421     -.0385531     .0922473
ia1journal43 |    .0190043    .0218435      0.87    0.384     -.0238082     .0618168
ia1journal44 |    .0990837    .0104724      9.46    0.000      .0785583     .1196092
ia1journal45 |    .1243192    .0308245      4.03    0.000      .0639044      .184734
ia1journal46 |    .0258403    .0109153      2.37    0.018      .0044466     .0472339
ia1journal47 |    .0037519    .0079972      0.47    0.639     -.0119223     .0194262
ia1journal48 |    .0270647    .0258349      1.05    0.295     -.0235708     .0777003
ia1journal49 |   -.0530346    .0276805     -1.92    0.055     -.1072873     .0012181
ia1journal50 |   -.0833407    .0196439     -4.24    0.000     -.1218421    -.0448393
ia1journal51 |   -.0684992     .138107     -0.50    0.620      -.339184     .2021856
ia1journal52 |    .1162902    .0636162      1.83    0.068     -.0083953     .2409758
ia1journal53 |    -.036781    .0461603     -0.80    0.426     -.1272535     .0536916
ia1journal54 |   -.0062284    .0639554     -0.10    0.922     -.1315788      .119122
ia1journal55 |   -.0097015     .022914     -0.42    0.672     -.0546121     .0352091
ia1journal56 |   -.0780857    .0511908     -1.53    0.127     -.1784178     .0222464
ia1journal57 |    -.004613    .0115105     -0.40    0.689     -.0271732     .0179472
ia1journal58 |    .0012466    .0352756      0.04    0.972     -.0678923     .0703854
ia1journal59 |    .0707465    .0236106      3.00    0.003      .0244706     .1170224
 ia2journal2 |   -.0001142    .0001553     -0.74    0.462     -.0004187     .0001902
 ia2journal3 |    .0000149    .0001854      0.08    0.936     -.0003485     .0003782
 ia2journal4 |    .0010967    .0001871      5.86    0.000      .0007299     .0014635
 ia2journal5 |     .000103    .0001346      0.77    0.444     -.0001608     .0003668
 ia2journal6 |   -.0014843    .0006656     -2.23    0.026     -.0027889    -.0001797
 ia2journal7 |   -.0009897    .0003778     -2.62    0.009     -.0017303    -.0002492
 ia2journal8 |    .0006676    .0002865      2.33    0.020       .000106     .0012291
 ia2journal9 |   -.0004664    .0001869     -2.50    0.013     -.0008327    -.0001002
ia2journal10 |   -.0009491    .0003877     -2.45    0.014      -.001709    -.0001893
ia2journal11 |    .0008261    .0002137      3.87    0.000      .0004074     .0012449
ia2journal12 |     .000321    .0004114      0.78    0.435     -.0004852     .0011273
ia2journal13 |   -.0002494    .0002601     -0.96    0.338     -.0007591     .0002604
ia2journal14 |   -.0029575    .0006203     -4.77    0.000     -.0041733    -.0017417
ia2journal15 |   -.0004855    .0003445     -1.41    0.159     -.0011607     .0001896
ia2journal16 |   -.0000846    .0011252     -0.08    0.940       -.00229     .0021208
ia2journal17 |   -.0002304    .0002423     -0.95    0.342     -.0007052     .0002445
ia2journal18 |    .0015753    .0004696      3.35    0.001      .0006549     .0024957
ia2journal19 |   -.0019814    .0003083     -6.43    0.000     -.0025856    -.0013772
ia2journal20 |   -.0006886     .000174     -3.96    0.000     -.0010296    -.0003476
ia2journal21 |   -.0005181     .000573     -0.90    0.366     -.0016411     .0006049
ia2journal22 |    -.000488    .0007803     -0.63    0.532     -.0020173     .0010414
ia2journal23 |    .0011359    .0004115      2.76    0.006      .0003294     .0019424
ia2journal24 |    -.000646    .0001692     -3.82    0.000     -.0009777    -.0003143
ia2journal25 |    .0004331    .0004613      0.94    0.348     -.0004711     .0013373
ia2journal26 |   -.0000486    .0003573     -0.14    0.892     -.0007489     .0006518
ia2journal27 |    .0004472    .0004525      0.99    0.323     -.0004397      .001334
ia2journal28 |   -.0012118    .0005562     -2.18    0.029     -.0023019    -.0001218
ia2journal29 |   -.0024677    .0015288     -1.61    0.106     -.0054641     .0005286
ia2journal30 |   -.0032805    .0006252     -5.25    0.000     -.0045059     -.002055
ia2journal31 |    .0015523    .0018731      0.83    0.407      -.002119     .0052236
ia2journal32 |   -.0007381    .0007113     -1.04    0.299     -.0021322     .0006561
ia2journal33 |   -.0004519    .0008095     -0.56    0.577     -.0020385     .0011348
ia2journal34 |   -.0026227    .0006637     -3.95    0.000     -.0039236    -.0013219
ia2journal35 |   -.0008353    .0007606     -1.10    0.272     -.0023261     .0006555
ia2journal36 |    .0084628     .002695      3.14    0.002      .0031806     .0137449
ia2journal37 |   -.0000327    .0002508     -0.13    0.896     -.0005243     .0004589
ia2journal38 |   -.0002129    .0006153     -0.35    0.729     -.0014188      .000993
ia2journal39 |   -.0009113    .0004029     -2.26    0.024      -.001701    -.0001217
ia2journal40 |   -.0000376     .000901     -0.04    0.967     -.0018035     .0017283
ia2journal41 |   -.0004098    .0001935     -2.12    0.034     -.0007891    -.0000304
ia2journal42 |   -.0006991    .0009342     -0.75    0.454       -.00253     .0011319
ia2journal43 |   -.0012904    .0005919     -2.18    0.029     -.0024505    -.0001304
ia2journal44 |   -.0016476    .0002489     -6.62    0.000     -.0021354    -.0011598
ia2journal45 |   -.0027132    .0007795     -3.48    0.001     -.0042411    -.0011854
ia2journal46 |   -.0005381    .0002607     -2.06    0.039      -.001049    -.0000272
ia2journal47 |   -.0004762    .0001952     -2.44    0.015     -.0008588    -.0000936
ia2journal48 |   -.0006654    .0006387     -1.04    0.298     -.0019173     .0005865
ia2journal49 |     .000555    .0008075      0.69    0.492     -.0010276     .0021377
ia2journal50 |    .0010027     .000482      2.08    0.037      .0000581     .0019473
ia2journal51 |   -.0065521    .0048554     -1.35    0.177     -.0160685     .0029644
ia2journal52 |   -.0029611    .0017845     -1.66    0.097     -.0064586     .0005364
ia2journal53 |    -.000091    .0012056     -0.08    0.940      -.002454     .0022719
ia2journal54 |   -.0024542    .0021398     -1.15    0.251     -.0066482     .0017398
ia2journal55 |   -.0002654    .0005457     -0.49    0.627     -.0013348     .0008041
ia2journal56 |    .0020659    .0012533      1.65    0.099     -.0003906     .0045223
ia2journal57 |   -.0007308    .0002933     -2.49    0.013     -.0013058    -.0001559
ia2journal58 |   -.0000534     .000818     -0.07    0.948     -.0016567       .00155
ia2journal59 |   -.0015819    .0005934     -2.67    0.008     -.0027449    -.0004189
       d1c95 |    .0280767     .021183      1.33    0.185     -.0134412     .0695945
       d1c00 |    .0127399    .0270274      0.47    0.637     -.0402328     .0657127
       d2c95 |   -.0101619    .0168768     -0.60    0.547     -.0432399      .022916
       d2c00 |    .0248876    .0221246      1.12    0.261     -.0184758     .0682509
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     ip66c80 |    1.694902     .198188      4.51    0.000      1.347759      2.13146
     ip66c81 |    1.555443    .2052539      3.35    0.001      1.200966     2.014547
     ip66c82 |     1.56053    .1773649      3.92    0.000      1.248899     1.949921
     ip66c83 |      1.4698    .1719837      3.29    0.001      1.168578     1.848667
     ip66c84 |    1.385533    .2233213      2.02    0.043      1.010228     1.900265
     ip66c85 |    1.432373    .1783402      2.89    0.004      1.122214     1.828254
     ip66c86 |    1.298879    .1558976      2.18    0.029      1.026605     1.643365
     ip66c87 |    1.426956    .2372679      2.14    0.032      1.030094     1.976718
     ip66c88 |    1.218738    .1457877      1.65    0.098      .9640247     1.540752
     ip66c89 |    1.086081    .1500733      0.60    0.550      .8284079     1.423902
     ip66c90 |    1.190781    .1965778      1.06    0.290      .8616145     1.645701
     ip66c91 |     1.03596     .134638      0.27    0.786      .8030029       1.3365
     ip66c92 |    .9948316    .1099295     -0.05    0.963      .8011083     1.235401
     ip66c93 |    1.005396      .13465      0.04    0.968      .7732826     1.307183
     ip66c94 |    .9644147    .0853333     -0.41    0.682      .8108637     1.147043
     ip66c95 |    .8690483    .0979149     -1.25    0.213      .6968508     1.083797
     ip66c96 |    .9569956    .0938279     -0.45    0.654      .7896862     1.159753
     ip66c97 |     .941293    .1115424     -0.51    0.610       .746205     1.187385
     ip66c98 |     .902758    .0893924     -1.03    0.302      .7435055     1.096121
     ip66c99 |    .9874772    .1112392     -0.11    0.911      .7918435     1.231444
     ip67c80 |    2.806161    .4079353      7.10    0.000      2.110437     3.731237
     ip67c81 |    2.738499    .3807049      7.25    0.000       2.08535      3.59622
     ip67c82 |    2.572773    .3490571      6.97    0.000      1.972041     3.356502
     ip67c83 |    2.497652    .3528669      6.48    0.000       1.89354     3.294498
     ip67c84 |    2.599943    .2865637      8.67    0.000      2.094812     3.226878
     ip67c85 |    2.501267    .3718242      6.17    0.000      1.869069     3.347302
     ip67c86 |    2.079633    .2938024      5.18    0.000      1.576639     2.743096
     ip67c87 |    2.054735     .254469      5.81    0.000      1.611902     2.619227
     ip67c88 |    1.908426    .2189389      5.63    0.000      1.524135      2.38961
     ip67c89 |    1.755885    .2173314      4.55    0.000      1.377654     2.237958
     ip67c90 |    1.719009    .1937098      4.81    0.000      1.378348     2.143865
     ip67c91 |       1.589    .1630244      4.51    0.000      1.299554     1.942913
     ip67c92 |    1.458531    .1940419      2.84    0.005      1.123757     1.893036
     ip67c93 |    1.643354    .1968813      4.15    0.000      1.299431     2.078303
     ip67c94 |    1.418784    .1612958      3.08    0.002      1.135394     1.772906
     ip67c95 |    1.357705    .1291008      3.22    0.001      1.126852     1.635853
     ip67c96 |    1.479583    .1033298      5.61    0.000       1.29031     1.696621
     ip67c97 |    1.494808    .1129634      5.32    0.000      1.289021      1.73345
     ip67c98 |    1.383857    .1287957      3.49    0.000      1.153107     1.660782
     ip67c99 |    1.494955    .1373302      4.38    0.000      1.248633      1.78987
     ip68c80 |    1.533832     .127975      5.13    0.000      1.302441     1.806333
     ip68c81 |    1.375674     .131856      3.33    0.001      1.140065     1.659976
     ip68c82 |     1.26246    .1035148      2.84    0.004      1.075038     1.482557
     ip68c83 |    1.387561    .1438646      3.16    0.002      1.132396     1.700224
     ip68c84 |    1.220318    .1235085      1.97    0.049      1.000744      1.48807
     ip68c85 |    1.293193    .1152687      2.88    0.004      1.085904     1.540051
     ip68c86 |     1.14338    .0973081      1.57    0.115      .9677177      1.35093
     ip68c87 |    1.203067    .1077939      2.06    0.039      1.009306     1.434026
     ip68c88 |    1.102791    .0975638      1.11    0.269      .9272296     1.311592
     ip68c89 |    .9688831    .0777878     -0.39    0.694      .8278121     1.133995
     ip68c90 |    .9966623    .0927654     -0.04    0.971      .8304655     1.196119
     ip68c91 |    .9206408    .0628086     -1.21    0.226      .8054135     1.052353
     ip68c92 |     .893518    .0974063     -1.03    0.302      .7216226      1.10636
     ip68c93 |    1.045729    .0824112      0.57    0.570      .8960625     1.220394
     ip68c94 |    .9364488    .0840931     -0.73    0.465      .7853191     1.116663
     ip68c95 |    .8738008    .0877013     -1.34    0.179      .7177602     1.063765
     ip68c96 |    1.040202    .0756128      0.54    0.588      .9020764     1.199477
     ip68c97 |    .9926737    .0862186     -0.08    0.933      .8372891     1.176895
     ip68c98 |     .927398    .0680992     -1.03    0.305      .8030861     1.070952
     ip68c99 |     .929197    .0919339     -0.74    0.458      .7654039     1.128041
     ip69c80 |    2.031982    .3186202      4.52    0.000       1.49434     2.763062
     ip69c81 |    1.689513    .2436139      3.64    0.000      1.273577     2.241289
     ip69c82 |     1.79359    .2339985      4.48    0.000      1.388904      2.31619
     ip69c83 |    1.816385    .2590973      4.18    0.000      1.373373     2.402299
     ip69c84 |    1.671226    .2262155      3.79    0.000      1.281792     2.178979
     ip69c85 |    1.654077    .2137376      3.89    0.000      1.283999      2.13082
     ip69c86 |    1.482443     .190186      3.07    0.002      1.152857     1.906253
     ip69c87 |    1.502203    .1999802      3.06    0.002      1.157211     1.950044
     ip69c88 |    1.244969    .1677131      1.63    0.104      .9560722     1.621161
     ip69c89 |    1.269881    .1647541      1.84    0.066      .9847551     1.637562
     ip69c90 |    1.267688    .1207886      2.49    0.013      1.051738     1.527978
     ip69c91 |    1.181258    .1180197      1.67    0.095      .9711828     1.436774
     ip69c92 |    1.194732    .1312824      1.62    0.105      .9632445      1.48185
     ip69c93 |    1.119602    .1202604      1.05    0.293      .9070537     1.381956
     ip69c94 |    1.036202    .1084645      0.34    0.734      .8440046     1.272167
     ip69c95 |     1.02948     .112066      0.27    0.790      .8316846     1.274316
     ip69c96 |    1.023675    .0730037      0.33    0.743      .8901396     1.177242
     ip69c97 |    .9590939     .103905     -0.39    0.700      .7756125      1.18598
     ip69c98 |    .9460499    .0957829     -0.55    0.584       .775772     1.153703
     ip69c99 |    1.048204    .1124199      0.44    0.661      .8494826     1.293413
     ip70c80 |     2.01231    .1765241      7.97    0.000      1.694438     2.389814
     ip70c81 |    1.858892    .1537716      7.49    0.000      1.580669     2.186087
     ip70c82 |    1.714862    .1372357      6.74    0.000      1.465918     2.006081
     ip70c83 |     1.78757     .138008      7.52    0.000       1.53655     2.079598
     ip70c84 |    1.672037     .117498      7.32    0.000      1.456901     1.918942
     ip70c85 |    1.769819    .1229454      8.22    0.000      1.544535     2.027962
     ip70c86 |    1.575041    .1071874      6.68    0.000      1.378366      1.79978
     ip70c87 |    1.648753    .1335936      6.17    0.000      1.406647     1.932528
     ip70c88 |    1.483299    .1014792      5.76    0.000      1.297162     1.696146
     ip70c89 |    1.405306    .1075935      4.44    0.000      1.209487      1.63283
     ip70c90 |    1.418863    .0769565      6.45    0.000      1.275771     1.578004
     ip70c91 |    1.321981    .0605392      6.10    0.000      1.208496     1.446124
     ip70c92 |    1.292776    .1156369      2.87    0.004      1.084887     1.540501
     ip70c93 |     1.20404    .0675883      3.31    0.001      1.078597     1.344073
     ip70c94 |    1.177488    .0726906      2.65    0.008      1.043298     1.328936
     ip70c95 |    1.169521    .0801924      2.28    0.022       1.02245     1.337746
     ip70c96 |    1.199833    .0740526      2.95    0.003      1.063128     1.354117
     ip70c97 |    1.127981    .0726317      1.87    0.061      .9942425      1.27971
     ip70c98 |     1.06746    .0844075      0.83    0.409      .9142068     1.246404
     ip70c99 |    1.113619    .0518873      2.31    0.021      1.016427     1.220104
     ip71c80 |    1.962313    .2694001      4.91    0.000      1.499372     2.568191
     ip71c81 |    1.762582    .2302703      4.34    0.000      1.364411      2.27695
     ip71c82 |    1.773527    .2236859      4.54    0.000      1.385097     2.270887
     ip71c83 |    1.834819    .2390541      4.66    0.000      1.421321     2.368614
     ip71c84 |    1.642499     .170068      4.79    0.000      1.340818     2.012057
     ip71c85 |    1.616644     .184512      4.21    0.000      1.292601     2.021922
     ip71c86 |    1.653245    .2096871      3.96    0.000      1.289366     2.119816
     ip71c87 |    1.501866     .184129      3.32    0.001      1.181064     1.909803
     ip71c88 |    1.459881    .1672213      3.30    0.001      1.166318     1.827334
     ip71c89 |    1.342027    .1427271      2.77    0.006      1.089518     1.653058
     ip71c90 |    1.377969    .1743153      2.53    0.011      1.075377     1.765703
     ip71c91 |    1.367975    .1522781      2.81    0.005       1.09983     1.701496
     ip71c92 |    1.193822    .1473872      1.43    0.151      .9372423     1.520644
     ip71c93 |    1.211987    .1225196      1.90    0.057      .9941461     1.477563
     ip71c94 |    1.109291    .1142622      1.01    0.314      .9065002     1.357448
     ip71c95 |    1.135978    .1292741      1.12    0.263      .9088736     1.419831
     ip71c96 |    1.128133    .1248745      1.09    0.276      .9081124      1.40146
     ip71c97 |    1.151465    .1067973      1.52    0.128      .9600696     1.381017
     ip71c98 |      1.0491    .0782827      0.64    0.521      .9063608     1.214318
     ip71c99 |    1.037393    .0882654      0.43    0.666      .8780513     1.225651
     ip72c80 |    2.017594    .1881316      7.53    0.000      1.680595     2.422169
     ip72c81 |    1.816454    .1567221      6.92    0.000      1.533852     2.151124
     ip72c82 |     1.81171    .1572662      6.85    0.000      1.528269      2.14772
     ip72c83 |    1.974718    .1624379      8.27    0.000      1.680684     2.320191
     ip72c84 |    1.801557     .136369      7.78    0.000      1.553161      2.08968
     ip72c85 |    1.708402    .1551031      5.90    0.000      1.429917     2.041124
     ip72c86 |    1.587481    .1312497      5.59    0.000      1.349997     1.866741
     ip72c87 |    1.526684    .0967717      6.67    0.000      1.348323     1.728638
     ip72c88 |     1.44077    .1200823      4.38    0.000      1.223631     1.696441
     ip72c89 |    1.341471    .1088652      3.62    0.000      1.144203     1.572749
     ip72c90 |     1.24805    .0960611      2.88    0.004      1.073287      1.45127
     ip72c91 |    1.214113    .0788363      2.99    0.003      1.069025     1.378892
     ip72c92 |     1.21257    .0567103      4.12    0.000      1.106362     1.328973
     ip72c93 |    1.215266    .0726173      3.26    0.001      1.080957     1.366263
     ip72c94 |    1.101135    .0562761      1.89    0.059      .9961799     1.217147
     ip72c95 |    1.156957    .0572517      2.95    0.003      1.050016      1.27479
     ip72c96 |    1.180932    .0567764      3.46    0.001      1.074734     1.297623
     ip72c97 |    .9968038     .056314     -0.06    0.955      .8923217      1.11352
     ip72c98 |    1.047376    .0447255      1.08    0.278      .9632836     1.138809
     ip72c99 |    1.019839    .0520011      0.39    0.700      .9228457     1.127026
     ip73c80 |    1.707482     .280638      3.26    0.001      1.237242     2.356448
     ip73c81 |    1.571064    .2537865      2.80    0.005      1.144703     2.156231
     ip73c82 |    1.624958    .2455681      3.21    0.001      1.208387     2.185134
     ip73c83 |     1.61021    .2447218      3.13    0.002      1.195407     2.168948
     ip73c84 |    1.556239    .2354489      2.92    0.003      1.156898     2.093426
     ip73c85 |    1.466906    .2372108      2.37    0.018      1.068454      2.01395
     ip73c86 |    1.364713    .2130355      1.99    0.046         1.005     1.853174
     ip73c87 |    1.387802    .1813881      2.51    0.012      1.074173     1.793003
     ip73c88 |    1.274583    .1918817      1.61    0.107      .9489081     1.712032
     ip73c89 |    1.231354    .1706327      1.50    0.133      .9384893     1.615611
     ip73c90 |    1.182567    .1497501      1.32    0.185      .9226501     1.515705
     ip73c91 |    1.117083    .1510861      0.82    0.413      .8569586     1.456166
     ip73c92 |    1.050322    .1111915      0.46    0.643      .8535145     1.292511
     ip73c93 |    1.027887    .1155817      0.24    0.807      .8245771     1.281326
     ip73c94 |    1.009949    .1235869      0.08    0.936      .7945818     1.283691
     ip73c95 |    .9369631    .1258389     -0.48    0.628       .720115     1.219111
     ip73c96 |    1.029795    .0890336      0.34    0.734      .8692769     1.219955
     ip73c97 |    .9723644    .0797557     -0.34    0.733       .827964     1.141949
     ip73c98 |    1.018702     .085112      0.22    0.824      .8648285     1.199954
     ip73c99 |    1.018767    .0872488      0.22    0.828      .8613442     1.204962
     ip74c80 |     2.26179    .1632636     11.31    0.000      1.963404     2.605522
     ip74c81 |    2.084941    .1478502     10.36    0.000      1.814397     2.395827
     ip74c82 |    2.174483    .1596831     10.58    0.000       1.88299     2.511099
     ip74c83 |    2.107541    .1494098     10.52    0.000      1.834138       2.4217
     ip74c84 |    2.060811    .1395114     10.68    0.000      1.804737     2.353218
     ip74c85 |    2.035463     .138483     10.45    0.000      1.781359     2.325813
     ip74c86 |    1.903015    .1326659      9.23    0.000      1.659977     2.181637
     ip74c87 |    1.720568    .1043948      8.94    0.000      1.527656     1.937841
     ip74c88 |    1.628396    .1190198      6.67    0.000       1.41106     1.879206
     ip74c89 |       1.567    .1053617      6.68    0.000      1.373523      1.78773
     ip74c90 |    1.520681    .0982801      6.49    0.000      1.339756     1.726038
     ip74c91 |    1.452048    .0991086      5.46    0.000      1.270231      1.65989
     ip74c92 |    1.388632    .1052551      4.33    0.000      1.196928      1.61104
     ip74c93 |    1.357604    .1031734      4.02    0.000      1.169727     1.575657
     ip74c94 |    1.208697    .0760008      3.01    0.003      1.068552     1.367224
     ip74c95 |    1.242008    .0866009      3.11    0.002       1.08336     1.423887
     ip74c96 |    1.220928    .0692855      3.52    0.000      1.092411     1.364565
     ip74c97 |    1.226435    .0772133      3.24    0.001      1.084064     1.387503
     ip74c98 |    1.146472    .0769231      2.04    0.042      1.005198     1.307601
     ip74c99 |    1.093219     .061299      1.59    0.112      .9794413     1.220213
     ip75c80 |    2.546743    .2096559     11.36    0.000      2.167263      2.99267
     ip75c81 |    2.576162    .2138567     11.40    0.000      2.189333     3.031339
     ip75c82 |    2.501687     .240524      9.54    0.000      2.072022     3.020448
     ip75c83 |    2.415832    .2342602      9.10    0.000      1.997684     2.921506
     ip75c84 |    2.355034    .2273431      8.87    0.000      1.949066     2.845561
     ip75c85 |    2.390288    .1895142     10.99    0.000      2.046269     2.792144
     ip75c86 |    2.145681    .1833974      8.93    0.000      1.814724     2.536996
     ip75c87 |    1.972234    .1694815      7.90    0.000      1.666524     2.334024
     ip75c88 |    1.825521    .1593488      6.90    0.000      1.538458     2.166146
     ip75c89 |      1.5897    .1066574      6.91    0.000      1.393817     1.813112
     ip75c90 |    1.683109    .1222562      7.17    0.000      1.459766     1.940622
     ip75c91 |    1.558019     .113584      6.08    0.000      1.350572      1.79733
     ip75c92 |    1.417114    .0966368      5.11    0.000      1.239822     1.619759
     ip75c93 |    1.432379    .1060063      4.86    0.000      1.238976     1.655972
     ip75c94 |    1.322014    .0682338      5.41    0.000       1.19482     1.462748
     ip75c95 |    1.246987    .0625678      4.40    0.000      1.130194     1.375851
     ip75c96 |    1.305338    .0877388      3.96    0.000      1.144219     1.489144
     ip75c97 |    1.173761    .0555542      3.39    0.001      1.069775     1.287856
     ip75c98 |    1.104949     .058978      1.87    0.062       .995195     1.226806
     ip75c99 |    1.092887     .067543      1.44    0.151      .9682091     1.233621
     ip66c00 |    1.031454    .0670163      0.48    0.634      .9081241     1.171534
     ip66c01 |    .9402179     .065512     -0.88    0.376      .8201985       1.0778
     ip66c02 |    1.021497     .074058      0.29    0.769      .8861871     1.177467
     ip66c03 |    1.106388    .0567673      1.97    0.049      1.000538     1.223437
     ip66c04 |    1.123143     .103274      1.26    0.207      .9379208     1.344942
     ip67c00 |    1.204785    .1102864      2.04    0.042      1.006909     1.441547
     ip67c01 |    1.384845    .0928081      4.86    0.000      1.214385     1.579233
     ip67c02 |    1.272369    .1374637      2.23    0.026       1.02956     1.572443
     ip67c03 |     1.25048     .090059      3.10    0.002       1.08586     1.440058
     ip67c04 |    1.222034    .0952189      2.57    0.010      1.048961     1.423664
     ip68c00 |    .9618925    .0679888     -0.55    0.583      .8374553      1.10482
     ip68c01 |    .9462687    .0797819     -0.66    0.512      .8021358       1.1163
     ip68c02 |    .9587982     .054485     -0.74    0.459      .8577417     1.071761
     ip68c03 |    .9522442    .0859776     -0.54    0.588      .7977997     1.136587
     ip68c04 |    1.067879    .0876157      0.80    0.423      .9092515     1.254181
     ip69c00 |    .9904255    .0689879     -0.14    0.890      .8640354     1.135304
     ip69c01 |    1.106386    .0636325      1.76    0.079      .9884409     1.238404
     ip69c02 |    1.119744    .0612535      2.07    0.039      1.005902     1.246471
     ip69c03 |    1.040159    .0557236      0.73    0.462       .936481     1.155315
     ip69c04 |    1.116223    .0696807      1.76    0.078      .9876753     1.261501
     ip70c00 |     1.08948    .0434553      2.15    0.032      1.007553     1.178068
     ip70c01 |    1.108279    .0751081      1.52    0.129      .9704277     1.265713
     ip70c02 |    1.058346    .0548007      1.10    0.273      .9562088     1.171392
     ip70c03 |    1.105998    .0379445      2.94    0.003      1.034074     1.182926
     ip70c04 |    1.119746    .0503335      2.52    0.012      1.025315     1.222874
     ip71c00 |    1.012342    .0762814      0.16    0.871      .8733496     1.173455
     ip71c01 |    1.047298    .0812062      0.60    0.551      .8996413     1.219191
     ip71c02 |    1.036695    .0523378      0.71    0.475       .939026     1.144522
     ip71c03 |    1.081812    .0666943      1.28    0.202      .9586824     1.220756
     ip71c04 |    1.059111    .0564802      1.08    0.282      .9540009     1.175802
     ip72c00 |    1.005881    .0419642      0.14    0.888      .9269053     1.091585
     ip72c01 |     1.00482    .0468477      0.10    0.918        .91707     1.100965
     ip72c02 |     1.00806    .0442726      0.18    0.855      .9249172     1.098677
     ip72c03 |    1.121043    .0490594      2.61    0.009      1.028897     1.221442
     ip72c04 |    .9231288    .0522308     -1.41    0.157      .8262305     1.031391
     ip73c00 |    .9357585    .0615457     -1.01    0.313      .8225825     1.064506
     ip73c01 |    .9690836     .053355     -0.57    0.568      .8699545     1.079508
     ip73c02 |    1.026453    .0552889      0.48    0.628      .9236125     1.140744
     ip73c03 |     1.13441    .0478625      2.99    0.003      1.044375     1.232206
     ip73c04 |    1.119439    .0466542      2.71    0.007      1.031633     1.214718
     ip74c00 |    1.045344    .0637695      0.73    0.467      .9275408     1.178109
     ip74c01 |    1.134046     .043452      3.28    0.001      1.052001     1.222489
     ip74c02 |    .9656737    .0537293     -0.63    0.530       .865905     1.076938
     ip74c03 |    1.163904    .0600175      2.94    0.003      1.052021     1.287686
     ip74c04 |    1.151567    .0539331      3.01    0.003      1.050567     1.262278
     ip75c00 |    1.088764    .0598229      1.55    0.122      .9776061     1.212561
     ip75c01 |    1.063752    .0510525      1.29    0.198      .9682526      1.16867
     ip75c02 |    1.064074    .0561923      1.18    0.240      .9594473     1.180111
     ip75c03 |    1.133074     .054124      2.62    0.009      1.031808      1.24428
     ip75c04 |    1.022311    .0421441      0.54    0.592      .9429588      1.10834
 ia1journal2 |    1.003932     .003333      1.18    0.237      .9974211     1.010486
 ia1journal3 |    1.019558    .0042316      4.67    0.000      1.011298     1.027886
 ia1journal4 |    .9391091    .0023951    -24.63    0.000      .9344265     .9438151
 ia1journal5 |     1.01161    .0026899      4.34    0.000      1.006352     1.016896
 ia1journal6 |    1.040712     .002696     15.40    0.000      1.035441     1.046009
 ia1journal7 |    1.040445    .0027608     14.94    0.000      1.035048      1.04587
 ia1journal8 |     .968014    .0024285    -12.96    0.000      .9632659     .9727856
 ia1journal9 |    1.022646    .0029503      7.76    0.000       1.01688     1.028445
ia1journal10 |     1.01847    .0039017      4.78    0.000      1.010852     1.026146
ia1journal11 |    .9665673    .0029147    -11.28    0.000      .9608716     .9722969
ia1journal12 |    .9632788    .0025399    -14.19    0.000      .9583135     .9682699
ia1journal13 |    1.012065    .0045366      2.68    0.007      1.003212     1.020996
ia1journal14 |    1.102964    .0025929     41.69    0.000      1.097894     1.108058
ia1journal15 |    1.011535    .0033885      3.42    0.001      1.004916     1.018198
ia1journal16 |    .9150307    .0037251    -21.81    0.000      .9077587     .9223611
ia1journal17 |    1.020098    .0046418      4.37    0.000       1.01104     1.029236
ia1journal18 |    .9028079    .0018747    -49.24    0.000       .899141     .9064897
ia1journal19 |     1.07678    .0043898     18.15    0.000      1.068211     1.085419
ia1journal20 |    1.025505    .0030279      8.53    0.000      1.019588     1.031457
ia1journal21 |    1.016897    .0041434      4.11    0.000      1.008808      1.02505
ia1journal22 |    .9636577    .0026425    -13.50    0.000      .9584923     .9688509
ia1journal23 |    .9579208    .0031859    -12.93    0.000      .9516969     .9641854
ia1journal24 |    1.041422    .0027133     15.58    0.000      1.036117     1.046754
ia1journal25 |    .9880298    .0045516     -2.61    0.009       .979149     .9969912
ia1journal26 |    .9956779    .0027097     -1.59    0.111      .9903812     1.001003
ia1journal27 |    .9463945    .0020565    -25.35    0.000      .9423724     .9504338
ia1journal28 |    1.022592    .0042885      5.33    0.000      1.014221     1.031031
ia1journal29 |    1.122972    .0037455     34.77    0.000      1.115655     1.130337
ia1journal30 |    1.146629    .0037759     41.55    0.000      1.139252     1.154053
ia1journal31 |    .9388921    .0058376    -10.14    0.000      .9275201     .9504035
ia1journal32 |    1.004062    .0042765      0.95    0.341      .9957154     1.012479
ia1journal33 |    1.003749    .0053833      0.70    0.485       .993253     1.014356
ia1journal34 |    1.099643    .0049058     21.29    0.000      1.090069       1.1093
ia1journal35 |    1.019244    .0033221      5.85    0.000      1.012754     1.025776
ia1journal36 |    .6269568    .0037741    -77.56    0.000      .6196031     .6343978
ia1journal37 |    1.006709    .0026595      2.53    0.011      1.001509     1.011935
ia1journal38 |    .9958526    .0044295     -0.93    0.350      .9872087     1.004572
ia1journal39 |    1.019997    .0025494      7.92    0.000      1.015012     1.025006
ia1journal40 |    1.000144     .005791      0.02    0.980      .9888578     1.011558
ia1journal41 |    1.036265     .003618     10.20    0.000      1.029198      1.04338
ia1journal42 |    1.027211    .0047958      5.75    0.000      1.017854     1.036653
ia1journal43 |    1.019186    .0043656      4.44    0.000      1.010665     1.027778
ia1journal44 |    1.104159    .0028459     38.44    0.000      1.098595     1.109751
ia1journal45 |    1.132377      .00552     25.50    0.000       1.12161     1.143248
ia1journal46 |    1.026177    .0023978     11.06    0.000      1.021488     1.030887
ia1journal47 |    1.003759    .0020405      1.85    0.065      .9997675     1.007766
ia1journal48 |    1.027434    .0038577      7.21    0.000      1.019901     1.035023
ia1journal49 |    .9483472    .0039402    -12.76    0.000      .9406559     .9561014
ia1journal50 |    .9200376    .0026704    -28.71    0.000      .9148185     .9252865
ia1journal51 |    .9337942    .0045613    -14.02    0.000       .924897     .9427771
ia1journal52 |    1.123322    .0069672     18.75    0.000      1.109749     1.137061
ia1journal53 |    .9638872    .0035297    -10.04    0.000      .9569938     .9708302
ia1journal54 |    .9937909    .0066223     -0.93    0.350      .9808959     1.006855
ia1journal55 |    .9903454    .0028104     -3.42    0.001      .9848525      .995869
ia1journal56 |    .9248852    .0081624     -8.85    0.000      .9090247     .9410223
ia1journal57 |    .9953976    .0033175     -1.38    0.166      .9889167     1.001921
ia1journal58 |    1.001247    .0032124      0.39    0.698      .9949709     1.007563
ia1journal59 |    1.073309    .0037817     20.08    0.000      1.065923     1.080747
 ia2journal2 |    .9998858    .0000749     -1.53    0.127      .9997391     1.000033
 ia2journal3 |    1.000015    .0000944      0.16    0.875      .9998299       1.0002
 ia2journal4 |    1.001097    .0000733     14.98    0.000      1.000954     1.001241
 ia2journal5 |    1.000103    .0000627      1.64    0.100      .9999802     1.000226
 ia2journal6 |    .9985168    .0000625    -23.72    0.000      .9983943     .9986393
 ia2journal7 |    .9990108    .0000657    -15.04    0.000       .998882     .9991396
 ia2journal8 |    1.000668    .0000732      9.12    0.000      1.000524     1.000811
 ia2journal9 |    .9995337    .0000737     -6.33    0.000      .9993893      .999678
ia2journal10 |    .9990513    .0000981     -9.67    0.000      .9988591     .9992436
ia2journal11 |    1.000826    .0000874      9.46    0.000      1.000655     1.000998
ia2journal12 |    1.000321    .0000748      4.29    0.000      1.000174     1.000468
ia2journal13 |    .9997507    .0001191     -2.09    0.036      .9995172     .9999842
ia2journal14 |    .9970468    .0000645    -45.74    0.000      .9969205     .9971732
ia2journal15 |    .9995146    .0000882     -5.50    0.000      .9993418     .9996874
ia2journal16 |    .9999154     .000128     -0.66    0.509      .9996646     1.000166
ia2journal17 |    .9997697    .0001411     -1.63    0.103      .9994932     1.000046
ia2journal18 |    1.001577    .0000609     25.91    0.000      1.001457     1.001696
ia2journal19 |    .9980205     .000105    -18.83    0.000      .9978147     .9982264
ia2journal20 |    .9993116    .0000748     -9.20    0.000       .999165     .9994583
ia2journal21 |     .999482    .0000931     -5.56    0.000      .9992995     .9996645
ia2journal22 |    .9995122    .0000611     -7.98    0.000      .9993924      .999632
ia2journal23 |    1.001137    .0000892     12.75    0.000      1.000962     1.001311
ia2journal24 |    .9993542    .0000695     -9.29    0.000      .9992181     .9994904
ia2journal25 |    1.000433    .0001355      3.20    0.001      1.000168     1.000699
ia2journal26 |    .9999515    .0000729     -0.67    0.505      .9998086     1.000094
ia2journal27 |    1.000447    .0000555      8.05    0.000      1.000338     1.000556
ia2journal28 |    .9987889    .0001102    -10.99    0.000       .998573     .9990049
ia2journal29 |    .9975353    .0000812    -30.31    0.000      .9973762     .9976945
ia2journal30 |    .9967249    .0000997    -32.79    0.000      .9965295     .9969203
ia2journal31 |    1.001554    .0001692      9.19    0.000      1.001222     1.001885
ia2journal32 |    .9992622    .0001314     -5.61    0.000      .9990047     .9995197
ia2journal33 |    .9995482    .0001741     -2.59    0.009      .9992071     .9998895
ia2journal34 |    .9973807    .0001522    -17.19    0.000      .9970825      .997679
ia2journal35 |    .9991651    .0000926     -9.01    0.000      .9989835     .9993466
ia2journal36 |    1.008499    .0001811     47.12    0.000      1.008144     1.008854
ia2journal37 |    .9999673    .0000702     -0.47    0.641      .9998297     1.000105
ia2journal38 |    .9997871     .000134     -1.59    0.112      .9995246      1.00005
ia2journal39 |    .9990891    .0000763    -11.94    0.000      .9989396     .9992385
ia2journal40 |    .9999624    .0001234     -0.30    0.761      .9997207     1.000204
ia2journal41 |    .9995903    .0000891     -4.60    0.000      .9994157     .9997649
ia2journal42 |    .9993012    .0001411     -4.95    0.000      .9990246     .9995779
ia2journal43 |    .9987104    .0001249    -10.32    0.000      .9984657     .9989552
ia2journal44 |    .9983537    .0000616    -26.69    0.000      .9982329     .9984745
ia2journal45 |    .9972905    .0001041    -25.98    0.000      .9970864     .9974946
ia2journal46 |    .9994621    .0000569     -9.45    0.000      .9993506     .9995736
ia2journal47 |    .9995239    .0000481     -9.89    0.000      .9994296     .9996183
ia2journal48 |    .9993348     .000078     -8.53    0.000       .999182     .9994876
ia2journal49 |    1.000555    .0001276      4.35    0.000      1.000305     1.000805
ia2journal50 |    1.001003    .0000704     14.26    0.000      1.000865     1.001141
ia2journal51 |    .9934694    .0001765    -36.89    0.000      .9931236     .9938153
ia2journal52 |    .9970433    .0001573    -18.76    0.000       .996735     .9973517
ia2journal53 |     .999909    .0001174     -0.78    0.438       .999679     1.000139
ia2journal54 |    .9975488    .0002321    -10.55    0.000       .997094     .9980038
ia2journal55 |    .9997347    .0000804     -3.30    0.001      .9995771     .9998922
ia2journal56 |    1.002068    .0002398      8.63    0.000      1.001598     1.002538
ia2journal57 |    .9992694    .0000906     -8.06    0.000       .999092     .9994469
ia2journal58 |    .9999466    .0000751     -0.71    0.478      .9997994     1.000094
ia2journal59 |    .9984194    .0001198    -13.18    0.000      .9981846     .9986542
       d1c95 |    1.028475    .0292033      0.99    0.323      .9728006     1.087335
       d1c00 |    1.012821     .027207      0.47    0.635      .9608762     1.067575
       d2c95 |    .9898895    .0332439     -0.30    0.762      .9268308     1.057239
       d2c00 |      1.0252    .0237821      1.07    0.283      .9796316     1.072888
-------------+----------------------------------------------------------------
Wald chi2(370) = -3.0e+17                                Prob > chi2 =   1.0000

.  * Column 5: Evans replication, with journal volume fixed effects, citation lags;
. xtpqml cit cit_lag d1c* d2c*, i(volume) irr fe cluster(journal);
note: 13 groups (325 obs) dropped because of all zero outcomes

Iteration 0:   log likelihood = -33231.247
Iteration 1:   log likelihood = -29871.759
Iteration 2:   log likelihood = -29856.223
Iteration 3:   log likelihood = -29856.223

Conditional fixed-effects Poisson regression    Number of obs     =     11,700
Group variable: volume                          Number of groups  =        468

                                                Obs per group:
                                                              min =         25
                                                              avg =       25.0
                                                              max =         25

                                                Wald chi2(5)      =    6706.38
Log likelihood  = -29856.223                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     cit_lag |    .0071044     .000111     64.01    0.000      .0068869      .007322
       d1c95 |   -.0401196    .0168509     -2.38    0.017     -.0731467    -.0070925
       d1c00 |   -.2195212    .0178924    -12.27    0.000     -.2545897    -.1844527
       d2c95 |   -.1257516     .012102    -10.39    0.000     -.1494711    -.1020321
       d2c00 |   -.1706972    .0064321    -26.54    0.000     -.1833039    -.1580905
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     cit_lag |     1.00713      .00113      6.33    0.000      1.004917     1.009347
       d1c95 |    .9606745    .0370075     -1.04    0.298      .8908117     1.036016
       d1c00 |    .8029031    .0360601     -4.89    0.000      .7352481     .8767836
       d2c95 |    .8818338    .0250634     -4.42    0.000      .8340537     .9323512
       d2c00 |    .8430768    .0209467     -6.87    0.000      .8030055     .8851477
-------------+----------------------------------------------------------------
Wald chi2(5) =    82.89                                Prob > chi2 =   0.0000

. * Column 6: Combine citation lags with journal volumen fixed effects,
> * time effects, and age profiles;
.   xtpqml cit cit_lag ip* ia1j* ia2j* d1c* d2c*, i(volume) irr fe cluster(journal);
note: 13 groups (325 obs) dropped because of all zero outcomes
note: ip66c80 dropped because of collinearity
note: ip67c80 dropped because of collinearity
note: ip68c80 dropped because of collinearity
note: ip69c80 dropped because of collinearity
note: ip70c80 dropped because of collinearity
note: ip71c80 dropped because of collinearity
note: ip72c80 dropped because of collinearity
note: ip73c80 dropped because of collinearity
note: ip74c80 dropped because of collinearity
note: ip75c80 dropped because of collinearity

Iteration 0:   log likelihood = -33231.247
Iteration 1:   log likelihood = -26483.207
Iteration 2:   log likelihood = -26342.535
Iteration 3:   log likelihood = -26339.105
Iteration 4:   log likelihood = -26338.619
Iteration 5:   log likelihood = -26338.611
Iteration 6:   log likelihood = -26338.611

Conditional fixed-effects Poisson regression    Number of obs     =     11,700
Group variable: volume                          Number of groups  =        468

                                                Obs per group:
                                                              min =         25
                                                              avg =       25.0
                                                              max =         25

                                                Wald chi2(361)    =   13455.81
Log likelihood  = -26338.611                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     cit_lag |    .0043787    .0001688     25.94    0.000      .0040478     .0047096
     ip66c81 |    .2467782    .0823831      3.00    0.003      .0853103     .4082462
     ip66c82 |    .2956834    .0823618      3.59    0.000      .1342572     .4571097
     ip66c83 |    .2376472    .0831752      2.86    0.004      .0746268     .4006675
     ip66c84 |    .2112962    .0839704      2.52    0.012      .0467171     .3758752
     ip66c85 |    .2855828    .0834656      3.42    0.001      .1219932     .4491724
     ip66c86 |    .1783283     .084748      2.10    0.035      .0122252     .3444313
     ip66c87 |    .2907547    .0832392      3.49    0.000      .1276088     .4539006
     ip66c88 |    .1404871     .085408      1.64    0.100     -.0269096     .3078838
     ip66c89 |    .0498245    .0869877      0.57    0.567     -.1206683     .2203173
     ip66c90 |     .178327     .085177      2.09    0.036      .0113832     .3452709
     ip66c91 |    .0225524    .0871854      0.26    0.796     -.1483279     .1934327
     ip66c92 |    .0185057    .0875005      0.21    0.833     -.1529921     .1900035
     ip66c93 |    .0336639    .0868479      0.39    0.698     -.1365548     .2038826
     ip66c94 |    .0050575    .0871578      0.06    0.954     -.1657687     .1758837
     ip66c95 |    -.101278    .0887167     -1.14    0.254     -.2751596     .0726035
     ip66c96 |     -.00089    .0867442     -0.01    0.992     -.1709056     .1691256
     ip66c97 |   -.0221654    .0864171     -0.26    0.798     -.1915398     .1472089
     ip66c98 |   -.0560053    .0867017     -0.65    0.518     -.2259376      .113927
     ip66c99 |     .040821    .0844178      0.48    0.629     -.1246347     .2062768
     ip67c81 |    .7237405    .0993917      7.28    0.000      .5289364     .9185447
     ip67c82 |    .6877012     .100146      6.87    0.000      .4914188     .8839837
     ip67c83 |    .6920204    .1005145      6.88    0.000      .4950157     .8890252
     ip67c84 |    .7435783    .1001286      7.43    0.000      .5473299     .9398267
     ip67c85 |    .7213821    .1005735      7.17    0.000      .5242615     .9185026
     ip67c86 |    .5500302    .1028418      5.35    0.000       .348464     .7515964
     ip67c87 |    .5892712    .1028397      5.73    0.000       .387709     .7908333
     ip67c88 |    .5348164    .1037451      5.16    0.000      .3314798     .7381531
     ip67c89 |    .4581942    .1048289      4.37    0.000      .2527332     .6636551
     ip67c90 |    .4627345    .1049132      4.41    0.000      .2571085     .6683605
     ip67c91 |    .3932629    .1059378      3.71    0.000      .1856286     .6008971
     ip67c92 |    .3273049    .1071398      3.05    0.002      .1173148     .5372949
     ip67c93 |    .4563604    .1046306      4.36    0.000      .2512882     .6614327
     ip67c94 |    .3151709    .1068788      2.95    0.003      .1056923     .5246495
     ip67c95 |     .288591    .1073008      2.69    0.007      .0782853     .4988968
     ip67c96 |    .3647323    .1051599      3.47    0.001      .1586227     .5708419
     ip67c97 |    .3827281    .1045345      3.66    0.000      .1778443      .587612
     ip67c98 |    .3132392    .1055312      2.97    0.003      .1064019     .5200766
     ip67c99 |    .3853675    .1035539      3.72    0.000      .1824055     .5883295
     ip68c81 |    .1071909    .0700145      1.53    0.126      -.030035     .2444169
     ip68c82 |    .0782974    .0709252      1.10    0.270     -.0607134     .2173082
     ip68c83 |    .1951607    .0698606      2.79    0.005      .0582364      .332085
     ip68c84 |    .0671583    .0713861      0.94    0.347     -.0727558     .2070725
     ip68c85 |    .1673954    .0706441      2.37    0.018      .0289355     .3058552
     ip68c86 |    .0465966    .0721409      0.65    0.518     -.0947969     .1879901
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ia1journal32 |    -.048633     .027775     -1.75    0.080      -.103071      .005805
ia1journal33 |    -.039112    .0351172     -1.11    0.265     -.1079405     .0297164
ia1journal34 |     .063824    .0305173      2.09    0.036      .0040113     .1236368
ia1journal35 |   -.0325728    .0337035     -0.97    0.334     -.0986305     .0334848
ia1journal36 |   -.9531312    .1034299     -9.22    0.000      -1.15585    -.7504123
ia1journal37 |   -.0472146    .0118558     -3.98    0.000     -.0704517    -.0239776
ia1journal38 |   -.0840958    .0278619     -3.02    0.003     -.1387042    -.0294874
ia1journal39 |    -.027941    .0187718     -1.49    0.137      -.064733      .008851
ia1journal40 |   -.0376403    .0414716     -0.91    0.364     -.1189231     .0436424
ia1journal41 |   -.0075079    .0091063     -0.82    0.410      -.025356     .0103401
ia1journal42 |   -.0091414    .0382951     -0.24    0.811     -.0841984     .0659157
ia1journal43 |    .0091663    .0255629      0.36    0.720      -.040936     .0592686
ia1journal44 |    .0557828    .0118751      4.70    0.000      .0325081     .0790575
ia1journal45 |    .0931364    .0349656      2.66    0.008       .024605     .1616678
ia1journal46 |   -.0274522    .0122983     -2.23    0.026     -.0515564    -.0033479
ia1journal47 |   -.0210962    .0090935     -2.32    0.020      -.038919    -.0032733
ia1journal48 |   -.0313009    .0285835     -1.10    0.273     -.0873234     .0247217
ia1journal49 |   -.0632199    .0325616     -1.94    0.052     -.1270395     .0005998
ia1journal50 |     -.12366    .0224135     -5.52    0.000     -.1675896    -.0797304
ia1journal51 |    .0353767     .192875      0.18    0.854     -.3426513     .4134047
ia1journal52 |    .0143948    .0693915      0.21    0.836       -.12161     .1503996
ia1journal53 |   -.0909016    .0526907     -1.73    0.084     -.1941735     .0123703
ia1journal54 |     .008887    .0774873      0.11    0.909     -.1429854     .1607593
ia1journal55 |    -.048449    .0259301     -1.87    0.062      -.099271     .0023729
ia1journal56 |   -.1540629    .0569123     -2.71    0.007      -.265609    -.0425169
ia1journal57 |   -.0398654    .0130695     -3.05    0.002     -.0654811    -.0142497
ia1journal58 |   -.0857394    .0383481     -2.24    0.025     -.1609002    -.0105785
ia1journal59 |    .0543004    .0272505      1.99    0.046      .0008904     .1077103
 ia2journal2 |       .0002    .0001715      1.17    0.244     -.0001361     .0005361
 ia2journal3 |    .0007087    .0002024      3.50    0.000       .000312     .0011055
 ia2journal4 |    .0013781    .0002057      6.70    0.000      .0009749     .0017813
 ia2journal5 |    .0000751    .0001482      0.51    0.612     -.0002153     .0003655
 ia2journal6 |   -.0009989    .0007361     -1.36    0.175     -.0024416     .0004438
 ia2journal7 |   -.0006927    .0004224     -1.64    0.101     -.0015207     .0001353
 ia2journal8 |    .0011472    .0003163      3.63    0.000      .0005272     .0017672
 ia2journal9 |     .000177    .0002049      0.86    0.388     -.0002246     .0005785
ia2journal10 |   -.0001322    .0004285     -0.31    0.758      -.000972     .0007076
ia2journal11 |    .0015096     .000234      6.45    0.000      .0010509     .0019683
ia2journal12 |    .0008246    .0004575      1.80    0.071      -.000072     .0017213
ia2journal13 |    .0004525    .0002847      1.59    0.112     -.0001054     .0010105
ia2journal14 |   -.0017345    .0006718     -2.58    0.010     -.0030513    -.0004178
ia2journal15 |    .0004488    .0003752      1.20    0.232     -.0002865     .0011841
ia2journal16 |    .0003524      .00128      0.28    0.783     -.0021563     .0028612
ia2journal17 |     .000352    .0002674      1.32    0.188     -.0001721     .0008761
ia2journal18 |    .0026861    .0005158      5.21    0.000      .0016751     .0036972
ia2journal19 |   -.0010561    .0003373     -3.13    0.002     -.0017172    -.0003949
ia2journal20 |    -.000111    .0001923     -0.58    0.564      -.000488      .000266
ia2journal21 |    .0002454    .0006226      0.39    0.693     -.0009749     .0014657
ia2journal22 |    -.000564    .0008916     -0.63    0.527     -.0023114     .0011834
ia2journal23 |    .0020627    .0004475      4.61    0.000      .0011856     .0029398
ia2journal24 |    .0000556    .0001864      0.30    0.766     -.0003098     .0004209
ia2journal25 |    .0015303    .0005093      3.01    0.003      .0005322     .0025285
ia2journal26 |    .0006791    .0003934      1.73    0.084      -.000092     .0014502
ia2journal27 |    .0010388    .0005016      2.07    0.038      .0000558     .0020219
ia2journal28 |    -.000888    .0006197     -1.43    0.152     -.0021027     .0003267
ia2journal29 |   -.0027935    .0017443     -1.60    0.109     -.0062122     .0006251
ia2journal30 |   -.0023782     .000681     -3.49    0.000      -.003713    -.0010435
ia2journal31 |    .0014488    .0021305      0.68    0.496     -.0027268     .0056245
ia2journal32 |    .0001612    .0007902      0.20    0.838     -.0013877       .00171
ia2journal33 |    .0002064    .0009043      0.23    0.819      -.001566     .0019788
ia2journal34 |   -.0022773    .0007376     -3.09    0.002      -.003723    -.0008317
ia2journal35 |   -.0000669    .0008289     -0.08    0.936     -.0016915     .0015577
ia2journal36 |    .0205963    .0028899      7.13    0.000      .0149321     .0262605
ia2journal37 |    .0008117    .0002726      2.98    0.003      .0002774      .001346
ia2journal38 |     .001138    .0006556      1.74    0.083     -.0001469      .002423
ia2journal39 |   -.0001139    .0004441     -0.26    0.798     -.0009844     .0007566
ia2journal40 |    .0004989    .0009957      0.50    0.616     -.0014526     .0024505
ia2journal41 |    .0002715    .0002134      1.27    0.203     -.0001468     .0006897
ia2journal42 |   -.0002761    .0010432     -0.26    0.791     -.0023207     .0017685
ia2journal43 |   -.0014194    .0006722     -2.11    0.035     -.0027368    -.0001019
ia2journal44 |   -.0010054    .0002735     -3.68    0.000     -.0015414    -.0004695
ia2journal45 |   -.0023247    .0008633     -2.69    0.007     -.0040167    -.0006327
ia2journal46 |    .0003651    .0002852      1.28    0.200     -.0001938      .000924
ia2journal47 |   -.0000727    .0002155     -0.34    0.736      -.000495     .0003497
ia2journal48 |    .0002613    .0006894      0.38    0.705     -.0010899     .0016126
ia2journal49 |    .0003454    .0009197      0.38    0.707     -.0014571     .0021479
ia2journal50 |    .0016137    .0005338      3.02    0.003      .0005674       .00266
ia2journal51 |   -.0108024    .0066186     -1.63    0.103     -.0237746     .0021698
ia2journal52 |   -.0009144      .00191     -0.48    0.632     -.0046579      .002829
ia2journal53 |    .0007649    .0013367      0.57    0.567     -.0018549     .0033848
ia2journal54 |   -.0035943    .0025062     -1.43    0.152     -.0085063     .0013176
ia2journal55 |    .0002571    .0006008      0.43    0.669     -.0009205     .0014348
ia2journal56 |    .0033739    .0013595      2.48    0.013      .0007094     .0060384
ia2journal57 |   -.0001907    .0003234     -0.59    0.555     -.0008246     .0004432
ia2journal58 |    .0014825    .0008703      1.70    0.088     -.0002232     .0031883
ia2journal59 |   -.0014753    .0006662     -2.21    0.027      -.002781    -.0001695
       d1c95 |    .0612526     .021219      2.89    0.004      .0196642     .1028411
       d1c00 |    .0253581    .0270657      0.94    0.349     -.0276897     .0784059
       d2c95 |    .0030437    .0169922      0.18    0.858     -.0302603     .0363478
       d2c00 |    .0311325    .0222299      1.40    0.161     -.0124373     .0747022
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     cit_lag |    1.004388    .0003182     13.82    0.000      1.003765     1.005012
     ip66c81 |    1.279895    .1472452      2.15    0.032      1.021523     1.603617
     ip66c82 |    1.344045     .135812      2.93    0.003       1.10256      1.63842
     ip66c83 |    1.268262    .1326599      2.27    0.023      1.033174     1.556841
     ip66c84 |    1.235278    .1817968      1.44    0.151       .925748     1.648302
     ip66c85 |    1.330537    .1352542      2.81    0.005      1.090182     1.623884
     ip66c86 |    1.195218    .1282913      1.66    0.097      .9684594      1.47507
     ip66c87 |    1.337436    .2111037      1.84    0.065      .9815622     1.822336
     ip66c88 |    1.150834    .1131959      1.43    0.153      .9490491     1.395523
     ip66c89 |    1.051087    .1402809      0.37    0.709      .8091608     1.365344
     ip66c90 |    1.195216    .1831223      1.16    0.244      .8851799     1.613843
     ip66c91 |    1.022809    .1181654      0.20    0.845      .8155579     1.282726
     ip66c92 |    1.018678    .1053241      0.18    0.858      .8318187     1.247513
     ip66c93 |    1.034237    .1450063      0.24    0.810      .7857355     1.361331
     ip66c94 |     1.00507    .0885627      0.06    0.954      .8456527      1.19454
     ip66c95 |    .9036817    .1037323     -0.88    0.378       .721618      1.13168
     ip66c96 |    .9991104    .1028918     -0.01    0.993      .8164956     1.222568
     ip66c97 |    .9780784    .1149452     -0.19    0.850      .7768536     1.231426
     ip66c98 |    .9455341    .0933345     -0.57    0.570      .7792097     1.147361
     ip66c99 |    1.041666     .113443      0.37    0.708      .8414492     1.289522
     ip67c81 |    2.062132    .2357877      6.33    0.000      1.648119     2.580146
     ip67c82 |    1.989138    .2385091      5.74    0.000      1.572537     2.516105
     ip67c83 |    1.997748    .2490767      5.55    0.000      1.564638     2.550747
     ip67c84 |    2.103449    .2015639      7.76    0.000      1.743272     2.538041
     ip67c85 |    2.057275    .2684366      5.53    0.000      1.593038     2.656797
     ip67c86 |    1.733305    .2239234      4.26    0.000       1.34558     2.232753
     ip67c87 |    1.802674    .2031886      5.23    0.000      1.445353     2.248332
     ip67c88 |    1.707135    .1739449      5.25    0.000      1.398094     2.084487
     ip67c89 |    1.581216    .1787948      4.05    0.000        1.2669     1.973514
     ip67c90 |    1.588412    .1563136      4.70    0.000      1.309777     1.926321
     ip67c91 |    1.481808    .1352179      4.31    0.000      1.239133     1.772008
     ip67c92 |    1.387224     .168709      2.69    0.007      1.093017     1.760624
     ip67c93 |    1.578319    .1757874      4.10    0.000      1.268794     1.963354
     ip67c94 |    1.370493     .144131      3.00    0.003      1.115215     1.684207
     ip67c95 |    1.334546    .1143396      3.37    0.001       1.12825     1.578562
     ip67c96 |    1.440128    .0954989      5.50    0.000      1.264607     1.640011
     ip67c97 |    1.466279    .1108628      5.06    0.000      1.264325     1.700492
     ip67c98 |    1.367849    .1222456      3.50    0.000      1.148063     1.629711
     ip67c99 |    1.470155    .1325554      4.27    0.000      1.232012     1.754329
     ip68c81 |    1.113147    .0915687      1.30    0.193      .9473963     1.307896
     ip68c82 |    1.081444    .0728919      1.16    0.245      .9476132     1.234176
     ip68c83 |    1.215506    .1114432      2.13    0.033      1.015582     1.454787
     ip68c84 |    1.069465    .0905988      0.79    0.428      .9058529     1.262628
     ip68c85 |    1.182222      .09354      2.12    0.034      1.012395     1.380536
     ip68c86 |    1.047699    .0803715      0.61    0.544      .9014444     1.217683
     ip68c87 |    1.135327    .0920514      1.57    0.117      .9685151      1.33087
     ip68c88 |    1.054291    .0845885      0.66    0.510      .9008792     1.233828
     ip68c89 |     .936245    .0658758     -0.94    0.349      .8156381     1.074686
     ip68c90 |    .9928402    .0775314     -0.09    0.927      .8519392     1.157045
     ip68c91 |    .9182922    .0629743     -1.24    0.214      .8028003     1.050399
     ip68c92 |    .9115985    .0959192     -0.88    0.379      .7417191     1.120386
     ip68c93 |    1.097779     .078066      1.31    0.190      .9549565     1.261961
     ip68c94 |    .9483268    .0726053     -0.69    0.488      .8161853     1.101862
     ip68c95 |    .9091308    .0909559     -0.95    0.341      .7472504      1.10608
     ip68c96 |    1.078022    .0746882      1.08    0.278      .9411402     1.234813
     ip68c97 |    1.002638    .0993118      0.03    0.979      .8257189     1.217464
     ip68c98 |    .9457545     .073582     -0.72    0.473      .8119942     1.101549
     ip68c99 |    .9678039    .0939884     -0.34    0.736      .8000604     1.170717
     ip69c81 |    1.301974    .1750712      1.96    0.050      1.000333     1.694571
     ip69c82 |    1.429558    .1628487      3.14    0.002      1.143502     1.787174
     ip69c83 |      1.4684    .1961188      2.88    0.004      1.130208      1.90779
     ip69c84 |    1.361891    .1591498      2.64    0.008      1.083107     1.712432
     ip69c85 |    1.419703    .1655022      3.01    0.003      1.129714      1.78413
     ip69c86 |    1.284717    .1500526      2.15    0.032      1.021854       1.6152
     ip69c87 |    1.320583     .156585      2.35    0.019      1.046734     1.666076
     ip69c88 |     1.12159    .1311631      0.98    0.326      .8918486     1.410512
     ip69c89 |    1.206022    .1351316      1.67    0.095      .9682344     1.502209
     ip69c90 |     1.21607    .0981276      2.42    0.015      1.038181      1.42444
     ip69c91 |     1.12623    .1025324      1.31    0.192      .9421787     1.346234
     ip69c92 |    1.182312    .1214826      1.63    0.103       .966654     1.446082
     ip69c93 |    1.101795      .10749      0.99    0.320       .910036     1.333961
     ip69c94 |    1.028223    .0982228      0.29    0.771      .8526576     1.239937
     ip69c95 |    1.061183    .1064423      0.59    0.554      .8717872     1.291726
     ip69c96 |    1.044917    .0676858      0.68    0.498      .9203307     1.186368
     ip69c97 |    .9893231    .1094298     -0.10    0.923      .7965005     1.228826
     ip69c98 |    .9759468    .0887604     -0.27    0.789      .8166032     1.166383
     ip69c99 |    1.105343    .1113032      0.99    0.320      .9073704     1.346509
     ip70c81 |    1.369993    .0977573      4.41    0.000      1.191187     1.575639
     ip70c82 |    1.329963    .0964754      3.93    0.000      1.153702     1.533154
     ip70c83 |     1.42651    .0902642      5.61    0.000      1.260126     1.614862
     ip70c84 |    1.347661    .0742768      5.41    0.000      1.209668     1.501395
     ip70c85 |    1.477496    .0923051      6.25    0.000      1.307219     1.669953
     ip70c86 |    1.312002    .0707558      5.04    0.000      1.180401     1.458275
     ip70c87 |    1.436151    .0957375      5.43    0.000       1.26025     1.636603
     ip70c88 |    1.294399    .0674262      4.95    0.000      1.168768     1.433533
     ip70c89 |    1.259087     .084035      3.45    0.001      1.104699     1.435051
     ip70c90 |    1.311339    .0536614      6.62    0.000      1.210272     1.420846
     ip70c91 |    1.223693    .0441606      5.59    0.000       1.14013      1.31338
     ip70c92 |    1.241395    .1033612      2.60    0.009      1.054477     1.461446
     ip70c93 |    1.154164    .0705433      2.35    0.019      1.023862     1.301048
     ip70c94 |    1.161916    .0663371      2.63    0.009      1.038908     1.299488
     ip70c95 |    1.176409     .071665      2.67    0.008       1.04401       1.3256
     ip70c96 |    1.196567    .0761732      2.82    0.005      1.056208     1.355577
     ip70c97 |    1.109933    .0575935      2.01    0.044      1.002602     1.228754
     ip70c98 |    1.081015    .0873266      0.96    0.335      .9227203     1.266466
     ip70c99 |    1.141229    .0508763      2.96    0.003      1.045745      1.24543
     ip71c81 |    1.218606    .1558521      1.55    0.122       .948418     1.565765
     ip71c82 |    1.291065    .1621175      2.03    0.042      1.009401     1.651324
     ip71c83 |    1.357599    .1769867      2.35    0.019      1.051484     1.752833
     ip71c84 |     1.21396    .1174768      2.00    0.045      1.004228     1.467494
     ip71c85 |    1.269581    .1528366      1.98    0.047      1.002743     1.607426
     ip71c86 |    1.313049    .1643887      2.18    0.030      1.027339     1.678217
     ip71c87 |    1.198688    .1313307      1.65    0.098       .967045     1.485818
     ip71c88 |    1.209119    .1289039      1.78    0.075       .981121       1.4901
     ip71c89 |    1.142623    .1106357      1.38    0.169      .9451147     1.381407
     ip71c90 |    1.203044    .1420617      1.57    0.117      .9544811     1.516337
     ip71c91 |    1.191819    .1149854      1.82    0.069      .9864781     1.439903
     ip71c92 |    1.066309    .1212158      0.56    0.572       .853336     1.332434
     ip71c93 |    1.119184    .0972787      1.30    0.195      .9438779      1.32705
     ip71c94 |    1.039401    .0996585      0.40    0.687      .8613297     1.254287
     ip71c95 |     1.10078    .1174144      0.90    0.368      .8931148     1.356731
     ip71c96 |    1.063367    .1033573      0.63    0.527      .8789172     1.286525
     ip71c97 |    1.105544    .0882113      1.26    0.209      .9454942     1.292687
     ip71c98 |    1.008098    .0740315      0.11    0.913      .8729576     1.164159
     ip71c99 |    1.029854    .0882059      0.34    0.731       .870705     1.218092
     ip72c81 |    1.146902    .1008764      1.56    0.119      .9652917     1.362682
     ip72c82 |    1.204665    .1004392      2.23    0.026      1.023051      1.41852
     ip72c83 |    1.351702    .1081864      3.77    0.000      1.155456      1.58128
     ip72c84 |     1.18834    .0989453      2.07    0.038      1.009408     1.398991
     ip72c85 |    1.197413    .1127967      1.91    0.056       .995544     1.440215
     ip72c86 |    1.161617    .0886995      1.96    0.050      1.000153     1.349148
     ip72c87 |    1.170755    .0716457      2.58    0.010      1.038426     1.319946
     ip72c88 |    1.110644    .0995088      1.17    0.241      .9317749      1.32385
     ip72c89 |    1.088419    .0717922      1.28    0.199      .9564251      1.23863
     ip72c90 |    1.033326    .0800749      0.42    0.672      .8877198     1.202816
     ip72c91 |    1.056756    .0594991      0.98    0.327      .9463443      1.18005
     ip72c92 |    1.056817    .0496413      1.18    0.239      .9638666     1.158732
     ip72c93 |    1.069311    .0590935      1.21    0.225      .9595419     1.191637
     ip72c94 |    .9745192    .0605098     -0.42    0.678      .8628546     1.100635
     ip72c95 |    1.069599    .0549571      1.31    0.190      .9671313     1.182923
     ip72c96 |      1.0731    .0496854      1.52    0.128      .9800066     1.175037
     ip72c97 |    .8967044    .0477163     -2.05    0.040      .8078941     .9952776
     ip72c98 |    1.001648    .0411474      0.04    0.968      .9241619     1.085631
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ia2journal58 |    1.001484     .000096     15.46    0.000      1.001295     1.001672
ia2journal59 |    .9985258    .0001455    -10.13    0.000      .9982408      .998811
       d1c95 |    1.063167    .0333223      1.95    0.051      .9998225     1.130526
       d1c00 |    1.025682    .0291521      0.89    0.372      .9701075     1.084441
       d2c95 |    1.003048      .02748      0.11    0.912      .9506091      1.05838
       d2c00 |    1.031622    .0285586      1.12    0.261      .9771398     1.089142
-------------+----------------------------------------------------------------
Wald chi2(361) =  3.2e+16                                Prob > chi2 =   0.0000

. **********************************************************************;
. *** 1976-1985                                                      ***;
. **********************************************************************;
. clear;

. use temp_data;

. gen plower = 1976;

. gen pupper = 1985;

. keep if pyear >= plower & pyear <= pupper;
(42,012 observations deleted)

. * Create fixed effects for publication x citation year interactions;
. * Drop the 2005 cyear to avoid multicolinearity with the constant;
. * Don't create variables with pyear after cyear;
. * Do create variables with pyear = cyear since keeping age0 = 1 observations;
. forvalues y = 56/99 {;
  2.    forvalues x = 80/99 {;
  3.       quietly gen ip`y'c`x' = py19`y' * c`x' if
>          (`x' >= `y')
>        & (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 56/99 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip`y'c0`x' = py19`y' * c0`x' if
>          (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 0/5 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip0`y'c0`x' = py200`y' * c0`x' if
>          (`x' >= `y')
>        & (2000 + `y' >= plower)
>        & (2000 + `y' <= pupper);
  4.    };
  5. };

. foreach var of varlist ip* {;
  2.    capture assert !missing(`var');
  3.    if _rc {;
  4.       drop `var';
  5.    };
  6. };

. egen title = group(journal);

. rename journal smournal;

. quietly tabulate title, generate(journal);

. drop title;

. foreach var of varlist journal* {;
  2.    quietly gen ia1`var' = age * `var';
  3.    quietly gen ia2`var' = age2 * `var';
  4.    quietly gen ia3`var' = age3 * `var';
  5.    quietly gen ia4`var' = age4 * `var';
  6. };

. rename smournal journal;

. * Avoid multicolinearity by dropping first journal's age profile;
.  drop ia1journal1 ia2journal1 ia3journal1 ia4journal1;

.  * Column 1: No fixed effects or journal age profile;
. poisson cit  ip* d1c* d2c*, irr cluster(journal);

Iteration 0:   log pseudolikelihood = -484999.04
Iteration 1:   log pseudolikelihood = -483406.99
Iteration 2:   log pseudolikelihood = -483404.08
Iteration 3:   log pseudolikelihood = -483404.08

Poisson regression                              Number of obs     =     18,441
                                                Wald chi2(85)     =          .
Log pseudolikelihood = -483404.08               Prob > chi2       =          .

(Std. Err. adjusted for 87 clusters in journal)
-------------+----------------------------------------------------------------
             |               Robust
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip76c80 |    4.234533    1.150705      5.31    0.000      2.485978     7.212963
     ip76c81 |    4.358741    1.161386      5.53    0.000      2.585583     7.347907
     ip76c82 |    4.254145    1.115865      5.52    0.000      2.544143     7.113493
     ip76c83 |     4.36201    1.150884      5.58    0.000      2.600779     7.315934
     ip76c84 |    4.175697    1.049851      5.68    0.000      2.551059     6.834983
     ip76c85 |    4.118496    1.020471      5.71    0.000      2.534136     6.693409
     ip76c86 |    3.897862    .9541021      5.56    0.000      2.412531     6.297671
     ip76c87 |    3.695206    .8813262      5.48    0.000      2.315381     5.897321
     ip76c88 |    3.384684    .8271436      4.99    0.000      2.096539     5.464286
     ip76c89 |    3.278453    .7765596      5.01    0.000      2.060852     5.215442
     ip76c90 |    3.435348     .787083      5.39    0.000       2.19255       5.3826
     ip76c91 |    3.067626    .7201723      4.77    0.000      1.936287     4.859986
     ip76c92 |    2.864969    .6695682      4.50    0.000      1.812119      4.52953
     ip76c93 |    2.773447    .6740019      4.20    0.000      1.722508     4.465587
     ip76c94 |    2.544642    .5821354      4.08    0.000      1.625167      3.98433
     ip76c95 |    2.660679    .6442613      4.04    0.000      1.655317     4.276651
     ip76c96 |    2.406304    .4188747      5.04    0.000      1.710718     3.384717
     ip76c97 |    1.808611    .2981153      3.59    0.000      1.309305     2.498329
     ip76c98 |    1.754347    .3215377      3.07    0.002      1.224918     2.512605
     ip76c99 |    1.473979    .3157255      1.81    0.070      .9686449     2.242943
     ip77c80 |    4.209922    1.267798      4.77    0.000      2.333128     7.596428
     ip77c81 |    4.408204    1.225296      5.34    0.000      2.556602     7.600814
     ip77c82 |    4.271786    1.247495      4.97    0.000      2.410083     7.571588
     ip77c83 |    4.414549    1.242692      5.27    0.000      2.542575     7.664765
     ip77c84 |    4.427239    1.216658      5.41    0.000      2.583524     7.586707
     ip77c85 |    4.370134    1.213833      5.31    0.000      2.535526     7.532192
     ip77c86 |    4.155989     1.11934      5.29    0.000      2.451425     7.045797
     ip77c87 |    3.981501    1.035669      5.31    0.000       2.39129     6.629205
     ip77c88 |     3.68963    .9808507      4.91    0.000      2.191288     6.212496
     ip77c89 |    3.603972    .9874385      4.68    0.000      2.106512     6.165934
     ip77c90 |    3.434243    .9017503      4.70    0.000      2.052701     5.745611
     ip77c91 |    3.235961    .8956699      4.24    0.000      1.881058     5.566782
     ip77c92 |    2.983746    .7662529      4.26    0.000      1.803706     4.935806
     ip77c93 |    2.921882    .7764084      4.04    0.000       1.73572     4.918648
     ip77c94 |    2.793396    .7549866      3.80    0.000       1.64465     4.744511
     ip77c95 |    2.771188    .7052547      4.01    0.000      1.682826     4.563446
     ip77c96 |    2.519048    .5074651      4.59    0.000      1.697309     3.738626
     ip77c97 |     2.04473    .3647912      4.01    0.000      1.441375     2.900648
     ip77c98 |    1.778016    .3351721      3.05    0.002      1.228786     2.572733
     ip77c99 |    1.550528    .3074177      2.21    0.027      1.051272     2.286885
     ip78c80 |    3.662664    1.015402      4.68    0.000      2.127248     6.306321
     ip78c81 |    4.412962    1.201932      5.45    0.000      2.587579     7.526046
     ip78c82 |    4.292407    1.193058      5.24    0.000      2.489503     7.400978
     ip78c83 |    4.620762    1.221076      5.79    0.000       2.75281     7.756235
     ip78c84 |     4.57476    1.226576      5.67    0.000      2.704867     7.737325
     ip78c85 |    4.582692    1.263061      5.52    0.000      2.670031     7.865477
     ip78c86 |     4.29558    1.178106      5.31    0.000      2.509407     7.353132
     ip78c87 |    4.065572    1.143568      4.99    0.000      2.342583     7.055834
     ip78c88 |    3.938672     1.10172      4.90    0.000      2.276423       6.8147
     ip78c89 |    3.675354     1.05228      4.55    0.000      2.096979     6.441754
     ip78c90 |    3.621421    1.043885      4.46    0.000      2.058343     6.371479
     ip78c91 |    3.369206    1.039119      3.94    0.000      1.840784     6.166692
     ip78c92 |    3.164579    .9473929      3.85    0.000      1.759901     5.690411
     ip78c93 |    3.023403    .8749328      3.82    0.000      1.714626     5.331169
     ip78c94 |     2.90602    .8679651      3.57    0.000      1.618315      5.21836
     ip78c95 |    2.877467    .8543282      3.56    0.000      1.608001     5.149138
     ip78c96 |     2.59058    .6334667      3.89    0.000      1.604188      4.18349
     ip78c97 |    1.984942    .3910447      3.48    0.001      1.349138      2.92038
     ip78c98 |    1.915803     .365472      3.41    0.001      1.318165     2.784403
     ip78c99 |    1.519214    .2978003      2.13    0.033      1.034581     2.230867
     ip79c80 |    2.327037    .6657687      2.95    0.003       1.32823      4.07693
     ip79c81 |    3.843497    1.084137      4.77    0.000      2.211198     6.680752
     ip79c82 |    4.701661    1.333654      5.46    0.000      2.696516     8.197843
     ip79c83 |    5.056982    1.413285      5.80    0.000      2.924182     8.745375
     ip79c84 |    5.018912      1.3617      5.95    0.000      2.948946     8.541857
     ip79c85 |     5.07919     1.45643      5.67    0.000      2.895457     8.909878
     ip79c86 |     4.89677    1.420441      5.48    0.000      2.773292     8.646172
     ip79c87 |    4.763525    1.429676      5.20    0.000      2.645193     8.578265
     ip79c88 |    4.595382    1.318969      5.31    0.000      2.618239     8.065548
     ip79c89 |    4.424066    1.266109      5.20    0.000      2.524754     7.752187
     ip79c90 |    4.476413    1.337509      5.02    0.000      2.492294      8.04009
     ip79c91 |      4.1893    1.304761      4.60    0.000      2.275276     7.713455
     ip79c92 |    4.065572    1.300484      4.38    0.000       2.17191     7.610298
     ip79c93 |    3.968811    1.222314      4.48    0.000      2.170238      7.25794
     ip79c94 |    3.899016    1.274123      4.16    0.000      2.054938     7.397947
     ip79c95 |    3.933913    1.292577      4.17    0.000      2.066061     7.490426
     ip79c96 |    3.503665    .9060642      4.85    0.000      2.110561     5.816307
     ip79c97 |    2.786094    .5990851      4.77    0.000      1.827951     4.246459
     ip79c98 |     2.51215    .5458831      4.24    0.000      1.640899     3.845999
     ip79c99 |    2.233748    .4882561      3.68    0.000      1.455383     3.428397
     ip80c80 |    .5160046    .1566445     -2.18    0.029      .2846117      .935523
     ip80c81 |    2.303071    .6504396      2.95    0.003      1.324063     4.005954
     ip80c82 |    4.030375    1.115044      5.04    0.000      2.343429     6.931688
     ip80c83 |    5.148385    1.361639      6.20    0.000      3.065816     8.645614
     ip80c84 |    4.920993    1.316995      5.95    0.000      2.912376      8.31492
     ip80c85 |    5.209606    1.366963      6.29    0.000      3.114984     8.712723
     ip80c86 |     4.99096       1.316      6.10    0.000      2.976747     8.368086
     ip80c87 |    4.746076    1.239147      5.96    0.000      2.845087      7.91724
     ip80c88 |    4.636753    1.244639      5.71    0.000      2.739849     7.846956
     ip80c89 |    4.514311    1.271349      5.35    0.000      2.599386     7.839931
     ip80c90 |    4.386039    1.219893      5.32    0.000      2.542887     7.565156
     ip80c91 |    4.410819    1.301658      5.03    0.000      2.473573      7.86527
     ip80c92 |    4.068273    1.177583      4.85    0.000      2.306882     7.174553
     ip80c93 |    3.972069    1.185839      4.62    0.000      2.212561     7.130801
     ip80c94 |    3.763627    1.129208      4.42    0.000       2.09035     6.776324
     ip80c95 |    3.733016    1.117135      4.40    0.000      2.076495     6.711025
     ip80c96 |    3.342473    .8057417      5.01    0.000      2.083896     5.361174
     ip80c97 |    2.736789    .5513049      5.00    0.000      1.844053     4.061713
     ip80c98 |    2.528001    .5034244      4.66    0.000      1.711077     3.734951
     ip80c99 |    2.184848    .4471472      3.82    0.000      1.462904     3.263072
     ip81c81 |    .4867772    .1348929     -2.60    0.009      .2827809     .8379349
     ip81c82 |    2.276236    .6373355      2.94    0.003      1.314876     3.940485
     ip81c83 |    4.239939     1.14607      5.34    0.000      2.496186     7.201819
     ip81c84 |    4.740544    1.261713      5.85    0.000      2.813701     7.986906
     ip81c85 |    5.337953    1.410836      6.34    0.000      3.179799     8.960861
     ip81c86 |    5.093181    1.367482      6.06    0.000      3.009177     8.620462
     ip81c87 |    4.999145    1.335798      6.02    0.000       2.96108     8.439977
     ip81c88 |     4.73363    1.299584      5.66    0.000      2.763777     8.107475
     ip81c89 |    4.542791    1.232991      5.58    0.000      2.668654     7.733095
     ip81c90 |    4.653422    1.280706      5.59    0.000      2.713353     7.980657
     ip81c91 |    4.343655    1.185922      5.38    0.000      2.543647     7.417437
     ip81c92 |    4.104415    1.144528      5.06    0.000      2.376245      7.08943
     ip81c93 |    3.961978    1.150738      4.74    0.000      2.242253     7.000669
     ip81c94 |    3.697846    1.025826      4.71    0.000      2.146918     6.369161
     ip81c95 |    3.718589    1.055732      4.63    0.000      2.131653     6.486939
     ip81c96 |    3.372324    .7759347      5.28    0.000      2.148212     5.293969
     ip81c97 |     2.73411    .5265986      5.22    0.000      1.874441     3.988046
     ip81c98 |    2.533255    .4837636      4.87    0.000      1.742324      3.68323
     ip81c99 |    2.135987    .4101081      3.95    0.000      1.466117     3.111923
     ip82c82 |    .5365961    .1665137     -2.01    0.045      .2920835     .9857981
     ip82c83 |    2.667961    .7400191      3.54    0.000        1.5491     4.594935
     ip82c84 |    4.478461    1.182304      5.68    0.000      2.669398     7.513532
     ip82c85 |    5.466999    1.487248      6.24    0.000      3.207651     9.317745
     ip82c86 |    5.432864    1.490934      6.17    0.000      3.172742     9.302998
     ip82c87 |    5.484749    1.516797      6.15    0.000      3.189765     9.430938
     ip82c88 |    5.572134    1.630874      5.87    0.000      3.139702      9.88905
     ip82c89 |    5.217134    1.508389      5.71    0.000      2.960266     9.194608
     ip82c90 |    5.372787    1.561127      5.79    0.000      3.039995     9.495687
     ip82c91 |    5.113364    1.584399      5.27    0.000      2.785852     9.385457
     ip82c92 |    4.976826    1.521437      5.25    0.000       2.73361     9.060839
     ip82c93 |    5.009595    1.569197      5.14    0.000      2.711276     9.256173
     ip82c94 |    4.722864    1.488374      4.93    0.000      2.546571     8.759011
     ip82c95 |    4.705114    1.538134      4.74    0.000      2.479171     8.929638
     ip82c96 |    4.367157    1.185838      5.43    0.000      2.564882     7.435843
     ip82c97 |    3.473394    .8086278      5.35    0.000      2.200843     5.481748
     ip82c98 |    3.218486    .7188454      5.23    0.000      2.077479     4.986164
     ip82c99 |    2.672577    .5835597      4.50    0.000      1.742086     4.100066
     ip83c83 |    .7884444    .2031342     -0.92    0.356       .475848     1.306393
     ip83c84 |    2.935479    .7298794      4.33    0.000      1.803166     4.778838
     ip83c85 |    5.019592    1.213754      6.67    0.000      3.124964     8.062909
     ip83c86 |    5.661648    1.372127      7.15    0.000      3.520871     9.104069
     ip83c87 |    5.689898    1.346324      7.35    0.000      3.578459     9.047173
     ip83c88 |    5.877378    1.385212      7.51    0.000      3.703121     9.328233
     ip83c89 |    5.542225    1.278331      7.42    0.000      3.526565     8.709965
     ip83c90 |    5.447201    1.277297      7.23    0.000      3.440153     8.625196
     ip83c91 |    5.208356    1.265514      6.79    0.000      3.235026     8.385396
     ip83c92 |    5.097923    1.212712      6.85    0.000      3.198206     8.126061
     ip83c93 |    4.961807    1.178461      6.74    0.000      3.115115     7.903249
     ip83c94 |    4.478981    1.069232      6.28    0.000      2.805295     7.151216
     ip83c95 |    4.635642    1.088241      6.53    0.000      2.926078     7.344022
     ip83c96 |    4.143733    .7893377      7.46    0.000      2.852638     6.019172
     ip83c97 |    3.381983     .541375      7.61    0.000      2.471237     4.628375
     ip83c98 |    3.023142    .5137202      6.51    0.000      2.166779     4.217961
     ip83c99 |    2.635241    .4846803      5.27    0.000      1.837659     3.778988
     ip84c84 |    .6935994    .2021418     -1.26    0.209       .391774     1.227953
     ip84c85 |    2.679075    .7166889      3.68    0.000      1.585904     4.525773
     ip84c86 |    4.586786    1.152929      6.06    0.000      2.802538     7.506984
     ip84c87 |    5.216419     1.32053      6.53    0.000      3.176083     8.567481
     ip84c88 |    5.159978    1.304874      6.49    0.000      3.143351     8.470378
     ip84c89 |    5.304217    1.354376      6.53    0.000      3.215702     8.749166
     ip84c90 |    5.297945    1.331227      6.64    0.000      3.237607     8.669436
     ip84c91 |    5.118588    1.311106      6.37    0.000      3.098263     8.456332
     ip84c92 |      4.9154    1.228446      6.37    0.000      3.011816     8.022122
     ip84c93 |    4.942993     1.29498      6.10    0.000      2.957943     8.260194
     ip84c94 |    4.660787     1.17634      6.10    0.000      2.841998     7.643544
     ip84c95 |    4.674584    1.187319      6.07    0.000      2.841465     7.690305
     ip84c96 |    4.293951    .9048003      6.92    0.000      2.841162     6.489603
     ip84c97 |    3.323461    .6249928      6.39    0.000       2.29889     4.804665
     ip84c98 |    3.216749    .5954796      6.31    0.000      2.237917     4.623706
     ip84c99 |    2.707443    .5350675      5.04    0.000      1.837967     3.988236
     ip85c85 |    .6583507    .1887391     -1.46    0.145      .3753451     1.154739
     ip85c86 |    2.932202    .7971151      3.96    0.000       1.72106     4.995648
     ip85c87 |    4.829145    1.231846      6.17    0.000      2.929144     7.961588
     ip85c88 |    5.638755    1.417805      6.88    0.000      3.444749     9.230151
     ip85c89 |    5.642474    1.426998      6.84    0.000      3.437149     9.262769
     ip85c90 |    6.183041    1.530003      7.36    0.000      3.806896      10.0423
     ip85c91 |    5.594121    1.439034      6.69    0.000      3.378846     9.261797
     ip85c92 |     5.52965      1.4093      6.71    0.000      3.355509     9.112486
     ip85c93 |    5.441622    1.372712      6.72    0.000      3.318967     8.921826
     ip85c94 |    5.196135    1.316582      6.50    0.000      3.162316     8.537988
     ip85c95 |    5.159941    1.237412      6.84    0.000      3.224905     8.256053
     ip85c96 |    4.770194    .9499321      7.85    0.000      3.228706     7.047637
     ip85c97 |    3.837885    .6797277      7.59    0.000      2.712287     5.430605
     ip85c98 |    3.667782    .6544645      7.28    0.000      2.585345     5.203417
     ip85c99 |    2.985984    .5592559      5.84    0.000      2.068535     4.310346
     ip76c00 |    1.521986    .2926985      2.18    0.029       1.04403     2.218749
     ip76c01 |    1.337535    .2459211      1.58    0.114      .9328286     1.917822
     ip76c02 |     .867366    .1693559     -0.73    0.466      .5915653     1.271751
     ip76c03 |    .7859376    .1699772     -1.11    0.265      .5143942     1.200826
     ip76c04 |    .7929673    .1557127     -1.18    0.237      .5396439     1.165208
     ip77c00 |    1.681942    .2700662      3.24    0.001      1.227821     2.304023
     ip77c01 |    1.499562    .2282786      2.66    0.008       1.11272     2.020892
     ip77c02 |    .9720503    .1065374     -0.26    0.796      .7841451     1.204983
     ip77c03 |    .9440559    .1139654     -0.48    0.633      .7451464     1.196062
     ip77c04 |    .8606677    .1051562     -1.23    0.219      .6773855     1.093541
     ip78c00 |    1.653857    .3114196      2.67    0.008      1.143451     2.392095
     ip78c01 |    1.432498    .2909889      1.77    0.077      .9620245     2.133054
     ip78c02 |    .9455176    .1284911     -0.41    0.680      .7244286     1.234081
     ip78c03 |    .8668917    .0799075     -1.55    0.121      .7236084     1.038547
     ip78c04 |    .7882162    .0888313     -2.11    0.035      .6319979     .9830488
     ip79c00 |    2.461023    .5309984      4.17    0.000      1.612344     3.756416
     ip79c01 |    2.146064    .4818158      3.40    0.001      1.382096     3.332323
     ip79c02 |    1.413891    .2246625      2.18    0.029      1.035531     1.930497
     ip79c03 |    1.225111    .1816219      1.37    0.171      .9161894     1.638194
     ip79c04 |    1.215655     .176314      1.35    0.178      .9148617     1.615346
     ip80c00 |    2.289732    .4627413      4.10    0.000      1.540855     3.402573
     ip80c01 |    1.894423    .3960042      3.06    0.002      1.257606     2.853707
     ip80c02 |    1.268055    .1621288      1.86    0.063      .9869758     1.629181
     ip80c03 |    1.123613    .1033881      1.27    0.205      .9381977     1.345672
     ip80c04 |    1.049305    .0993624      0.51    0.611      .8715623     1.263296
     ip81c00 |    2.218012    .4065375      4.35    0.000      1.548631     3.176727
     ip81c01 |    1.933487    .3413567      3.73    0.000      1.367923     2.732881
     ip81c02 |    1.267084    .1279249      2.34    0.019      1.039604     1.544339
     ip81c03 |    1.072477     .086511      0.87    0.386      .9156433     1.256175
     ip81c04 |     1.03366    .0874004      0.39    0.695      .8758001     1.219974
     ip82c00 |    2.962079    .6800204      4.73    0.000      1.888782     4.645277
     ip82c01 |    2.569994    .5988378      4.05    0.000      1.627768     4.057624
     ip82c02 |    1.652027    .2777011      2.99    0.003      1.188318     2.296686
     ip82c03 |    1.401091    .1635756      2.89    0.004      1.114524     1.761339
     ip82c04 |    1.337024    .1727483      2.25    0.025      1.037913     1.722335
     ip83c00 |    2.734113    .4036399      6.81    0.000      2.047164     3.651575
     ip83c01 |    2.315302    .3285566      5.92    0.000       1.75314     3.057728
     ip83c02 |    1.480437    .1305111      4.45    0.000       1.24552     1.759663
     ip83c03 |    1.236702     .105546      2.49    0.013      1.046211     1.461876
     ip83c04 |    1.215626    .1211802      1.96    0.050      .9998795     1.477925
     ip84c00 |    2.888693    .5021707      6.10    0.000      2.054605     4.061387
     ip84c01 |    2.449356    .3696886      5.94    0.000      1.822122     3.292504
     ip84c02 |    1.581038    .1473454      4.92    0.000      1.317086     1.897887
     ip84c03 |    1.322612    .1141128      3.24    0.001      1.116843     1.566292
     ip84c04 |    1.268733    .1065234      2.83    0.005      1.076224     1.495676
     ip85c00 |    3.250196    .5424756      7.06    0.000      2.343362     4.507957
     ip85c01 |    2.784311    .4324226      6.59    0.000      2.053621     3.774985
     ip85c02 |    1.796534    .1678645      6.27    0.000      1.495894     2.157595
     ip85c03 |    1.458842    .1316913      4.18    0.000      1.222276     1.741194
     ip85c04 |    1.436244    .1234972      4.21    0.000      1.213492     1.699886
       d1c95 |    2.780904    .8385895      3.39    0.001      1.539939     5.021902
       d1c00 |    1.627081    .1776238      4.46    0.000      1.313669     2.015266
       d2c95 |      5.0853    1.773429      4.66    0.000       2.56727     10.07306
       d2c00 |    3.505248    1.034171      4.25    0.000      1.966005     6.249611
       _cons |    9.270817     2.29285      9.00    0.000       5.70952     15.05346
-------------+----------------------------------------------------------------

.   * Column 2: Journal fixed effects, no age profile;
. xtpqml cit ip* d1c* d2c*, i(journal) irr fe cluster(journal);

Iteration 0:   log likelihood = -137709.07
Iteration 1:   log likelihood = -109477.31
Iteration 2:   log likelihood =  -107422.1
Iteration 3:   log likelihood = -107343.94
Iteration 4:   log likelihood = -107343.73
Iteration 5:   log likelihood = -107343.73

Conditional fixed-effects Poisson regression    Number of obs     =     18,441
Group variable: journal                         Number of groups  =         87

                                                Obs per group:
                                                              min =         21
                                                              avg =      212.0
                                                              max =        245

                                                Wald chi2(239)    =   48980.87
Log likelihood  = -107343.73                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip76c80 |     .252863     .022648     11.16    0.000      .2084736     .2972523
     ip76c81 |    .2817733    .0224039     12.58    0.000      .2378625     .3256842
     ip76c82 |    .2574837    .0226087     11.39    0.000      .2131714      .301796
     ip76c83 |    .2825229    .0223976     12.61    0.000      .2386244     .3264215
     ip76c84 |    .2388713    .0227678     10.49    0.000      .1942473     .2834953
     ip76c85 |     .225078    .0228868      9.83    0.000      .1802206     .2699354
     ip76c86 |    .1700182    .0233724      7.27    0.000      .1242091     .2158273
     ip76c87 |    .1166263    .0238593      4.89    0.000       .069863     .1633896
     ip76c88 |    .0288507     .024695      1.17    0.243     -.0195506     .0772519
     ip76c89 |   -.0030382    .0250097     -0.12    0.903     -.0520564     .0459799
     ip76c90 |    .0437083    .0245503      1.78    0.075     -.0044095     .0918261
     ip76c91 |   -.0695062    .0256855     -2.71    0.007     -.1198489    -.0191634
     ip76c92 |   -.1378523     .026409     -5.22    0.000     -.1896129    -.0860917
     ip76c93 |   -.1703189     .026763     -6.36    0.000     -.2227734    -.1178645
     ip76c94 |     -.25642    .0277352     -9.25    0.000     -.3107801      -.20206
     ip76c95 |   -.2118287    .0272256     -7.78    0.000     -.2651898    -.1584675
     ip76c96 |   -.1809577    .0270857     -6.68    0.000     -.2340447    -.1278708
     ip76c97 |   -.3203855    .0283945    -11.28    0.000     -.3760376    -.2647333
     ip76c98 |   -.2677187    .0277823     -9.64    0.000      -.322171    -.2132664
     ip76c99 |   -.2894245    .0280624    -10.31    0.000     -.3444257    -.2344233
     ip77c80 |    .2593483    .0224411     11.56    0.000      .2153645      .303332
     ip77c81 |    .3053715    .0220602     13.84    0.000      .2621342     .3486088
     ip77c82 |    .2739361    .0223192     12.27    0.000      .2301914     .3176809
     ip77c83 |    .3068098    .0220485     13.92    0.000      .2635955     .3500241
     ip77c84 |    .3096803    .0220251     14.06    0.000      .2665118     .3528488
     ip77c85 |    .2966978    .0221312     13.41    0.000      .2533215     .3400741
     ip77c86 |    .2464546    .0225498     10.93    0.000      .2022579     .2906514
     ip77c87 |    .2035631    .0229177      8.88    0.000      .1586453     .2484809
     ip77c88 |    .1274304    .0235952      5.40    0.000      .0811846     .1736762
     ip77c89 |    .1039408    .0238108      4.37    0.000      .0572725     .1506091
     ip77c90 |    .0557007    .0242633      2.30    0.022      .0081455     .1032558
     ip77c91 |   -.0037699    .0248397     -0.15    0.879     -.0524547      .044915
     ip77c92 |   -.0849161    .0256602     -3.31    0.001     -.1352092    -.0346231
     ip77c93 |   -.1058677    .0258786     -4.09    0.000     -.1565888    -.0551467
     ip77c94 |   -.1508378    .0263566     -5.72    0.000     -.2024959    -.0991798
     ip77c95 |   -.1588196    .0264428     -6.01    0.000     -.2106466    -.1069927
     ip77c96 |   -.1264404    .0262963     -4.81    0.000     -.1779803    -.0749006
     ip77c97 |   -.1925798     .026732     -7.20    0.000     -.2449736     -.140186
     ip77c98 |   -.2509888    .0273873     -9.16    0.000     -.3046669    -.1973108
     ip77c99 |   -.2383594    .0272726     -8.74    0.000     -.2918127    -.1849062
     ip78c80 |    .1200949    .0236622      5.08    0.000      .0737178     .1664719
     ip78c81 |    .3064504    .0220514     13.90    0.000      .2632304     .3496705
     ip78c82 |    .2787519    .0222792     12.51    0.000      .2350855     .3224182
     ip78c83 |    .3524638    .0216818     16.26    0.000      .3099682     .3949594
     ip78c84 |    .3424585    .0217613     15.74    0.000      .2998072     .3851099
     ip78c85 |    .3441907    .0217475     15.83    0.000      .3015665      .386815
     ip78c86 |    .2794907    .0222731     12.55    0.000      .2358363     .3231451
     ip78c87 |    .2244588    .0227372      9.87    0.000      .1798947     .2690229
     ip78c88 |    .1927478     .023012      8.38    0.000      .1476452     .2378505
     ip78c89 |    .1235536    .0236306      5.23    0.000      .0772384     .1698687
     ip78c90 |    .1087707    .0237662      4.58    0.000      .0621898     .1553516
     ip78c91 |    .0365814    .0244463      1.50    0.135     -.0113325     .0844953
     ip78c92 |   -.0260756    .0250612     -1.04    0.298     -.0751948     .0230435
     ip78c93 |   -.0717129    .0255239     -2.81    0.005     -.1217389    -.0216869
     ip78c94 |   -.1113114    .0259358     -4.29    0.000     -.1621446    -.0604782
     ip78c95 |   -.1211853      .02604     -4.65    0.000     -.1722227    -.0701479
     ip78c96 |   -.0984397    .0260024     -3.79    0.000     -.1494034     -.047476
     ip78c97 |   -.2222556    .0270595     -8.21    0.000     -.2752912      -.16922
     ip78c98 |   -.1763496    .0265607     -6.64    0.000     -.2284077    -.1242915
     ip78c99 |    -.258762    .0275029     -9.41    0.000     -.3126666    -.2048574
     ip79c80 |   -.3335002    .0284337    -11.73    0.000     -.3892292    -.2777711
     ip79c81 |    .1682868    .0232277      7.25    0.000      .1227614     .2138121
     ip79c82 |      .36982    .0215452     17.16    0.000      .3275923     .4120478
     ip79c83 |    .4426741    .0209878     21.09    0.000      .4015387     .4838095
     ip79c84 |    .4351174    .0210444     20.68    0.000       .393871     .4763637
     ip79c85 |    .4470559    .0209551     21.33    0.000      .4059846     .4881272
     ip79c86 |    .4104801    .0212309     19.33    0.000      .3688682     .4520919
     ip79c87 |    .3828921    .0214432     17.86    0.000      .3408641     .4249201
     ip79c88 |     .346956    .0217255     15.97    0.000      .3043748     .3895372
     ip79c89 |    .3089634     .022031     14.02    0.000      .2657835     .3521434
     ip79c90 |    .3207262    .0219356     14.62    0.000      .2777332     .3637192
     ip79c91 |     .254438    .0224824     11.32    0.000      .2103733     .2985026
     ip79c92 |    .2244588    .0227372      9.87    0.000      .1798947     .2690229
     ip79c93 |    .2003707    .0229454      8.73    0.000      .1553985      .245343
     ip79c94 |    .1826283    .0231008      7.91    0.000      .1373516     .2279051
     ip79c95 |    .1915389    .0230226      8.32    0.000      .1464155     .2366623
     ip79c96 |     .203488    .0231306      8.80    0.000      .1581529     .2488231
     ip79c97 |    .1167951     .023643      4.94    0.000      .0704557     .1631345
     ip79c98 |    .0946521    .0238514      3.97    0.000      .0479043     .1413999
     ip79c99 |    .1267256    .0235925      5.37    0.000      .0804851      .172966
     ip80c80 |   -1.815642    .0543252    -33.42    0.000     -1.922118    -1.709167
     ip80c81 |   -.3197592     .027555    -11.60    0.000     -.3737661    -.2657524
     ip80c82 |    .2398565    .0220914     10.86    0.000      .1965582     .2831549
     ip80c83 |    .4846802    .0202359     23.95    0.000      .4450185     .5243419
     ip80c84 |    .4395075    .0205566     21.38    0.000      .3992172     .4797978
     ip80c85 |    .4965013    .0201535     24.64    0.000      .4570011     .5360016
     ip80c86 |    .4536254    .0204554     22.18    0.000      .4135335     .4937172
     ip80c87 |    .4033154    .0208205     19.37    0.000       .362508     .4441227
     ip80c88 |    .3800115    .0209937     18.10    0.000      .3388647     .4211583
     ip80c89 |    .3532498    .0211958     16.67    0.000      .3117069     .3947927
     ip80c90 |    .3244237    .0214174     15.15    0.000      .2824465      .366401
     ip80c91 |    .3300575    .0213737     15.44    0.000      .2881658     .3719493
     ip80c92 |    .2492159     .022015     11.32    0.000      .2060672     .2923645
     ip80c93 |    .2252843    .0222112     10.14    0.000      .1817511     .2688176
     ip80c94 |    .1713802    .0226641      7.56    0.000      .1269593     .2158011
     ip80c95 |    .1632137    .0227341      7.18    0.000      .1186557     .2077717
     ip80c96 |    .1707725    .0228586      7.47    0.000      .1259704     .2155746
     ip80c97 |    .1035908    .0232076      4.46    0.000      .0581047      .149077
     ip80c98 |    .1007082    .0232384      4.33    0.000      .0551618     .1462547
     ip80c99 |    .0963032    .0233067      4.13    0.000       .050623     .1419834
     ip81c81 |   -1.832805    .0544716    -33.65    0.000     -1.939567    -1.726043
     ip81c82 |   -.2903328    .0270883    -10.72    0.000     -.3434248    -.2372407
     ip81c83 |    .3316929    .0212697     15.59    0.000      .2900051     .3733807
     ip81c84 |    .4432961     .020444     21.68    0.000      .4032266     .4833656
     ip81c85 |    .5619863    .0196293     28.63    0.000      .5235136      .600459
     ip81c86 |    .5150468    .0199439     25.82    0.000      .4759574     .5541361
     ip81c87 |     .496411    .0200716     24.73    0.000      .4570715     .5357505
     ip81c88 |    .4418365    .0204544     21.60    0.000      .4017466     .4819264
     ip81c89 |    .4006858    .0207523     19.31    0.000      .3600121     .4413594
     ip81c90 |    .4247471    .0205771     20.64    0.000      .3844166     .4650775
     ip81c91 |    .3558603    .0210858     16.88    0.000      .3145329     .3971878
     ip81c92 |    .2992075    .0215214     13.90    0.000      .2570263     .3413886
     ip81c93 |    .2638875     .021801     12.10    0.000      .2211584     .3066166
     ip81c94 |    .1948946    .0223655      8.71    0.000      .1510591     .2387301
     ip81c95 |    .2004885    .0223188      8.98    0.000      .1567445     .2442325
     ip81c96 |    .2152365    .0223833      9.62    0.000      .1713659      .259107
     ip81c97 |    .1319825    .0228567      5.77    0.000      .0871842     .1767808
     ip81c98 |    .1292122    .0228858      5.65    0.000      .0843568     .1740675
     ip81c99 |    .0952027    .0232109      4.10    0.000      .0497103     .1406952
     ip82c82 |   -1.728917     .051679    -33.45    0.000     -1.830206    -1.627628
     ip82c83 |   -.1250925    .0252579     -4.95    0.000     -.1745971     -.075588
     ip82c84 |    .3928723    .0207622     18.92    0.000      .3521792     .4335655
     ip82c85 |    .5923228    .0193892     30.55    0.000      .5543207     .6303249
     ip82c86 |    .5860595    .0194296     30.16    0.000      .5479781     .6241408
     ip82c87 |    .5955643    .0193683     30.75    0.000       .557603     .6335255
     ip82c88 |     .611371    .0192673     31.73    0.000      .5736078     .6491342
     ip82c89 |    .5455411    .0196952     27.70    0.000      .5069391      .584143
     ip82c90 |    .5749398    .0195018     29.48    0.000       .536717     .6131626
     ip82c91 |    .5254505    .0198296     26.50    0.000      .4865852     .5643158
     ip82c92 |    .4983853    .0200135     24.90    0.000      .4591596      .537611
     ip82c93 |    .5049481    .0199686     25.29    0.000      .4658104     .5440858
     ip82c94 |    .4460085    .0203787     21.89    0.000      .4060669       .48595
     ip82c95 |    .4422431    .0204054     21.67    0.000      .4022491      .482237
     ip82c96 |      .47887    .0203419     23.54    0.000      .4390005     .5187394
     ip82c97 |    .3750204    .0208681     17.97    0.000      .3341196     .4159211
     ip82c98 |    .3716288    .0208988     17.78    0.000       .330668     .4125896
     ip82c99 |    .3211537    .0213079     15.07    0.000      .2793909     .3629165
     ip83c83 |   -1.351559    .0418892    -32.27    0.000      -1.43366    -1.269458
     ip83c84 |   -.0369952    .0237379     -1.56    0.119     -.0835206     .0095303
     ip83c85 |    .4994829    .0195413     25.56    0.000      .4611826     .5377831
     ip83c86 |    .6198492    .0187843     33.00    0.000      .5830326     .6566658
     ip83c87 |    .6248266    .0187543     33.32    0.000      .5880688     .6615844
     ip83c88 |     .657245    .0185614     35.41    0.000      .6208653     .6936247
     ip83c89 |    .5985303     .018914     31.64    0.000      .5614596      .635601
     ip83c90 |    .5812361    .0190205     30.56    0.000      .5439566     .6185157
     ip83c91 |    .5363985    .0193026     27.79    0.000      .4985661     .5742309
     ip83c92 |    .5149674    .0194405     26.49    0.000      .4768648       .55307
     ip83c93 |    .4879042    .0196174     24.87    0.000      .4494548     .5263535
     ip83c94 |    .3855298     .020316     18.98    0.000      .3457112     .4253484
     ip83c95 |     .419909    .0200761     20.92    0.000      .3805606     .4592575
     ip83c96 |    .4125575    .0202956     20.33    0.000      .3727789     .4523361
     ip83c97 |    .3285007    .0206973     15.87    0.000      .2879348     .3690667
     ip83c98 |    .2858529    .0210157     13.60    0.000      .2446629     .3270429
     ip83c99 |    .2783546    .0210986     13.19    0.000      .2370021     .3197071
     ip84c84 |   -1.462074    .0439816    -33.24    0.000     -1.548277    -1.375872
     ip84c85 |   -.1107422    .0243767     -4.54    0.000     -.1585197    -.0629647
     ip84c86 |     .426966    .0199877     21.36    0.000      .3877908     .4661412
     ip84c87 |    .5555976    .0191443     29.02    0.000      .5180755     .5931196
     ip84c88 |    .5447187    .0192128     28.35    0.000      .5070622     .5823751
     ip84c89 |    .5722885      .01904     30.06    0.000      .5349707     .6096062
     ip84c90 |    .5711054    .0190474     29.98    0.000      .5337733     .6084376
     ip84c91 |    .5366649    .0192639     27.86    0.000      .4989084     .5744215
     ip84c92 |    .4961594     .019525     25.41    0.000       .457891     .5344278
     ip84c93 |    .5017574    .0194885     25.75    0.000      .4635606     .5399542
     ip84c94 |    .4429707    .0198788     22.28    0.000       .404009     .4819325
     ip84c95 |    .4459265    .0198588     22.45    0.000      .4070039     .4848491
     ip84c96 |    .4635645    .0199087     23.28    0.000      .4245443     .5025848
     ip84c97 |    .3238851    .0206882     15.66    0.000      .2833369     .3644332
     ip84c98 |    .3595249    .0204376     17.59    0.000      .3194679     .3995819
     ip84c99 |     .314876    .0207854     15.15    0.000      .2741374     .3556146
     ip85c85 |   -1.513766    .0448226    -33.77    0.000     -1.601617    -1.425915
     ip85c86 |   -.0199948    .0234235     -0.85    0.393     -.0659039     .0259143
     ip85c87 |    .4789208    .0195593     24.49    0.000      .4405854     .5172563
     ip85c88 |    .6339147    .0185931     34.09    0.000       .597473     .6703565
     ip85c89 |    .6345742    .0185892     34.14    0.000        .59814     .6710083
     ip85c90 |    .7260617    .0180651     40.19    0.000      .6906548     .7614686
     ip85c91 |    .6259677    .0186402     33.58    0.000      .5894336     .6625018
     ip85c92 |    .6143759    .0187094     32.84    0.000      .5777062     .6510456
     ip85c93 |    .5983286    .0188061     31.82    0.000      .5614694     .6351878
     ip85c94 |    .5521665    .0190901     28.92    0.000      .5147506     .5895824
     ip85c95 |    .5654567    .0190072     29.75    0.000      .5282032     .6027101
     ip85c96 |    .5865014    .0190483     30.79    0.000      .5491675     .6238353
     ip85c97 |    .4822119    .0195193     24.70    0.000      .4439547      .520469
     ip85c98 |    .5034982    .0193872     25.97    0.000      .4654999     .5414965
     ip85c99 |    .4227409    .0199457     21.19    0.000      .3836481     .4618337
     ip76c00 |   -.3599849      .02766    -13.01    0.000     -.4141976    -.3057723
     ip76c01 |   -.3428238    .0271983    -12.60    0.000     -.3961315    -.2895161
     ip76c02 |    -.414466    .0277052    -14.96    0.000     -.4687672    -.3601648
     ip76c03 |   -.3449901    .0267023    -12.92    0.000     -.3973257    -.2926545
     ip76c04 |   -.3183397    .0263648    -12.07    0.000     -.3700138    -.2666657
     ip77c00 |   -.2577381    .0262154     -9.83    0.000     -.3091194    -.2063568
     ip77c01 |   -.2287616    .0256204     -8.93    0.000     -.2789766    -.1785466
     ip77c02 |   -.2919743    .0259477    -11.25    0.000      -.342831    -.2411177
     ip77c03 |   -.1571043    .0242687     -6.47    0.000       -.20467    -.1095385
     ip77c04 |   -.2322153    .0251231     -9.24    0.000     -.2814558    -.1829749
     ip78c00 |   -.2745767    .0264149    -10.39    0.000      -.326349    -.2228043
     ip78c01 |   -.2745152    .0261595    -10.49    0.000     -.3257869    -.2232436
     ip78c02 |   -.3302816    .0264165    -12.50    0.000     -.3820571    -.2785062
     ip78c03 |   -.2513431     .025355     -9.91    0.000     -.3010379    -.2016483
     ip78c04 |   -.3289596    .0262846    -12.52    0.000     -.3804764    -.2774427
     ip79c00 |    .1228901    .0221692      5.54    0.000      .0794393     .1663409
     ip79c01 |    .1297007     .021835      5.94    0.000      .0869049     .1724964
     ip79c02 |    .0827191    .0218486      3.79    0.000      .0398967     .1255415
     ip79c03 |    .1034968    .0215379      4.81    0.000      .0612833     .1457104
     ip79c04 |    .1131146    .0214383      5.28    0.000      .0710963      .155133
     ip80c00 |    .0531927    .0222935      2.39    0.017      .0094983     .0968872
     ip80c01 |     .008834    .0224605      0.39    0.694     -.0351878     .0528559
     ip80c02 |   -.0092932    .0221948     -0.42    0.675     -.0527942     .0342079
     ip80c03 |    .0624335    .0213412      2.93    0.003      .0206055     .1042614
     ip80c04 |    .0096212    .0218537      0.44    0.660     -.0332113     .0524537
     ip81c00 |    .0405081    .0223399      1.81    0.070     -.0032772     .0842935
     ip81c01 |    .0442578    .0220079      2.01    0.044      .0011231     .0873925
     ip81c02 |    .0061521    .0219302      0.28    0.779     -.0368303     .0491344
     ip81c03 |    .0529478    .0213266      2.48    0.013      .0111484     .0947473
     ip81c04 |    .0383732    .0214612      1.79    0.074     -.0036899     .0804363
     ip82c00 |    .3375453    .0196565     17.17    0.000      .2990192     .3760713
     ip82c01 |    .3346934    .0193904     17.26    0.000      .2966888     .3726979
     ip82c02 |    .2795402    .0193815     14.42    0.000      .2415532     .3175271
     ip82c03 |    .3329055    .0187701     17.74    0.000      .2961168     .3696942
     ip82c04 |    .3055111    .0189925     16.09    0.000      .2682866     .3427357
     ip83c00 |    .2324099    .0200285     11.60    0.000      .1931547     .2716651
     ip83c01 |    .2079351    .0199244     10.44    0.000       .168884     .2469862
     ip83c02 |    .1529719    .0198717      7.70    0.000      .1140241     .1919197
     ip83c03 |    .1954749    .0193488     10.10    0.000      .1575518     .2333979
     ip83c04 |    .1989755    .0193143     10.30    0.000      .1611203     .2368308
     ip84c00 |    .2983175    .0194794     15.31    0.000      .2601385     .3364965
     ip84c01 |    .2900614    .0192043     15.10    0.000      .2524217     .3277012
     ip84c02 |    .2370158    .0191077     12.40    0.000      .1995653     .2744662
     ip84c03 |    .2761286    .0186284     14.82    0.000      .2396177     .3126396
     ip84c04 |    .2548311    .0187984     13.56    0.000      .2179868     .2916753
     ip85c00 |    .4185265     .018498     22.63    0.000       .382271     .4547819
     ip85c01 |    .4185517    .0181472     23.06    0.000      .3829839     .4541196
     ip85c02 |    .3700962    .0179619     20.60    0.000      .3348916     .4053009
     ip85c03 |    .3763119    .0177559     21.19    0.000      .3415111     .4111128
     ip85c04 |    .3807338    .0177177     21.49    0.000      .3460077     .4154599
       d1c95 |   -.0155928    .0112657     -1.38    0.166     -.0376733     .0064876
       d1c00 |    .0221149    .0117057      1.89    0.059     -.0008279     .0450577
       d2c95 |    .0404469    .0084296      4.80    0.000      .0239253     .0569686
       d2c00 |    .0495843    .0092744      5.35    0.000      .0314069     .0677618
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     ip76c80 |    1.287707    .1150715      2.83    0.005      1.080817     1.534199
     ip76c81 |    1.325478    .1225132      3.05    0.002      1.105851     1.588725
     ip76c82 |    1.293671    .1196573      2.78    0.005      1.079176     1.550798
     ip76c83 |    1.326472    .1175989      3.19    0.001      1.114896     1.578199
     ip76c84 |    1.269815    .1078716      2.81    0.005      1.075054      1.49986
     ip76c85 |     1.25242    .1136047      2.48    0.013      1.048429     1.496101
     ip76c86 |    1.185326    .1037757      1.94    0.052      .9984239     1.407217
     ip76c87 |    1.123699    .1034274      1.27    0.205      .9382185     1.345849
     ip76c88 |    1.029271    .0954643      0.31    0.756      .8581856     1.234463
     ip76c89 |    .9969664    .0927262     -0.03    0.974       .830829     1.196325
     ip76c90 |    1.044678    .1124716      0.41    0.685      .8459421     1.290102
     ip76c91 |    .9328544    .0930065     -0.70    0.486        .76727     1.134174
     ip76c92 |    .8712273    .1020042     -1.18    0.239      .6925832     1.095951
     ip76c93 |    .8433958    .0901772     -1.59    0.111      .6839426     1.040024
     ip76c94 |    .7738169    .0872837     -2.27    0.023      .6203343      .965274
     ip76c95 |    .8091033    .0988063     -1.73    0.083      .6368787     1.027901
     ip76c96 |    .8344706    .1026989     -1.47    0.141      .6556213     1.062109
     ip76c97 |    .7258692    .0972783     -2.39    0.017      .5581918     .9439159
     ip76c98 |     .765123    .1045442     -1.96    0.050      .5853634     1.000085
     ip76c99 |    .7486943    .1145135     -1.89    0.058      .5547693     1.010408
     ip77c80 |    1.296085    .1059362      3.17    0.002      1.104231     1.521272
     ip77c81 |    1.357129    .0920657      4.50    0.000      1.188165      1.55012
     ip77c82 |    1.315131    .0922635      3.90    0.000      1.146179     1.508986
     ip77c83 |    1.359082     .090735      4.60    0.000      1.192389     1.549079
     ip77c84 |    1.362989    .0866398      4.87    0.000      1.203331     1.543832
     ip77c85 |    1.345409    .0882936      4.52    0.000      1.183023     1.530083
     ip77c86 |    1.279481    .0837024      3.77    0.000      1.125509     1.454516
     ip77c87 |    1.225762    .0854917      2.92    0.004       1.06915     1.405316
     ip77c88 |    1.135906    .0857199      1.69    0.091       .979732     1.316974
     ip77c89 |    1.109535    .0787133      1.47    0.143      .9655049     1.275051
     ip77c90 |    1.057281    .0773324      0.76    0.446      .9160756     1.220252
     ip77c91 |    .9962372    .0695066     -0.05    0.957      .8689107     1.142222
     ip77c92 |    .9185893    .0674339     -1.16    0.247      .7954895     1.060738
     ip77c93 |    .8995436    .0643031     -1.48    0.139      .7819425     1.034831
     ip77c94 |    .8599871    .0540469     -2.40    0.016      .7603214     .9727174
     ip77c95 |    .8531502    .0638135     -2.12    0.034      .7368138     .9878551
     ip77c96 |    .8812266    .0704741     -1.58    0.114      .7533812     1.030767
     ip77c97 |    .8248285    .0711832     -2.23    0.026      .6964733     .9768387
     ip77c98 |    .7780311    .0705675     -2.77    0.006      .6513177     .9293964
     ip77c99 |    .7879194    .0697049     -2.69    0.007      .6624889     .9370981
     ip78c80 |    1.127604    .0945208      1.43    0.152      .9567644     1.328948
     ip78c81 |    1.358594    .1122425      3.71    0.000       1.15549     1.597398
     ip78c82 |    1.321479    .1126463      3.27    0.001      1.118154     1.561777
     ip78c83 |    1.422568     .106895      4.69    0.000      1.227755     1.648293
     ip78c84 |    1.408406    .1050442      4.59    0.000      1.216864     1.630098
     ip78c85 |    1.410848    .1246411      3.90    0.000      1.186536     1.677565
     ip78c86 |    1.322456    .1067107      3.46    0.001      1.129007     1.549051
     ip78c87 |    1.251645    .0998474      2.81    0.005      1.070479     1.463471
     ip78c88 |    1.212577     .104698      2.23    0.026      1.023797     1.436167
     ip78c89 |    1.131511     .102226      1.37    0.171      .9478881     1.350704
     ip78c90 |    1.114907     .103171      1.18    0.240      .9299727     1.336616
     ip78c91 |    1.037259    .1164392      0.33    0.745      .8324038     1.292529
     ip78c92 |    .9742614    .1024418     -0.25    0.804      .7928175      1.19723
     ip78c93 |    .9307981    .0889224     -0.75    0.453      .7718577     1.122467
     ip78c94 |    .8946601    .0980998     -1.02    0.310      .7216448     1.109156
     ip78c95 |    .8858698    .0876915     -1.22    0.221      .7296425     1.075548
     ip78c96 |    .9062503    .1033778     -0.86    0.388       .724686     1.133304
     ip78c97 |    .8007107    .0804617     -2.21    0.027      .6575674     .9750144
     ip78c98 |    .8383248    .0829622     -1.78    0.075      .6905193     1.017768
     ip78c99 |    .7720067     .075667     -2.64    0.008       .637077     .9355138
     ip79c80 |    .7164118    .0677672     -3.53    0.000      .5951761     .8623429
     ip79c81 |    1.183276    .1050166      1.90    0.058      .9943545     1.408091
     ip79c82 |    1.447474    .1110608      4.82    0.000      1.245376     1.682369
     ip79c83 |    1.556865     .108678      6.34    0.000      1.357789     1.785129
     ip79c84 |    1.545144    .0980833      6.85    0.000      1.364383     1.749855
     ip79c85 |    1.563702    .1173833      5.96    0.000      1.349759     1.811555
     ip79c86 |    1.507541       .1138      5.44    0.000      1.300213      1.74793
     ip79c87 |     1.46652    .1268537      4.43    0.000      1.237825     1.737468
     ip79c88 |    1.414755    .1097876      4.47    0.000       1.21514     1.647161
     ip79c89 |    1.362013    .1187853      3.54    0.000      1.148009     1.615909
     ip79c90 |    1.378128    .1246951      3.54    0.000      1.154175     1.645537
     ip79c91 |    1.289737    .1365189      2.40    0.016      1.048096     1.587088
     ip79c92 |    1.251645     .146945      1.91    0.056      .9943719     1.575482
     ip79c93 |    1.221856    .1403952      1.74    0.081      .9754703     1.530473
     ip79c94 |    1.200368    .1468985      1.49    0.136      .9443788     1.525748
     ip79c95 |    1.211112    .1591955      1.46    0.145      .9360466     1.567008
     ip79c96 |     1.22567    .1504691      1.66    0.097      .9635543      1.55909
     ip79c97 |    1.123889    .1335224      0.98    0.326      .8904251     1.418566
     ip79c98 |    1.099276    .1480103      0.70    0.482      .8443028      1.43125
     ip79c99 |    1.135105     .146884      0.98    0.327      .8808252     1.462792
     ip80c80 |    .1627333    .0213502    -13.84    0.000      .1258349     .2104514
     ip80c81 |    .7263239    .0735955     -3.16    0.002      .5954996     .8858888
     ip80c82 |    1.271067    .1133647      2.69    0.007      1.067213      1.51386
     ip80c83 |    1.623656    .1220992      6.45    0.000      1.401146     1.881501
     ip80c84 |    1.551943     .109425      6.23    0.000      1.351633     1.781938
     ip80c85 |    1.642963    .1259727      6.48    0.000      1.413718     1.909382
     ip80c86 |    1.574008    .1217121      5.87    0.000      1.352654     1.831585
     ip80c87 |    1.496779    .1072297      5.63    0.000        1.3007     1.722416
     ip80c88 |    1.462301    .1037463      5.36    0.000      1.272467     1.680457
     ip80c89 |    1.423687    .1076413      4.67    0.000      1.227601     1.651093
     ip80c90 |    1.383233    .1104702      4.06    0.000      1.182811     1.617617
     ip80c91 |    1.391048    .1283226      3.58    0.000      1.160967     1.666727
     ip80c92 |    1.283019    .1140646      2.80    0.005       1.07785     1.527241
     ip80c93 |    1.252679    .1186332      2.38    0.017      1.040466     1.508174
     ip80c94 |    1.186942    .1163965      1.75    0.081      .9793933     1.438473
     ip80c95 |    1.177288    .1147102      1.68    0.094      .9726245     1.425018
     ip80c96 |    1.186221    .1111894      1.82    0.068      .9871403     1.425451
     ip80c97 |    1.109147    .1071521      1.07    0.284      .9178175      1.34036
     ip80c98 |    1.105954     .107436      1.04    0.300      .9142153     1.337906
     ip80c99 |    1.101093     .117148      0.91    0.365      .8938457     1.356392
     ip81c81 |    .1599642    .0180652    -16.23    0.000      .1282019     .1995958
     ip81c82 |    .7480146    .0704562     -3.08    0.002      .6219201     .8996749
     ip81c83 |    1.393325    .1104197      4.19    0.000      1.192877     1.627456
     ip81c84 |    1.557834      .12207      5.66    0.000      1.336048     1.816436
     ip81c85 |    1.754153     .140873      7.00    0.000       1.49868     2.053175
     ip81c86 |    1.673717    .1229818      7.01    0.000       1.44923     1.932977
     ip81c87 |    1.642815    .1140415      7.15    0.000      1.433836     1.882251
     ip81c88 |    1.555561    .1119889      6.14    0.000      1.350849     1.791296
     ip81c89 |    1.492848    .1015014      5.89    0.000      1.306595     1.705652
     ip81c90 |    1.529204    .1059979      6.13    0.000      1.334946     1.751729
     ip81c91 |    1.427408    .0972673      5.22    0.000       1.24895     1.631366
     ip81c92 |    1.348789    .0865421      4.66    0.000      1.189402     1.529536
     ip81c93 |    1.301982    .1008385      3.41    0.001      1.118612     1.515411
     ip81c94 |    1.215183    .0822208      2.88    0.004      1.064261     1.387506
     ip81c95 |       1.222    .0899958      2.72    0.006       1.05775     1.411754
     ip81c96 |    1.240155    .0921666      2.90    0.004      1.072052     1.434618
     ip81c97 |    1.141088    .0825973      1.82    0.068        .99016     1.315023
     ip81c98 |    1.137932    .0800492      1.84    0.066      .9913735     1.306156
     ip81c99 |    1.099882     .072433      1.45    0.148      .9666961     1.251417
     ip82c82 |    .1774766    .0233201    -13.16    0.000      .1371813     .2296081
     ip82c83 |    .8824153    .0784566     -1.41    0.159      .7412959     1.050399
     ip82c84 |    1.481229    .1187102      4.90    0.000      1.265915     1.733166
     ip82c85 |    1.808184    .1636784      6.54    0.000      1.514227     2.159206
     ip82c86 |    1.796894    .1524661      6.91    0.000      1.521592     2.122006
     ip82c87 |    1.814054    .1639409      6.59    0.000      1.519585     2.165587
     ip82c88 |    1.842956    .1968124      5.72    0.000      1.494906     2.272042
     ip82c89 |    1.725542    .1753555      5.37    0.000      1.413915      2.10585
     ip82c90 |    1.777024    .1847528      5.53    0.000      1.449425     2.178665
     ip82c91 |    1.691221    .2059879      4.31    0.000      1.332065     2.147213
     ip82c92 |    1.646061    .1997459      4.11    0.000      1.297641     2.088033
     ip82c93 |    1.656899    .2047731      4.09    0.000      1.300462     2.111031
     ip82c94 |    1.562065    .2105399      3.31    0.001       1.19942     2.034354
     ip82c95 |    1.556194    .2230913      3.08    0.002         1.175     2.061054
     ip82c96 |    1.614249    .2180371      3.55    0.000      1.238792     2.103501
     ip82c97 |    1.455021    .2018598      2.70    0.007      1.108611     1.909674
     ip82c98 |    1.450095    .1937635      2.78    0.005      1.115983     1.884235
     ip82c99 |    1.378717    .1824661      2.43    0.015       1.06371     1.787012
     ip83c83 |    .2588364    .0374581     -9.34    0.000      .1949135     .3437232
     ip83c84 |    .9636808    .0788302     -0.45    0.651      .8209259      1.13126
     ip83c85 |    1.647869    .1371192      6.00    0.000      1.399891     1.939774
     ip83c86 |    1.858648    .1446685      7.96    0.000      1.595672     2.164964
     ip83c87 |    1.867922    .1423844      8.20    0.000        1.6087     2.168915
     ip83c88 |    1.929469    .1445592      8.77    0.000      1.665959      2.23466
     ip83c89 |    1.819443    .1379611      7.89    0.000      1.568177     2.110968
     ip83c90 |    1.788248    .1269293      8.19    0.000         1.556      2.05516
     ip83c91 |    1.709838    .1172251      7.82    0.000      1.494849     1.955747
     ip83c92 |    1.673584    .1097333      7.85    0.000      1.471757     1.903088
     ip83c93 |    1.628899    .1030566      7.71    0.000      1.438933     1.843943
     ip83c94 |    1.470393    .0923572      6.14    0.000      1.300075     1.663024
     ip83c95 |    1.521823    .0996949      6.41    0.000      1.338449      1.73032
     ip83c96 |    1.510676    .0989023      6.30    0.000      1.328753     1.717507
     ip83c97 |    1.388884    .0998121      4.57    0.000      1.206409      1.59896
     ip83c98 |    1.330897     .091543      4.16    0.000      1.163044     1.522974
     ip83c99 |    1.320954    .0929485      3.96    0.000      1.150783      1.51629
     ip84c84 |     .231755    .0301798    -11.23    0.000      .1795491     .2991404
     ip84c85 |    .8951695    .0822077     -1.21    0.228      .7477138     1.071705
     ip84c86 |    1.532601    .1357928      4.82    0.000      1.288279     1.823257
     ip84c87 |    1.742982    .1425626      6.79    0.000      1.484811     2.046043
     ip84c88 |    1.724123    .1335468      7.03    0.000      1.481277     2.006783
     ip84c89 |    1.772318    .1387281      7.31    0.000      1.520246     2.066186
     ip84c90 |    1.770223     .141687      7.14    0.000      1.513208     2.070891
     ip84c91 |    1.710293    .1312827      6.99    0.000      1.471405     1.987967
     ip84c92 |    1.642401    .1185583      6.87    0.000      1.425721     1.892013
     ip84c93 |    1.651621     .128439      6.45    0.000      1.418131     1.923555
     ip84c94 |    1.557327    .1189388      5.80    0.000       1.34082     1.808794
     ip84c95 |    1.561937    .1138602      6.12    0.000      1.353984     1.801828
     ip84c96 |    1.589731    .1262918      5.84    0.000      1.360511     1.857569
     ip84c97 |    1.382488    .1051759      4.26    0.000       1.19098     1.604791
     ip84c98 |    1.432649    .1028604      5.01    0.000      1.244588     1.649125
     ip84c99 |    1.370089    .1109709      3.89    0.000      1.168976     1.605803
     ip85c85 |    .2200796    .0288285    -11.56    0.000      .1702471     .2844983
     ip85c86 |    .9802038    .0941599     -0.21    0.835      .8119861     1.183271
     ip85c87 |    1.614331    .1428843      5.41    0.000      1.357228     1.920138
     ip85c88 |    1.884975    .1609473      7.42    0.000      1.594507     2.228358
     ip85c89 |    1.886219    .1581268      7.57    0.000      1.600418     2.223057
     ip85c90 |    2.066924    .1660861      9.04    0.000      1.765741     2.419481
     ip85c91 |    1.870055     .157276      7.44    0.000      1.585865     2.205171
     ip85c92 |    1.848503    .1433423      7.92    0.000      1.587865     2.151922
     ip85c93 |    1.819076     .146413      7.43    0.000      1.553601     2.129913
     ip85c94 |    1.737012    .1368553      7.01    0.000      1.488465     2.027063
     ip85c95 |    1.760251    .1314876      7.57    0.000      1.520518     2.037783
     ip85c96 |    1.797688    .1366935      7.71    0.000      1.548782     2.086596
     ip85c97 |    1.619653    .1275539      6.12    0.000      1.387991     1.889981
     ip85c98 |    1.654499    .1324051      6.29    0.000      1.414318     1.935467
     ip85c99 |    1.526139     .121544      5.31    0.000      1.305579      1.78396
     ip76c00 |    .6976868    .1162345     -2.16    0.031      .5033273     .9670981
     ip76c01 |    .7097633     .118515     -2.05    0.040        .51166     .9845677
     ip76c02 |     .660693    .1277641     -2.14    0.032      .4522674     .9651707
     ip76c03 |    .7082274    .1521801     -1.61    0.108      .4648052     1.079132
     ip76c04 |    .7273556    .1429765     -1.62    0.105      .4947957     1.069222
     ip77c00 |    .7727976    .0659255     -3.02    0.003      .6538105     .9134392
     ip77c01 |    .7955182    .0679393     -2.68    0.007      .6729073       .94047
     ip77c02 |    .7467877    .0703624     -3.10    0.002      .6208645     .8982505
     ip77c03 |    .8546149    .0998451     -1.34    0.179      .6797109     1.074526
     ip77c04 |    .7927754    .0945136     -1.95    0.051      .6275829      1.00145
     ip78c00 |    .7598937    .0723498     -2.88    0.004      .6305356     .9157905
     ip78c01 |    .7599404    .0843698     -2.47    0.013      .6113329     .9446726
     ip78c02 |    .7187213    .0697857     -3.40    0.001      .5941708     .8693801
     ip78c03 |    .7777555     .060648     -3.22    0.001      .6675255     .9061881
     ip78c04 |    .7196721    .0725432     -3.26    0.001      .5906542     .8768717
     ip79c00 |     1.13076    .1390555      1.00    0.318      .8885743     1.438955
     ip79c01 |    1.138488    .1548306      0.95    0.340      .8721028      1.48624
     ip79c02 |    1.086237    .1384679      0.65    0.516      .8460921     1.394541
     ip79c03 |    1.109042    .1510722      0.76    0.447      .8491778      1.44843
     ip79c04 |     1.11976    .1507971      0.84    0.401      .8599922     1.457994
     ip80c00 |    1.054633    .1046228      0.54    0.592      .8682794     1.280982
     ip80c01 |    1.008873    .1076953      0.08    0.934      .8184128     1.243657
     ip80c02 |    .9907499    .0894389     -0.10    0.918      .8300853     1.182511
     ip80c03 |    1.064424    .0923962      0.72    0.472      .8978977     1.261834
     ip80c04 |    1.009668    .0910637      0.11    0.915      .8460715     1.204897
     ip81c00 |     1.04134    .0667239      0.63    0.527      .9184419     1.180683
     ip81c01 |    1.045252    .0695215      0.67    0.506         .9175     1.190792
     ip81c02 |    1.006171    .0636695      0.10    0.923      .8888094     1.139029
     ip81c03 |    1.054375    .0779297      0.72    0.474      .9121828     1.218731
     ip81c04 |    1.039119    .0826022      0.48    0.629      .8892034      1.21431
     ip82c00 |    1.401503    .1858302      2.55    0.011      1.080762     1.817431
     ip82c01 |    1.397512    .1938458      2.41    0.016      1.064847     1.834103
     ip82c02 |    1.322522    .1749584      2.11    0.035       1.02046     1.713995
     ip82c03 |    1.395015    .1564775      2.97    0.003      1.119697     1.738031
     ip82c04 |    1.357319    .1717858      2.41    0.016      1.059135     1.739451
     ip83c00 |    1.261637     .075007      3.91    0.000      1.122868     1.417555
     ip83c01 |    1.231133     .076247      3.36    0.001      1.090406     1.390023
     ip83c02 |    1.165292     .090174      1.98    0.048      1.001305     1.356137
     ip83c03 |    1.215888    .0982666      2.42    0.016      1.037769      1.42458
     ip83c04 |    1.220152    .1188786      2.04    0.041       1.00805     1.476882
     ip84c00 |     1.34759    .1073675      3.74    0.000      1.152761     1.575346
     ip84c01 |     1.33651    .0997418      3.89    0.000      1.154644      1.54702
     ip84c02 |    1.267461    .0895802      3.35    0.001      1.103505     1.455777
     ip84c03 |    1.318017    .0987744      3.68    0.000       1.13797     1.526552
     ip84c04 |    1.290244    .0964583      3.41    0.001      1.114387     1.493851
     ip85c00 |    1.519721    .1118164      5.69    0.000      1.315634     1.755466
     ip85c01 |    1.519759    .1068483      5.95    0.000      1.324128     1.744293
     ip85c02 |    1.447874    .1064023      5.04    0.000      1.253652     1.672185
     ip85c03 |    1.456901    .1169463      4.69    0.000      1.244812     1.705127
     ip85c04 |    1.463358    .1163183      4.79    0.000       1.25225     1.710056
       d1c95 |    .9845281    .0585561     -0.26    0.793      .8761971     1.106253
       d1c00 |    1.022361    .0295541      0.77    0.444      .9660467     1.081958
       d2c95 |    1.041276    .0828982      0.51    0.611      .8908404     1.217116
       d2c00 |    1.050834    .0827787      0.63    0.529      .9004952     1.226272
-------------+----------------------------------------------------------------
Wald chi2(239) =  6.4e+15                                Prob > chi2 =   0.0000

.  * Column 3: Volume fixed effects, no age profile;
. xtpqml cit ip* d1c* d2c*, i(volume) irr fe cluster(journal);
warning: existing panel variable is not volume
note: 2 groups (47 obs) dropped because of all zero outcomes

Iteration 0:   log likelihood = -88353.951
Iteration 1:   log likelihood = -68239.676
Iteration 2:   log likelihood = -66187.004
Iteration 3:   log likelihood = -66123.034
Iteration 4:   log likelihood = -66122.949
Iteration 5:   log likelihood = -66122.949

Conditional fixed-effects Poisson regression    Number of obs     =     18,394
Group variable: volume                          Number of groups  =        756

                                                Obs per group:
                                                              min =         21
                                                              avg =       24.3
                                                              max =         26

                                                Wald chi2(239)    =   31739.49
Log likelihood  = -66122.949                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip76c80 |     .688853    .0346527     19.88    0.000       .620935     .7567711
     ip76c81 |    .7177634    .0344937     20.81    0.000      .6501571     .7853697
     ip76c82 |    .6934738     .034627     20.03    0.000       .625606     .7613415
     ip76c83 |     .718513    .0344896     20.83    0.000      .6509147     .7861114
     ip76c84 |    .6748614    .0347311     19.43    0.000      .6067897     .7429331
     ip76c85 |     .661068    .0348093     18.99    0.000      .5928431     .7292929
     ip76c86 |    .6060083    .0351304     17.25    0.000      .5371539     .6748626
     ip76c87 |    .5526163    .0354562     15.59    0.000      .4831235     .6221092
     ip76c88 |    .4648407    .0360239     12.90    0.000      .3942353     .5354462
     ip76c89 |    .4329518    .0362404     11.95    0.000       .361922     .5039816
     ip76c90 |    .4796984    .0359249     13.35    0.000      .4092869     .5501099
     ip76c91 |    .3664839      .03671      9.98    0.000      .2945336     .4384342
     ip76c92 |    .2981377    .0372198      8.01    0.000      .2251884     .3710871
     ip76c93 |    .2656711    .0374718      7.09    0.000      .1922278     .3391145
     ip76c94 |      .17957    .0381722      4.70    0.000      .1047538     .2543863
     ip76c95 |    .2241614    .0378036      5.93    0.000      .1500678      .298255
     ip76c96 |    .2527761    .0376673      6.71    0.000      .1789495     .3266027
     ip76c97 |    .1150229    .0386385      2.98    0.003      .0392929     .1907529
     ip76c98 |    .1675856    .0381882      4.39    0.000      .0927381     .2424332
     ip76c99 |    .1459661    .0383809      3.80    0.000      .0707409     .2211912
     ip77c80 |    .5326442    .0327145     16.28    0.000      .4685249     .5967635
     ip77c81 |    .5786674    .0324545     17.83    0.000      .5150579      .642277
     ip77c82 |    .5472321     .032631     16.77    0.000      .4832765     .6111877
     ip77c83 |    .5801057    .0324465     17.88    0.000      .5165118     .6436997
     ip77c84 |    .5829762    .0324306     17.98    0.000      .5194134     .6465391
     ip77c85 |    .5699937    .0325027     17.54    0.000      .5062896     .6336979
     ip77c86 |    .5197506    .0327892     15.85    0.000       .455485     .5840162
     ip77c87 |     .476859    .0330433     14.43    0.000      .4120954     .5416226
     ip77c88 |    .4007263    .0335168     11.96    0.000      .3350347     .4664179
     ip77c89 |    .3772368    .0336688     11.20    0.000       .311247     .4432265
     ip77c90 |    .3289966    .0339903      9.68    0.000      .2623768     .3956165
     ip77c91 |    .2695261    .0344042      7.83    0.000      .2020952      .336957
     ip77c92 |    .1883798    .0350012      5.38    0.000      .1197788     .2569809
     ip77c93 |    .1674282    .0351616      4.76    0.000      .0985127     .2363437
     ip77c94 |    .1224581    .0355149      3.45    0.001      .0528501     .1920661
     ip77c95 |    .1144763    .0355789      3.22    0.001      .0447429     .1842097
     ip77c96 |     .145026    .0354655      4.09    0.000       .075515      .214537
     ip77c97 |    .0781552    .0357937      2.18    0.029      .0080009     .1483094
     ip77c98 |    .0196799    .0362836      0.54    0.588     -.0514346     .0907945
     ip77c99 |    .0324131    .0361981      0.90    0.371     -.0385339     .1033601
     ip78c80 |    .5254777    .0348384     15.08    0.000      .4571956     .5937598
     ip78c81 |    .7118333    .0337651     21.08    0.000      .6456549     .7780116
     ip78c82 |    .6841347    .0339143     20.17    0.000       .617664     .7506054
     ip78c83 |    .7578466    .0335249     22.61    0.000      .6921391     .8235542
     ip78c84 |    .7478414    .0335763     22.27    0.000       .682033     .8136497
     ip78c85 |    .7495736    .0335674     22.33    0.000      .6837827     .8153644
     ip78c86 |    .6848735    .0339102     20.20    0.000      .6184107     .7513364
     ip78c87 |    .6298416    .0342169     18.41    0.000      .5627777     .6969055
     ip78c88 |    .5981307    .0344001     17.39    0.000      .5307077     .6655536
     ip78c89 |    .5289364     .034817     15.19    0.000      .4606964     .5971764
     ip78c90 |    .5141535    .0349091     14.73    0.000      .4457329     .5825742
     ip78c91 |    .4419643    .0353757     12.49    0.000      .3726292     .5112993
     ip78c92 |    .3793072    .0358034     10.59    0.000      .3091339     .4494805
     ip78c93 |      .33367    .0361288      9.24    0.000      .2628589      .404481
     ip78c94 |    .2940714    .0364209      8.07    0.000      .2226878      .365455
     ip78c95 |    .2841975    .0364952      7.79    0.000      .2126683     .3557267
     ip78c96 |    .3053534    .0364857      8.37    0.000      .2338428      .376864
     ip78c97 |    .1793603    .0372395      4.82    0.000      .1063722     .2523485
     ip78c98 |    .2252223    .0368795      6.11    0.000      .1529397     .2975049
     ip78c99 |    .1416025     .037569      3.77    0.000      .0679686     .2152363
     ip79c80 |   -.3898642    .0346817    -11.24    0.000     -.4578391    -.3218894
     ip79c81 |    .1119227    .0305592      3.66    0.000      .0520277     .1718177
     ip79c82 |     .313456    .0293008     10.70    0.000      .2560275     .3708845
     ip79c83 |      .38631    .0288935     13.37    0.000      .3296799     .4429402
     ip79c84 |    .3787533    .0289346     13.09    0.000      .3220426     .4354641
     ip79c85 |    .3906919    .0288697     13.53    0.000      .3341083     .4472755
     ip79c86 |     .354116    .0290705     12.18    0.000      .2971389     .4110932
     ip79c87 |    .3265281    .0292259     11.17    0.000      .2692463     .3838098
     ip79c88 |     .290592    .0294337      9.87    0.000      .2329031     .3482809
     ip79c89 |    .2525994    .0296598      8.52    0.000      .1944671     .3107316
     ip79c90 |    .2643621    .0295891      8.93    0.000      .2063686     .3223557
     ip79c91 |    .1980739    .0299967      6.60    0.000      .1392815     .2568663
     ip79c92 |    .1680947    .0301881      5.57    0.000      .1089271     .2272624
     ip79c93 |    .1440067    .0303453      4.75    0.000       .084531     .2034823
     ip79c94 |    .1262643    .0304629      4.14    0.000       .066558     .1859705
     ip79c95 |    .1351748    .0304036      4.45    0.000      .0755848     .1947649
     ip79c96 |    .1458119    .0305412      4.77    0.000      .0859524     .2056715
     ip79c97 |    .0552722    .0309071      1.79    0.074     -.0053047      .115849
     ip79c98 |    .0327261    .0310693      1.05    0.292     -.0281686     .0936208
     ip79c99 |     .064485    .0308646      2.09    0.037      .0039915     .1249785
     ip80c80 |   -1.751593    .0581072    -30.14    0.000     -1.865481    -1.637705
     ip80c81 |   -.2557097    .0344165     -7.43    0.000     -.3231649    -.1882546
     ip80c82 |    .3039061      .03022     10.06    0.000      .2446759     .3631362
     ip80c83 |    .5487297    .0288914     18.99    0.000      .4921037     .6053558
     ip80c84 |     .503557    .0291169     17.29    0.000      .4464889     .5606251
     ip80c85 |    .5605508    .0288337     19.44    0.000      .5040378     .6170639
     ip80c86 |    .5176749    .0290455     17.82    0.000      .4607467      .574603
     ip80c87 |    .4673649    .0293038     15.95    0.000      .4099305     .5247992
     ip80c88 |     .444061    .0294271     15.09    0.000      .3863851      .501737
     ip80c89 |    .4172993    .0295716     14.11    0.000      .3593401     .4752586
     ip80c90 |    .3884732    .0297308     13.07    0.000      .3302019     .4467446
     ip80c91 |     .394107    .0296994     13.27    0.000      .3358973     .4523168
     ip80c92 |    .3132654    .0301642     10.39    0.000      .2541446     .3723862
     ip80c93 |    .2893339    .0303077      9.55    0.000      .2299318     .3487359
     ip80c94 |    .2354297    .0306412      7.68    0.000      .1753741     .2954853
     ip80c95 |    .2272632     .030693      7.40    0.000      .1671061     .2874203
     ip80c96 |    .2336015    .0308324      7.58    0.000      .1731711      .294032
     ip80c97 |    .1626995    .0310695      5.24    0.000      .1018043     .2235946
     ip80c98 |    .1596095     .031095      5.13    0.000      .0986645     .2205546
     ip80c99 |    .1543794    .0311555      4.96    0.000      .0933157     .2154432
     ip81c81 |   -1.785957    .0581202    -30.73    0.000     -1.899871    -1.672044
     ip81c82 |   -.2434852    .0338316     -7.20    0.000      -.309794    -.1771764
     ip81c83 |    .3785405    .0293803     12.88    0.000      .3209561     .4361249
     ip81c84 |    .4901437    .0287882     17.03    0.000      .4337198     .5465676
     ip81c85 |    .6088339    .0282155     21.58    0.000      .5535325     .6641352
     ip81c86 |    .5618943    .0284353     19.76    0.000      .5061622     .6176264
     ip81c87 |    .5432585    .0285249     19.05    0.000      .4873507     .5991664
     ip81c88 |    .4886841    .0287956     16.97    0.000      .4322457     .5451224
     ip81c89 |    .4475333    .0290079     15.43    0.000      .3906788     .5043879
     ip81c90 |    .4715947    .0288829     16.33    0.000      .4149852     .5282042
     ip81c91 |    .4027079    .0292475     13.77    0.000      .3453839      .460032
     ip81c92 |     .346055     .029563     11.71    0.000      .2881125     .4039975
     ip81c93 |     .310735    .0297672     10.44    0.000      .2523924     .3690777
     ip81c94 |    .2417422    .0301831      8.01    0.000      .1825844     .3008999
     ip81c95 |    .2473361    .0301485      8.20    0.000      .1882461      .306426
     ip81c96 |    .2605678    .0302079      8.63    0.000      .2013613     .3197742
     ip81c97 |    .1755091    .0305548      5.74    0.000      .1156228     .2353954
     ip81c98 |    .1726488    .0305762      5.65    0.000      .1127206      .232577
     ip81c99 |    .1380976    .0308243      4.48    0.000       .077683     .1985121
     ip82c82 |    -1.92742    .0545994    -35.30    0.000     -2.034433    -1.820407
     ip82c83 |   -.3235955     .030795    -10.51    0.000     -.3839527    -.2632384
     ip82c84 |    .1943693    .0272294      7.14    0.000      .1410007      .247738
     ip82c85 |    .3938198    .0261976     15.03    0.000      .3424735     .4451661
     ip82c86 |    .3875565    .0262275     14.78    0.000      .3361515     .4389614
     ip82c87 |    .3970613    .0261821     15.17    0.000      .3457452     .4483773
     ip82c88 |     .412868    .0261075     15.81    0.000      .3616982     .4640377
     ip82c89 |    .3470381    .0264249     13.13    0.000      .2952463     .3988299
     ip82c90 |    .3764368     .026281     14.32    0.000      .3249269     .4279467
     ip82c91 |    .3269475    .0265252     12.33    0.000      .2749591     .3789359
     ip82c92 |    .2998823    .0266629     11.25    0.000      .2476239     .3521406
     ip82c93 |    .3064451    .0266292     11.51    0.000      .2542527     .3586374
     ip82c94 |    .2475054    .0269381      9.19    0.000      .1947077     .3003032
     ip82c95 |    .2437401    .0269584      9.04    0.000      .1909026     .2965775
     ip82c96 |    .2790694    .0269489     10.36    0.000      .2262505     .3318883
     ip82c97 |    .1721458    .0273301      6.30    0.000      .1185799     .2257118
     ip82c98 |    .1687379    .0273547      6.17    0.000      .1151238     .2223521
     ip82c99 |    .1170315    .0276767      4.23    0.000      .0627862     .1712767
     ip83c83 |   -1.449501    .0455785    -31.80    0.000     -1.538833    -1.360168
     ip83c84 |   -.1349366    .0297687     -4.53    0.000     -.1932823     -.076591
     ip83c85 |    .4015414    .0265434     15.13    0.000      .3495173     .4535655
     ip83c86 |    .5219077    .0259912     20.08    0.000      .4709659     .5728495
     ip83c87 |    .5268851    .0259695     20.29    0.000      .4759858     .5777844
     ip83c88 |    .5593036    .0258305     21.65    0.000      .5086767     .6099305
     ip83c89 |    .5005888     .026085     19.19    0.000      .4494632     .5517145
     ip83c90 |    .4832947    .0261624     18.47    0.000      .4320173      .534572
     ip83c91 |    .4384571    .0263682     16.63    0.000      .3867764     .4901377
     ip83c92 |    .4170259    .0264693     15.76    0.000      .3651471     .4689047
     ip83c93 |    .3899627    .0265995     14.66    0.000      .3378287     .4420967
     ip83c94 |    .2875883    .0271188     10.60    0.000      .2344364     .3407402
     ip83c95 |    .3219676    .0269396     11.95    0.000       .269167     .3747682
     ip83c96 |    .3128938    .0270805     11.55    0.000      .2598169     .3659707
     ip83c97 |    .2291136    .0273933      8.36    0.000      .1754238     .2828035
     ip83c98 |     .186243    .0276338      6.74    0.000      .1320819     .2404042
     ip83c99 |    .1785509    .0276904      6.45    0.000      .1242787     .2328232
     ip84c84 |   -1.624053    .0472413    -34.38    0.000     -1.716644    -1.531461
     ip84c85 |   -.2727205    .0298595     -9.13    0.000      -.331244     -.214197
     ip84c86 |    .2649877    .0263983     10.04    0.000      .2132479     .3167275
     ip84c87 |    .3936192    .0257656     15.28    0.000      .3431196     .4441189
     ip84c88 |    .3827404    .0258166     14.83    0.000      .3321408       .43334
     ip84c89 |    .4103101    .0256883     15.97    0.000      .3599621     .4606582
     ip84c90 |    .4091271    .0256937     15.92    0.000      .3587684     .4594859
     ip84c91 |    .3746866    .0258546     14.49    0.000      .3240125     .4253608
     ip84c92 |    .3341811    .0260498     12.83    0.000      .2831245     .3852377
     ip84c93 |    .3397791    .0260224     13.06    0.000      .2887761     .3907821
     ip84c94 |    .2809924     .026316     10.68    0.000       .229414     .3325708
     ip84c95 |    .2839482    .0263009     10.80    0.000      .2323994      .335497
     ip84c96 |    .2996504    .0262956     11.40    0.000       .248112     .3511888
     ip84c97 |    .1616531     .026911      6.01    0.000      .1089085     .2143977
     ip84c98 |    .1969469    .0267189      7.37    0.000      .1445788     .2493149
     ip84c99 |    .1518585    .0269855      5.63    0.000      .0989679     .2047491
     ip85c85 |   -1.810032    .0475519    -38.06    0.000     -1.903232    -1.716832
     ip85c86 |   -.3162607     .028298    -11.18    0.000     -.3717236    -.2607977
     ip85c87 |     .182655    .0251929      7.25    0.000      .1332779     .2320321
     ip85c88 |    .3376489    .0244503     13.81    0.000      .2897271     .3855707
     ip85c89 |    .3383083    .0244474     13.84    0.000      .2903924     .3862243
     ip85c90 |    .4297958    .0240513     17.87    0.000      .3826562     .4769355
     ip85c91 |    .3297018    .0244862     13.46    0.000      .2817098     .3776939
     ip85c92 |    .3181101    .0245389     12.96    0.000      .2700148     .3662054
     ip85c93 |    .3020627    .0246127     12.27    0.000      .2538228     .3503027
     ip85c94 |    .2559007    .0248304     10.31    0.000       .207234     .3045674
     ip85c95 |    .2691836    .0247667     10.87    0.000      .2206417     .3177255
     ip85c96 |    .2884705    .0247675     11.65    0.000      .2399271     .3370138
     ip85c97 |    .1848687    .0251461      7.35    0.000      .1355833      .234154
     ip85c98 |    .2059225    .0250438      8.22    0.000      .1568376     .2550074
     ip85c99 |    .1244419    .0254793      4.88    0.000      .0745034     .1743804
     ip76c00 |    .0797388    .0382248      2.09    0.037      .0048196     .1546581
     ip76c01 |    .0977015    .0378374      2.58    0.010      .0235416     .1718614
     ip76c02 |    .0246765    .0382025      0.65    0.518      -.050199      .099552
     ip76c03 |    .0914996     .037438      2.44    0.015      .0181224     .1648767
     ip76c04 |    .1179106    .0371965      3.17    0.002      .0450068     .1908144
     ip77c00 |    .0151733    .0354112      0.43    0.668     -.0542313     .0845779
     ip77c01 |    .0442564    .0349834      1.27    0.206     -.0243097     .1128226
     ip77c02 |   -.0192784    .0352341     -0.55    0.584      -.088336     .0497791
     ip77c03 |    .1150647    .0340079      3.38    0.001      .0484105     .1817189
     ip77c04 |    .0400716    .0346237      1.16    0.247     -.0277896     .1079328
     ip78c00 |    .1294726    .0367359      3.52    0.000      .0574715     .2014737
     ip78c01 |    .1296716    .0365699      3.55    0.000      .0579959     .2013474
     ip78c02 |    .0741833    .0367591      2.02    0.044      .0021368     .1462298
     ip78c03 |    .1535014    .0360087      4.26    0.000      .0829256     .2240773
     ip78c04 |    .0756115    .0366697      2.06    0.039      .0037402     .1474827
     ip79c00 |    .0653787    .0297507      2.20    0.028      .0070685     .1236889
     ip79c01 |    .0720872    .0295284      2.44    0.015      .0142125     .1299618
     ip79c02 |    .0253175    .0295378      0.86    0.391     -.0325755     .0832105
     ip79c03 |    .0470123    .0293262      1.60    0.109     -.0104661     .1044907
     ip79c04 |     .056537    .0292533      1.93    0.053     -.0007984     .1138724
     ip80c00 |    .1140617    .0302615      3.77    0.000      .0547502     .1733733
     ip80c01 |    .0704732     .030403      2.32    0.020      .0108844     .1300621
     ip80c02 |    .0532406    .0302484      1.76    0.078     -.0060451     .1125263
     ip80c03 |    .1251054    .0296364      4.22    0.000      .0670192     .1831916
     ip80c04 |    .0724675    .0300076      2.41    0.016      .0136537     .1312813
     ip81c00 |     .086059    .0301232      2.86    0.004      .0270185     .1450994
     ip81c01 |    .0896849    .0299052      3.00    0.003      .0310719      .148298
     ip81c02 |    .0514371    .0298388      1.72    0.085      -.007046     .1099201
     ip81c03 |    .0985948     .029403      3.35    0.001      .0409659     .1562236
     ip81c04 |    .0840592    .0295015      2.85    0.004      .0262374      .141881
     ip82c00 |    .1370007    .0263212      5.20    0.000      .0854121     .1885893
     ip82c01 |    .1346116     .026138      5.15    0.000      .0833821     .1858411
     ip82c02 |     .079872    .0261581      3.05    0.002      .0286031     .1311408
     ip82c03 |    .1332977    .0257148      5.18    0.000      .0828976     .1836978
     ip82c04 |    .1060932    .0258776      4.10    0.000       .055374     .1568124
     ip83c00 |    .1356524    .0269382      5.04    0.000      .0828545     .1884503
     ip83c01 |    .1110903    .0268288      4.14    0.000      .0585068     .1636737
     ip83c02 |    .0552934    .0267619      2.07    0.039      .0028409     .1077458
     ip83c03 |    .0970377    .0263545      3.68    0.000      .0453838     .1486917
     ip83c04 |    .1002802    .0263286      3.81    0.000       .048677     .1518834
     ip84c00 |    .1374466    .0260572      5.27    0.000      .0863754     .1885178
     ip84c01 |    .1282405    .0258328      4.96    0.000       .077609     .1788719
     ip84c02 |    .0738426    .0256917      2.87    0.004      .0234878     .1241973
     ip84c03 |     .113151    .0253511      4.46    0.000      .0634637     .1628383
     ip84c04 |    .0919678    .0254762      3.61    0.000      .0420353     .1419002
     ip85c00 |    .1227878    .0243908      5.03    0.000      .0749827     .1705928
     ip85c01 |    .1225671    .0240816      5.09    0.000       .075368     .1697662
     ip85c02 |    .0733056    .0239275      3.06    0.002      .0264085     .1202027
     ip85c03 |    .0788884    .0237684      3.32    0.001      .0323032     .1254735
     ip85c04 |    .0834101    .0237398      3.51    0.000      .0368809     .1299393
       d1c95 |   -.0097966    .0113014     -0.87    0.386     -.0319469     .0123536
       d1c00 |    .0219873    .0118069      1.86    0.063     -.0011537     .0451283
       d2c95 |    .0496949    .0084819      5.86    0.000      .0330707      .066319
       d2c00 |    .0504626    .0093307      5.41    0.000      .0321748     .0687504
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     ip76c80 |     1.99143    .4501836      3.05    0.002      1.278622     3.101616
     ip76c81 |    2.049843    .4347189      3.38    0.001      1.352704     3.106266
     ip76c82 |    2.000653    .4120006      3.37    0.001       1.33623     2.995452
     ip76c83 |    2.051381    .4029114      3.66    0.000      1.395924     3.014606
     ip76c84 |    1.963761     .367947      3.60    0.000      1.360192     2.835156
     ip76c85 |     1.93686      .35633      3.59    0.000      1.350517      2.77777
     ip76c86 |      1.8331    .3239094      3.43    0.001      1.296518     2.591754
     ip76c87 |    1.737794    .2813785      3.41    0.001      1.265244     2.386834
     ip76c88 |    1.591761    .2438295      3.03    0.002      1.178932      2.14915
     ip76c89 |    1.541802    .2294034      2.91    0.004      1.151805      2.06385
     ip76c90 |    1.615587    .2062328      3.76    0.000      1.257978     2.074856
     ip76c91 |    1.442653    .2047697      2.58    0.010      1.092302     1.905378
     ip76c92 |    1.347347    .1623011      2.47    0.013      1.064006     1.706142
     ip76c93 |    1.304306     .162649      2.13    0.033      1.021488     1.665427
     ip76c94 |    1.196703     .159818      1.34    0.179      .9211057     1.554759
     ip76c95 |    1.251273    .1583568      1.77    0.077       .976398     1.603531
     ip76c96 |    1.287595    .1471564      2.21    0.027      1.029194     1.610873
     ip76c97 |    1.121899    .1209587      1.07    0.286      .9081983     1.385884
     ip76c98 |    1.182447    .1206836      1.64    0.101      .9680674       1.4443
     ip76c99 |    1.157157    .0959566      1.76    0.078      .9835735     1.361375
     ip77c80 |    1.703431    .2753872      3.29    0.001      1.240835     2.338487
     ip77c81 |     1.78366    .2546177      4.05    0.000      1.348351     2.359507
     ip77c82 |    1.728462    .2482135      3.81    0.000       1.30444     2.290317
     ip77c83 |    1.786227     .245935      4.21    0.000      1.363766     2.339557
     ip77c84 |    1.791362    .2365582      4.41    0.000      1.382859     2.320538
     ip77c85 |    1.768256    .2268611      4.44    0.000      1.375115     2.273795
     ip77c86 |    1.681608    .2227634      3.92    0.000      1.297077     2.180138
     ip77c87 |    1.611006    .1907092      4.03    0.000      1.277418     2.031709
     ip77c88 |    1.492909    .1826457      3.28    0.001      1.174615     1.897453
     ip77c89 |     1.45825     .179709      3.06    0.002      1.145336     1.856652
     ip77c90 |    1.389573    .1395337      3.28    0.001      1.141322     1.691822
     ip77c91 |    1.309344     .154615      2.28    0.022      1.038816     1.650321
     ip77c92 |    1.207292    .1307984      1.74    0.082      .9763215     1.492904
     ip77c93 |     1.18226    .1382541      1.43    0.152      .9400983     1.486802
     ip77c94 |    1.130272    .1221073      1.13    0.257      .9145859     1.396823
     ip77c95 |    1.121286    .1174238      1.09    0.274      .9132224     1.376754
     ip77c96 |     1.15607    .1055512      1.59    0.112      .9666466     1.382612
     ip77c97 |     1.08129    .0948083      0.89    0.373      .9105597     1.284033
     ip77c98 |    1.019875    .0909361      0.22    0.825      .8563482     1.214628
     ip77c99 |    1.032944    .0788846      0.42    0.671      .8893478     1.199726
     ip78c80 |    1.691267    .1988859      4.47    0.000      1.343118     2.129658
     ip78c81 |    2.037724    .2587243      5.61    0.000      1.588804     2.613485
     ip78c82 |    1.982056     .230186      5.89    0.000      1.578562     2.488687
     ip78c83 |    2.133677    .2354221      6.87    0.000       1.71874     2.648787
     ip78c84 |    2.112435    .2086346      7.57    0.000      1.740662     2.563612
     ip78c85 |    2.116097    .2309461      6.87    0.000      1.708588       2.6208
     ip78c86 |    1.983521    .1865146      7.28    0.000      1.649668     2.384938
     ip78c87 |    1.877313    .1602518      7.38    0.000      1.588094     2.219204
     ip78c88 |    1.818716     .161678      6.73    0.000      1.527903     2.164881
     ip78c89 |    1.697126    .1437338      6.25    0.000      1.437553      2.00357
     ip78c90 |    1.672222    .1396762      6.16    0.000      1.419696     1.969666
     ip78c91 |     1.55576    .1180477      5.82    0.000      1.340773     1.805219
     ip78c92 |    1.461272    .0998682      5.55    0.000      1.278077     1.670725
     ip78c93 |    1.396082    .0930489      5.01    0.000      1.225119     1.590903
     ip78c94 |     1.34188    .0895759      4.41    0.000      1.177314     1.529448
     ip78c95 |    1.328695    .0828476      4.56    0.000      1.175847     1.501413
     ip78c96 |    1.357105    .0731439      5.67    0.000      1.221057      1.50831
     ip78c97 |    1.196452    .0763632      2.81    0.005      1.055766     1.355885
     ip78c98 |    1.252601    .0721785      3.91    0.000       1.11883     1.402366
     ip78c99 |    1.152119    .0534974      3.05    0.002      1.051895     1.261891
     ip79c80 |    .6771488    .1129523     -2.34    0.019      .4883136     .9390083
     ip79c81 |    1.118426    .1958695      0.64    0.523      .7934816     1.576442
     ip79c82 |    1.368145    .2183783      1.96    0.050      1.000614     1.870673
     ip79c83 |    1.471541    .2112513      2.69    0.007      1.110646     1.949706
     ip79c84 |    1.460463    .2077446      2.66    0.008      1.105123     1.930058
     ip79c85 |    1.478003    .1998349      2.89    0.004      1.133934     1.926473
     ip79c86 |     1.42492     .180471      2.80    0.005      1.111688      1.82641
     ip79c87 |    1.386147    .1565357      2.89    0.004      1.110924     1.729555
     ip79c88 |    1.337219    .1548421      2.51    0.012      1.065708     1.677902
     ip79c89 |    1.287367    .1401796      2.32    0.020      1.039959     1.593634
     ip79c90 |      1.3026    .1264924      2.72    0.006      1.076844     1.575684
     ip79c91 |    1.219052     .114306      2.11    0.035      1.014398     1.464996
     ip79c92 |    1.183049    .0961228      2.07    0.039      1.008887     1.387276
     ip79c93 |    1.154892     .086844      1.92    0.055      .9966296     1.338286
     ip79c94 |    1.134582    .0811362      1.77    0.077      .9861995      1.30529
     ip79c95 |    1.144737    .0836885      1.85    0.064      .9919202     1.321097
     ip79c96 |    1.156979    .0692055      2.44    0.015      1.028987      1.30089
     ip79c97 |    1.056828    .0690328      0.85    0.397      .9298293     1.201173
     ip79c98 |    1.033267    .0499731      0.68    0.499      .9398209     1.136005
     ip79c99 |     1.06661    .0523944      1.31    0.189       .968707     1.174407
     ip80c80 |    .1734974    .0212634    -14.29    0.000      .1364494     .2206043
     ip80c81 |    .7743667    .0762564     -2.60    0.009      .6384457     .9392245
     ip80c82 |    1.355142    .1226172      3.36    0.001      1.134921     1.618095
     ip80c83 |    1.731053    .1440353      6.59    0.000      1.470566      2.03768
     ip80c84 |    1.654596    .1286011      6.48    0.000      1.420802     1.926861
     ip80c85 |    1.751637    .1513502      6.49    0.000      1.478754     2.074876
     ip80c86 |    1.678121    .1341016      6.48    0.000      1.434836     1.962657
     ip80c87 |    1.595784    .1311169      5.69    0.000      1.358424     1.874617
     ip80c88 |    1.559026    .1112791      6.22    0.000      1.355491     1.793122
     ip80c89 |    1.517857    .0999839      6.34    0.000      1.334015     1.727034
     ip80c90 |    1.474727    .1025872      5.58    0.000      1.286765     1.690147
     ip80c91 |    1.483059    .0943698      6.19    0.000      1.309167     1.680049
     ip80c92 |    1.367884    .0842047      5.09    0.000      1.212414     1.543292
     ip80c93 |    1.335538    .0852462      4.53    0.000      1.178487     1.513518
     ip80c94 |    1.265452    .0814209      3.66    0.000      1.115523     1.435533
     ip80c95 |     1.25516    .0845426      3.37    0.001      1.099931     1.432296
     ip80c96 |    1.263141    .0701735      4.20    0.000      1.132827     1.408446
     ip80c97 |    1.176683    .0664963      2.88    0.004      1.053311     1.314505
     ip80c98 |    1.173053    .0693145      2.70    0.007      1.044771     1.317086
     ip80c99 |    1.166934    .0734411      2.45    0.014      1.031515      1.32013
     ip81c81 |    .1676365    .0245385    -12.20    0.000      .1258259     .2233402
     ip81c82 |    .7838911    .0978378     -1.95    0.051      .6137859     1.001139
     ip81c83 |    1.460152    .1617681      3.42    0.001      1.175154     1.814268
     ip81c84 |    1.632551    .1776434      4.50    0.000      1.318999     2.020639
     ip81c85 |    1.838286     .214874      5.21    0.000        1.4619     2.311578
     ip81c86 |    1.753992    .2040079      4.83    0.000      1.396445     2.203086
     ip81c87 |    1.721608     .186615      5.01    0.000      1.392091     2.129123
     ip81c88 |     1.63017    .1790935      4.45    0.000      1.314372     2.021843
     ip81c89 |    1.564448    .1660596      4.22    0.000      1.270603      1.92625
     ip81c90 |    1.602548     .177958      4.25    0.000      1.289103     1.992206
     ip81c91 |     1.49587    .1687516      3.57    0.000      1.199136     1.866033
     ip81c92 |     1.41348    .1514954      3.23    0.001      1.145668     1.743897
     ip81c93 |    1.364428    .1612564      2.63    0.009      1.082307     1.720088
     ip81c94 |    1.273466    .1350374      2.28    0.023       1.03449     1.567646
     ip81c95 |    1.280609    .1393287      2.27    0.023      1.034682     1.584989
     ip81c96 |    1.297667    .1467116      2.30    0.021      1.039748     1.619565
     ip81c97 |    1.191853     .110494      1.89    0.058      .9938244      1.42934
     ip81c98 |    1.188449    .1065518      1.93    0.054      .9969305     1.416759
     ip81c99 |    1.148088     .093799      1.69    0.091       .978209     1.347468
     ip82c82 |    .1455232    .0200032    -14.02    0.000      .1111549     .1905179
     ip82c83 |    .7235428    .0867495     -2.70    0.007      .5720172     .9152071
     ip82c84 |    1.214545    .1515216      1.56    0.119       .951089     1.550979
     ip82c85 |    1.482633    .1814854      3.22    0.001      1.166381     1.884635
     ip82c86 |    1.473376    .1604585      3.56    0.000      1.190182     1.823955
     ip82c87 |    1.487447    .1504203      3.93    0.000      1.220008     1.813512
     ip82c88 |    1.511146      .13396      4.66    0.000      1.270132     1.797892
     ip82c89 |    1.414871    .1264608      3.88    0.000      1.187508     1.685764
     ip82c90 |    1.457083    .1233505      4.45    0.000      1.234313      1.72006
     ip82c91 |    1.386729     .102078      4.44    0.000      1.200422      1.60195
     ip82c92 |      1.3497    .1027683      3.94    0.000      1.162587     1.566928
     ip82c93 |    1.358587    .0966294      4.31    0.000      1.181805     1.561813
     ip82c94 |    1.280826     .092015      3.45    0.001      1.112601     1.474487
     ip82c95 |    1.276013    .0861883      3.61    0.000      1.117791      1.45663
     ip82c96 |    1.321899    .0801727      4.60    0.000      1.173744     1.488755
     ip82c97 |    1.187851     .077457      2.64    0.008      1.045339     1.349792
     ip82c98 |     1.18381    .0625157      3.20    0.001      1.067409     1.312904
     ip82c99 |    1.124155    .0561283      2.34    0.019      1.019357     1.239727
     ip83c83 |    .2346875    .0393326     -8.65    0.000      .1689788     .3259474
     ip83c84 |    .8737713    .0967314     -1.22    0.223      .7033394     1.085502
     ip83c85 |    1.494126    .1664199      3.61    0.000      1.201097     1.858645
     ip83c86 |     1.68524    .1770344      4.97    0.000      1.371649     2.070524
     ip83c87 |    1.693649    .1841815      4.84    0.000      1.368537     2.095994
     ip83c88 |    1.749454    .1759149      5.56    0.000      1.436516     2.130563
     ip83c89 |    1.649692    .1701835      4.85    0.000      1.347697     2.019359
     ip83c90 |    1.621408    .1598692      4.90    0.000      1.336486      1.96707
     ip83c91 |    1.550313    .1668007      4.08    0.000       1.25556     1.914263
     ip83c92 |    1.517442    .1489679      4.25    0.000      1.251841     1.839394
     ip83c93 |    1.476926     .141583      4.07    0.000      1.223939     1.782205
     ip83c94 |    1.333208    .1241443      3.09    0.002      1.110802     1.600145
     ip83c95 |     1.37984    .1319292      3.37    0.001      1.144047     1.664232
     ip83c96 |    1.367376    .1087182      3.94    0.000      1.170065      1.59796
     ip83c97 |    1.257485    .1063346      2.71    0.007      1.065428     1.484163
     ip83c98 |    1.204715    .0910387      2.46    0.014      1.038867     1.397039
     ip83c99 |    1.195484    .0901432      2.37    0.018      1.031242     1.385884
     ip84c84 |    .1970983    .0290974    -11.00    0.000      .1475778     .2632357
     ip84c85 |    .7613055    .0906178     -2.29    0.022      .6028939     .9613402
     ip84c86 |    1.303415     .137781      2.51    0.012      1.059508     1.603472
     ip84c87 |    1.482336    .1453476      4.01    0.000      1.223161     1.796427
     ip84c88 |    1.466297    .1400114      4.01    0.000      1.216029     1.768073
     ip84c89 |    1.507285     .147721      4.19    0.000      1.243866     1.826489
     ip84c90 |    1.505503     .141193      4.36    0.000      1.252714     1.809303
     ip84c91 |    1.454536    .1401008      3.89    0.000      1.204305     1.756758
     ip84c92 |    1.396796    .1226403      3.81    0.000      1.175971     1.659088
     ip84c93 |    1.404637    .1263045      3.78    0.000      1.177672     1.675344
     ip84c94 |    1.324444     .108211      3.44    0.001      1.128464     1.554459
     ip84c95 |    1.328364    .1102877      3.42    0.001      1.128875     1.563106
     ip84c96 |    1.349387    .1049734      3.85    0.000       1.15856     1.571645
     ip84c97 |    1.175452    .0842577      2.26    0.024      1.021386     1.352758
     ip84c98 |    1.217679    .0885364      2.71    0.007      1.055949     1.404181
     ip84c99 |    1.163996    .0792706      2.23    0.026      1.018551     1.330209
     ip85c85 |    .1636489     .022361    -13.25    0.000      .1252001     .2139053
     ip85c86 |    .7288694    .0718224     -3.21    0.001      .6008593     .8841516
     ip85c87 |      1.2004    .1119239      1.96    0.050      .9999104      1.44109
     ip85c88 |    1.401648    .1214661      3.90    0.000      1.182699     1.661131
     ip85c89 |    1.402573    .1224033      3.88    0.000      1.182063     1.664218
     ip85c90 |    1.536944    .1342467      4.92    0.000      1.295115     1.823927
     ip85c91 |    1.390553    .1273219      3.60    0.000      1.162117     1.663893
     ip85c92 |    1.374528    .1171959      3.73    0.000      1.162995     1.624535
     ip85c93 |    1.352646    .1145779      3.57    0.000      1.145729     1.596932
     ip85c94 |    1.291624    .1076138      3.07    0.002      1.097026     1.520742
     ip85c95 |    1.308895    .1041975      3.38    0.001      1.119807     1.529913
     ip85c96 |    1.334385     .095618      4.03    0.000      1.159542     1.535591
     ip85c97 |     1.20306    .0878916      2.53    0.011      1.042561     1.388268
     ip85c98 |    1.228658    .0797743      3.17    0.002      1.081843     1.395397
     ip85c99 |    1.132516    .0702554      2.01    0.045       1.00286     1.278935
     ip76c00 |    1.083004    .0844555      1.02    0.307       .929504     1.261854
     ip76c01 |    1.102634    .0733045      1.47    0.142      .9679262     1.256088
     ip76c02 |    1.024983     .051995      0.49    0.627      .9279774      1.13213
     ip76c03 |    1.095816    .0346432      2.89    0.004      1.029978     1.165863
     ip76c04 |    1.125143    .0318344      4.17    0.000      1.064448       1.1893
     ip77c00 |    1.015289    .0682769      0.23    0.821      .8899129     1.158329
     ip77c01 |     1.04525    .0588571      0.79    0.432      .9360303     1.167215
     ip77c02 |    .9809062    .0486436     -0.39    0.697      .8900533     1.081033
     ip77c03 |    1.121946    .0309007      4.18    0.000      1.062987     1.184175
     ip77c04 |    1.040885    .0305162      1.37    0.172      .9827606     1.102448
     ip78c00 |    1.138228    .0455716      3.23    0.001      1.052324     1.231145
     ip78c01 |    1.138455    .0446657      3.31    0.001      1.054193     1.229451
     ip78c02 |    1.077004    .0296059      2.70    0.007      1.020513     1.136622
     ip78c03 |    1.165909    .0448921      3.99    0.000      1.081161     1.257302
     ip78c04 |    1.078543    .0321465      2.54    0.011      1.017342     1.143426
     ip79c00 |    1.067563    .0447428      1.56    0.119      .9833741      1.15896
     ip79c01 |    1.074749    .0320735      2.42    0.016      1.013689     1.139487
     ip79c02 |    1.025641     .034633      0.75    0.453      .9599588     1.095817
     ip79c03 |    1.048135    .0296539      1.66    0.097      .9915964     1.107897
     ip79c04 |    1.058166    .0254336      2.35    0.019      1.009473     1.109208
     ip80c00 |    1.120821    .0565895      2.26    0.024      1.015219     1.237408
     ip80c01 |    1.073016    .0540299      1.40    0.162       .972177     1.184314
     ip80c02 |    1.054683    .0335039      1.68    0.094      .9910195     1.122437
     ip80c03 |    1.133268    .0409006      3.47    0.001      1.055874     1.216335
     ip80c04 |    1.075158    .0350722      2.22    0.026      1.008569     1.146143
     ip81c00 |    1.089871    .0779842      1.20    0.229      .9472582     1.253954
     ip81c01 |     1.09383     .067089      1.46    0.144      .9699336     1.233552
     ip81c02 |    1.052783    .0531685      1.02    0.308      .9535661     1.162323
     ip81c03 |    1.103619    .0486226      2.24    0.025      1.012319     1.203153
     ip81c04 |    1.087693    .0418016      2.19    0.029      1.008773     1.172788
     ip82c00 |    1.146829    .0487739      3.22    0.001       1.05511     1.246521
     ip82c01 |    1.144092    .0463919      3.32    0.001      1.056685      1.23873
     ip82c02 |    1.083148    .0318348      2.72    0.007      1.022516     1.147376
     ip82c03 |     1.14259    .0233282      6.53    0.000       1.09777      1.18924
     ip82c04 |    1.111925    .0264518      4.46    0.000      1.061271     1.164998
     ip83c00 |    1.145284    .0803695      1.93    0.053      .9981151     1.314152
     ip83c01 |    1.117496    .0732379      1.70    0.090      .9827889     1.270666
     ip83c02 |    1.056851    .0402852      1.45    0.147      .9807705     1.138832
     ip83c03 |    1.101902    .0361133      2.96    0.003      1.033347     1.175005
     ip83c04 |    1.105481    .0317973      3.49    0.000      1.044883     1.169592
     ip84c00 |     1.14734    .0662716      2.38    0.017      1.024533     1.284868
     ip84c01 |    1.136826    .0682952      2.13    0.033       1.01055     1.278882
     ip84c02 |    1.076637    .0455126      1.75    0.081      .9910297      1.16964
     ip84c03 |    1.119801     .031656      4.00    0.000      1.059444     1.183597
     ip84c04 |    1.096329    .0375836      2.68    0.007      1.025087     1.172523
     ip85c00 |    1.130644    .0600522      2.31    0.021      1.018863     1.254689
     ip85c01 |    1.130395    .0516125      2.68    0.007      1.033631     1.236218
     ip85c02 |    1.076059    .0334849      2.36    0.018      1.012391     1.143731
     ip85c03 |    1.082084    .0280388      3.04    0.002      1.028501     1.138458
     ip85c04 |    1.086988    .0326399      2.78    0.005      1.024861      1.15288
       d1c95 |    .9902512    .0600392     -0.16    0.872      .8792994     1.115203
       d1c00 |    1.022231    .0316755      0.71    0.478      .9619956     1.086238
       d2c95 |     1.05095    .0856074      0.61    0.542      .8958716     1.232874
       d2c00 |    1.051757    .0842188      0.63    0.529      .8989928     1.230481
-------------+----------------------------------------------------------------
Wald chi2(239) =  8.1e+15                                Prob > chi2 =   0.0000

.  * Column 4: Volume fixed effects and age profile;
. xtpqml cit ip* ia1j* ia2j* d1c* d2c*, i(volume) irr fe cluster(journal);
note: 2 groups (47 obs) dropped because of all zero outcomes

Iteration 0:   log likelihood = -88353.951
Iteration 1:   log likelihood = -58343.546
Iteration 2:   log likelihood = -55941.921
Iteration 3:   log likelihood = -55851.498
Iteration 4:   log likelihood =  -55850.55
Iteration 5:   log likelihood = -55850.509
Iteration 6:   log likelihood = -55850.509

Conditional fixed-effects Poisson regression    Number of obs     =     18,394
Group variable: volume                          Number of groups  =        756

                                                Obs per group:
                                                              min =         21
                                                              avg =       24.3
                                                              max =         26

                                                Wald chi2(411)    =   48972.56
Log likelihood  = -55850.509                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip76c80 |    .7903719    .0428357     18.45    0.000      .7064155     .8743283
     ip76c81 |    .8035565    .0430376     18.67    0.000      .7192044     .8879085
     ip76c82 |    .7630633    .0434577     17.56    0.000      .6778878     .8482387
     ip76c83 |    .7719066    .0436269     17.69    0.000      .6863994     .8574139
     ip76c84 |    .7124197    .0440462     16.17    0.000      .6260907     .7987486
     ip76c85 |    .6834155    .0442747     15.44    0.000      .5966387     .7701923
     ip76c86 |    .6139707    .0446238     13.76    0.000      .5265097     .7014317
     ip76c87 |    .5471746    .0448999     12.19    0.000      .4591725     .6351767
     ip76c88 |    .4470948    .0452875      9.87    0.000      .3583329     .5358566
     ip76c89 |    .4040918     .045314      8.92    0.000       .315278     .4929057
     ip76c90 |    .4409803     .044829      9.84    0.000      .3531171     .5288434
     ip76c91 |    .3192078    .0451453      7.07    0.000      .2307246     .4076909
     ip76c92 |    .2436287    .0451654      5.39    0.000      .1551062     .3321513
     ip76c93 |    .2052613    .0449006      4.57    0.000      .1172577      .293265
     ip76c94 |    .1145812    .0449476      2.55    0.011      .0264855      .202677
     ip76c95 |    .1558883    .0440264      3.54    0.000      .0695981     .2421785
     ip76c96 |    .1823616    .0432658      4.21    0.000      .0975622     .2671609
     ip76c97 |     .056132    .0433742      1.29    0.196     -.0288799     .1411439
     ip76c98 |    .1091714     .042243      2.58    0.010      .0263766     .1919662
     ip76c99 |     .089481    .0416809      2.15    0.032      .0077878     .1711741
     ip77c80 |    .7132317    .0391536     18.22    0.000      .6364921     .7899713
     ip77c81 |    .7398022    .0391843     18.88    0.000      .6630025      .816602
     ip77c82 |    .6885306    .0395901     17.39    0.000      .6109354     .7661259
     ip77c83 |    .7016172    .0396905     17.68    0.000      .6238252     .7794093
     ip77c84 |    .6850701    .0399049     17.17    0.000       .606858     .7632822
     ip77c85 |    .6532851    .0401512     16.27    0.000      .5745902       .73198
     ip77c86 |    .5850479    .0405193     14.44    0.000      .5056314     .6644643
     ip77c87 |    .5251247    .0408004     12.87    0.000      .4451574     .6050921
     ip77c88 |    .4330465    .0411925     10.51    0.000      .3523107     .5137823
     ip77c89 |    .3947955    .0412517      9.57    0.000      .3139436     .4756474
     ip77c90 |    .3330539    .0413749      8.05    0.000      .2519605     .4141474
     ip77c91 |    .2613984    .0415005      6.30    0.000       .180059     .3427378
     ip77c92 |    .1694218    .0417085      4.06    0.000      .0876747     .2511688
     ip77c93 |    .1390158    .0414823      3.35    0.001      .0577119     .2203197
     ip77c94 |    .0859725     .041355      2.08    0.038      .0049182     .1670267
     ip77c95 |    .0712879    .0409204      1.74    0.081     -.0089147     .1514904
     ip77c96 |    .0963526    .0402944      2.39    0.017      .0173771     .1753281
     ip77c97 |    .0394498    .0399466      0.99    0.323     -.0388441     .1177437
     ip77c98 |   -.0216303    .0397773     -0.54    0.587     -.0995923     .0563318
     ip77c99 |   -.0096743    .0390759     -0.25    0.804     -.0862616     .0669129
     ip78c80 |    .7273116    .0401946     18.09    0.000      .6485315     .8060916
     ip78c81 |    .8903427    .0393837     22.61    0.000      .8131521     .9675333
     ip78c82 |    .8386058    .0396803     21.13    0.000      .7608338     .9163777
     ip78c83 |    .8882124    .0395434     22.46    0.000      .8107087     .9657161
     ip78c84 |    .8544907    .0397855     21.48    0.000      .7765126     .9324688
     ip78c85 |    .8332309    .0399611     20.85    0.000      .7549086     .9115532
     ip78c86 |    .7465192    .0404007     18.48    0.000      .6673352     .8257031
     ip78c87 |    .6706566    .0407655     16.45    0.000      .5907577     .7505556
     ip78c88 |    .6194563    .0409727     15.12    0.000      .5391514     .6997613
     ip78c89 |    .5322432    .0413151     12.88    0.000      .4512672     .6132193
     ip78c90 |    .5010163    .0413178     12.13    0.000      .4200348     .5819978
     ip78c91 |    .4140415    .0415686      9.96    0.000      .3325685     .4955144
     ip78c92 |    .3383231    .0417193      8.11    0.000      .2565549     .4200914
     ip78c93 |    .2813991    .0417163      6.75    0.000      .1996367     .3631615
     ip78c94 |    .2323242    .0416215      5.58    0.000      .1507476     .3139008
     ip78c95 |    .2148071    .0412767      5.20    0.000      .1339061      .295708
     ip78c96 |    .2300988    .0408148      5.64    0.000      .1501032     .3100944
     ip78c97 |    .1152085    .0409311      2.81    0.005      .0349851     .1954319
     ip78c98 |    .1592511    .0400649      3.97    0.000      .0807253     .2377769
     ip78c99 |    .0770374    .0401496      1.92    0.055     -.0016544     .1557291
     ip79c80 |   -.1128589    .0393054     -2.87    0.004     -.1898962    -.0358217
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ia1journal54 |    .0491422      .00928      5.30    0.000      .0309537     .0673306
ia1journal55 |    .0451981    .0067588      6.69    0.000      .0319511     .0584452
ia1journal56 |    .1396808    .0125238     11.15    0.000      .1151345      .164227
ia1journal57 |    .0236642    .0153059      1.55    0.122     -.0063348     .0536633
ia1journal58 |    .0396371     .005005      7.92    0.000      .0298274     .0494467
ia1journal59 |    .0199859     .009551      2.09    0.036      .0012662     .0387056
ia1journal60 |     .002637    .0042614      0.62    0.536     -.0057151     .0109891
ia1journal61 |    .0121992    .0211829      0.58    0.565     -.0293186     .0537169
ia1journal62 |    .0120913    .0070761      1.71    0.087     -.0017777     .0259602
ia1journal63 |   -.0006948    .0223255     -0.03    0.975      -.044452     .0430624
ia1journal64 |    .1084719     .006268     17.31    0.000       .096187     .1207569
ia1journal65 |    .0778839    .0230323      3.38    0.001      .0327415     .1230263
ia1journal66 |     .031125    .0133898      2.32    0.020      .0048815     .0573685
ia1journal67 |    .0629259    .0059302     10.61    0.000      .0513029     .0745489
ia1journal68 |    .0197696    .0046572      4.24    0.000      .0106416     .0288975
ia1journal69 |    .0448875    .0056653      7.92    0.000      .0337838     .0559912
ia1journal70 |    .0942415    .0378809      2.49    0.013      .0199962     .1684867
ia1journal71 |    .0297863    .0060756      4.90    0.000      .0178783     .0416942
ia1journal72 |    .0249486    .0113429      2.20    0.028      .0027169     .0471803
ia1journal73 |    .0252806    .0074763      3.38    0.001      .0106273     .0399339
ia1journal74 |   -.0562435    .0085669     -6.57    0.000     -.0730343    -.0394526
ia1journal75 |   -.2604877     .092202     -2.83    0.005     -.4412004    -.0797751
ia1journal76 |    .1340772    .0139098      9.64    0.000      .1068144     .1613399
ia1journal77 |    .0110936    .0147721      0.75    0.453     -.0178592     .0400463
ia1journal78 |   -.0466649    .0117968     -3.96    0.000     -.0697863    -.0235436
ia1journal79 |   -.0032658    .0086565     -0.38    0.706     -.0202323     .0137007
ia1journal80 |   -.0451101    .0141496     -3.19    0.001     -.0728428    -.0173774
ia1journal81 |    -.046056    .0190696     -2.42    0.016     -.0834317    -.0086803
ia1journal82 |   -.0085161    .0057513     -1.48    0.139     -.0197885     .0027564
ia1journal83 |   -.1122066    .0191823     -5.85    0.000     -.1498031      -.07461
ia1journal84 |    .0020576    .0214494      0.10    0.924     -.0399824     .0440976
ia1journal85 |   -.0062452    .0176191     -0.35    0.723     -.0407781     .0282876
ia1journal86 |    .0413806    .0155398      2.66    0.008      .0109232      .071838
ia1journal87 |   -.0503775    .0110871     -4.54    0.000     -.0721079    -.0286471
 ia2journal2 |   -.0015383    .0001258    -12.23    0.000     -.0017848    -.0012917
 ia2journal3 |   -.0004081    .0001929     -2.12    0.034     -.0007861    -.0000301
 ia2journal4 |   -.0011341    .0001997     -5.68    0.000     -.0015255    -.0007428
 ia2journal5 |   -.0015282    .0001394    -10.96    0.000     -.0018014     -.001255
 ia2journal6 |     .001086    .0003373      3.22    0.001      .0004249     .0017471
 ia2journal7 |   -.0021511    .0004226     -5.09    0.000     -.0029794    -.0013229
 ia2journal8 |    .0018682    .0003698      5.05    0.000      .0011434      .002593
 ia2journal9 |   -.0004899    .0002257     -2.17    0.030     -.0009324    -.0000475
ia2journal10 |   -.0006644    .0001998     -3.33    0.001     -.0010559    -.0002728
ia2journal11 |   -.0001473    .0002883     -0.51    0.609     -.0007123     .0004177
ia2journal12 |   -.0003833     .000169     -2.27    0.023     -.0007145    -.0000521
ia2journal13 |   -.0022352    .0003667     -6.10    0.000     -.0029539    -.0015166
ia2journal14 |   -.0010865    .0002998     -3.62    0.000     -.0016741    -.0004988
ia2journal15 |    .0018683    .0004644      4.02    0.000       .000958     .0027786
ia2journal16 |      .00012    .0003404      0.35    0.724     -.0005471     .0007871
ia2journal17 |   -.0070164    .0010406     -6.74    0.000     -.0090558    -.0049769
ia2journal18 |   -.0022186    .0001763    -12.59    0.000     -.0025641    -.0018732
ia2journal19 |   -.0019719     .000646     -3.05    0.002     -.0032381    -.0007057
ia2journal20 |     .000289    .0002588      1.12    0.264     -.0002183     .0007964
ia2journal21 |    .0005292    .0003607      1.47    0.142     -.0001777     .0012361
ia2journal22 |   -.0025826    .0001924    -13.42    0.000     -.0029596    -.0022055
ia2journal23 |   -.0022264    .0003444     -6.46    0.000     -.0029015    -.0015513
ia2journal24 |   -.0021625    .0001607    -13.46    0.000     -.0024774    -.0018476
ia2journal25 |   -.0031588    .0004368     -7.23    0.000      -.004015    -.0023026
ia2journal26 |   -.0003674    .0006112     -0.60    0.548     -.0015653     .0008305
ia2journal27 |   -.0031563    .0003618     -8.72    0.000     -.0038655    -.0024471
ia2journal28 |   -.0021404     .000158    -13.55    0.000       -.00245    -.0018308
ia2journal29 |   -.0045422    .0003724    -12.20    0.000     -.0052721    -.0038122
ia2journal30 |   -.0014286    .0003912     -3.65    0.000     -.0021953    -.0006619
ia2journal31 |   -.0008794    .0001964     -4.48    0.000     -.0012643    -.0004945
ia2journal32 |   -.0017773    .0002957     -6.01    0.000     -.0023569    -.0011977
ia2journal33 |    .0012754    .0004885      2.61    0.009      .0003179     .0022329
ia2journal34 |   -.0001059    .0004317     -0.25    0.806      -.000952     .0007402
ia2journal35 |    .0001493    .0008299      0.18    0.857     -.0014773     .0017759
ia2journal36 |    .0000385    .0012233      0.03    0.975     -.0023591     .0024362
ia2journal37 |   -.0013355    .0004986     -2.68    0.007     -.0023127    -.0003583
ia2journal38 |   -.0014732    .0004891     -3.01    0.003     -.0024319    -.0005145
ia2journal39 |   -.0009824    .0007542     -1.30    0.193     -.0024607     .0004958
ia2journal40 |   -.0003034    .0003034     -1.00    0.317     -.0008981     .0002913
ia2journal41 |     .000922    .0009978      0.92    0.355     -.0010336     .0028777
ia2journal42 |   -.0007747    .0003867     -2.00    0.045     -.0015327    -.0000167
ia2journal43 |    .0012378    .0005118      2.42    0.016      .0002347     .0022408
ia2journal44 |    .0094947    .0022515      4.22    0.000      .0050819     .0139075
ia2journal45 |   -.0008374    .0002486     -3.37    0.001     -.0013246    -.0003502
ia2journal46 |   -.0013855    .0005529     -2.51    0.012     -.0024691    -.0003018
ia2journal47 |   -.0014018    .0007403     -1.89    0.058     -.0028527     .0000491
ia2journal48 |   -.0004916    .0014947     -0.33    0.742     -.0034212      .002438
ia2journal49 |   -.0014593    .0004176     -3.49    0.000     -.0022778    -.0006408
ia2journal50 |    .0018321    .0007895      2.32    0.020      .0002847     .0033796
ia2journal51 |   -.0013198    .0008244     -1.60    0.109     -.0029356     .0002959
ia2journal52 |    -.001034    .0011951     -0.87    0.387     -.0033763     .0013082
ia2journal53 |   -.0022348    .0014142     -1.58    0.114     -.0050067      .000537
ia2journal54 |   -.0019923    .0003614     -5.51    0.000     -.0027007    -.0012838
ia2journal55 |   -.0009662    .0002711     -3.56    0.000     -.0014976    -.0004348
ia2journal56 |   -.0028473    .0004621     -6.16    0.000     -.0037531    -.0019416
ia2journal57 |   -.0017885    .0006385     -2.80    0.005       -.00304    -.0005369
ia2journal58 |   -.0006315    .0001804     -3.50    0.000      -.000985     -.000278
ia2journal59 |   -.0002903      .00035     -0.83    0.407     -.0009763     .0003956
ia2journal60 |    .0009362    .0001515      6.18    0.000      .0006392     .0012332
ia2journal61 |   -.0009237    .0009727     -0.95    0.342     -.0028303     .0009828
ia2journal62 |   -.0008852    .0002774     -3.19    0.001     -.0014289    -.0003414
ia2journal63 |   -.0021403    .0010668     -2.01    0.045     -.0042312    -.0000494
ia2journal64 |    -.002394    .0002225    -10.76    0.000     -.0028302    -.0019579
ia2journal65 |   -.0034489    .0010517     -3.28    0.001     -.0055102    -.0013877
ia2journal66 |   -.0008362    .0005205     -1.61    0.108     -.0018564     .0001839
ia2journal67 |   -.0017316    .0002257     -7.67    0.000      -.002174    -.0012892
ia2journal68 |    .0005172    .0001685      3.07    0.002       .000187     .0008474
ia2journal69 |   -.0024616    .0002248    -10.95    0.000     -.0029021     -.002021
ia2journal70 |   -.0036793    .0017133     -2.15    0.032     -.0070373    -.0003213
ia2journal71 |   -.0008394    .0002253     -3.73    0.000      -.001281    -.0003979
ia2journal72 |   -.0005179    .0004257     -1.22    0.224     -.0013522     .0003163
ia2journal73 |   -.0012071    .0002841     -4.25    0.000     -.0017639    -.0006503
ia2journal74 |     .001526    .0003343      4.57    0.000      .0008708     .0021811
ia2journal75 |   -.0056206    .0069027     -0.81    0.416     -.0191497     .0079085
ia2journal76 |   -.0039829    .0005119     -7.78    0.000     -.0049862    -.0029796
ia2journal77 |   -.0004021    .0005597     -0.72    0.473      -.001499     .0006949
ia2journal78 |    .0002244    .0004786      0.47    0.639     -.0007136     .0011624
ia2journal79 |   -.0013669    .0003543     -3.86    0.000     -.0020613    -.0006724
ia2journal80 |    .0006295    .0005514      1.14    0.254     -.0004512     .0017102
ia2journal81 |    .0018392    .0007191      2.56    0.011      .0004298     .0032486
ia2journal82 |   -.0006637    .0002254     -2.94    0.003     -.0011055    -.0002218
ia2journal83 |    .0031579    .0007698      4.10    0.000      .0016492     .0046666
ia2journal84 |   -.0007777     .000944     -0.82    0.410      -.002628     .0010725
ia2journal85 |   -.0023984    .0008315     -2.88    0.004     -.0040281    -.0007686
ia2journal86 |   -.0009091    .0006379     -1.43    0.154     -.0021594     .0003412
ia2journal87 |    .0004627    .0004211      1.10    0.272     -.0003626      .001288
       d1c95 |   -.0091057    .0117288     -0.78    0.438     -.0320938     .0138823
       d1c00 |   -.0061029    .0120786     -0.51    0.613     -.0297765     .0175707
       d2c95 |    .0034188    .0092071      0.37    0.710     -.0146268     .0214644
       d2c00 |    .0005969     .010757      0.06    0.956     -.0204865     .0216803
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     ip76c80 |    2.204216    .2877358      6.05    0.000       1.70663     2.846879
     ip76c81 |     2.23347    .2531978      7.09    0.000      1.788478     2.789181
     ip76c82 |    2.144836    .2331481      7.02    0.000      1.733272     2.654126
     ip76c83 |    2.163888    .2234507      7.48    0.000      1.767408      2.64931
     ip76c84 |    2.038919    .1904891      7.63    0.000      1.697755     2.448639
     ip76c85 |    1.980631    .1719016      7.87    0.000      1.670809     2.347905
     ip76c86 |    1.847754    .1560261      7.27    0.000      1.565914     2.180321
     ip76c87 |    1.728363     .127142      7.44    0.000        1.4963     1.996416
     ip76c88 |    1.563762    .1020243      6.85    0.000      1.376056     1.777074
     ip76c89 |    1.497942    .0995472      6.08    0.000      1.315005     1.706327
     ip76c90 |     1.55423    .0841976      8.14    0.000      1.397665     1.728334
     ip76c91 |    1.376037    .0834815      5.26    0.000       1.22177     1.549783
     ip76c92 |    1.275871    .0571493      5.44    0.000      1.168636     1.392945
     ip76c93 |    1.227846    .0664734      3.79    0.000      1.104235     1.365295
     ip76c94 |    1.121404    .0712316      1.80    0.071      .9901332     1.270078
     ip76c95 |    1.168696     .074808      2.44    0.015      1.030899     1.324911
     ip76c96 |    1.200048    .0617964      3.54    0.000      1.084841      1.32749
     ip76c97 |    1.057737    .0587095      1.01    0.312      .9487069     1.179298
     ip76c98 |    1.115354    .0469644      2.59    0.010      1.027001     1.211307
     ip76c99 |    1.093607    .0604921      1.62    0.106      .9812451     1.218834
     ip77c80 |    2.040575    .2401071      6.06    0.000      1.620297     2.569866
     ip77c81 |    2.095521    .1955848      7.93    0.000      1.745201     2.516162
     ip77c82 |    1.990788    .1893134      7.24    0.000      1.652267     2.398666
     ip77c83 |    2.017012    .1851666      7.64    0.000      1.684869     2.414632
     ip77c84 |    1.983911    .1719299      7.91    0.000      1.673999     2.351197
     ip77c85 |    1.921844    .1455059      8.63    0.000      1.656808     2.229277
     ip77c86 |    1.795077    .1563372      6.72    0.000      1.513387     2.129198
     ip77c87 |     1.69067    .1163574      7.63    0.000      1.477326     1.934823
     ip77c88 |    1.541948     .097049      6.88    0.000         1.363      1.74439
     ip77c89 |    1.484081    .0936828      6.25    0.000       1.31137     1.679538
     ip77c90 |    1.395223    .0910025      5.11    0.000      1.227791     1.585487
     ip77c91 |    1.298745    .0796879      4.26    0.000      1.151585      1.46471
     ip77c92 |     1.18462    .0865755      2.32    0.020      1.026528     1.367059
     ip77c93 |    1.149142    .0776204      2.06    0.040      1.006649     1.311805
     ip77c94 |    1.089776    .0660062      1.42    0.156      .9677904     1.227138
     ip77c95 |     1.07389     .062849      1.22    0.223      .9575108     1.204415
     ip77c96 |    1.101147    .0694223      1.53    0.126      .9731528     1.245976
     ip77c97 |    1.040238     .062917      0.65    0.514      .9239519      1.17116
     ip77c98 |     .978602    .0531078     -0.40    0.690      .8798572     1.088429
     ip77c99 |    .9903723    .0537828     -0.18    0.859       .890376     1.101599
     ip78c80 |    2.069509    .1571291      9.58    0.000      1.783361     2.401572
     ip78c81 |    2.435964    .2148517     10.09    0.000      2.049251     2.895655
     ip78c82 |     2.31314    .1825812     10.62    0.000      1.981594     2.700157
     ip78c83 |     2.43078     .213435     10.12    0.000      2.046472     2.887258
     ip78c84 |    2.350177    .1773967     11.32    0.000      2.026982     2.724904
     ip78c85 |     2.30074    .1941215      9.88    0.000      1.950063     2.714479
     ip78c86 |    2.109644    .1631539      9.65    0.000      1.812924     2.454928
     ip78c87 |    1.955521    .1454534      9.02    0.000      1.690244     2.262432
     ip78c88 |    1.857918    .1425992      8.07    0.000      1.598435     2.159524
     ip78c89 |    1.702748    .1334401      6.79    0.000      1.460306      1.98544
     ip78c90 |    1.650398    .1258229      6.57    0.000      1.421329     1.916384
     ip78c91 |     1.51292    .0957425      6.54    0.000      1.336439     1.712706
     ip78c92 |    1.402594    .0858567      5.53    0.000       1.24402      1.58138
     ip78c93 |    1.324982    .0920157      4.05    0.000       1.15637      1.51818
     ip78c94 |    1.261529    .0849013      3.45    0.001      1.105633     1.439406
     ip78c95 |    1.239623     .087246      3.05    0.002      1.079894     1.422977
     ip78c96 |    1.258724    .0698129      4.15    0.000      1.129068     1.403269
     ip78c97 |    1.122107    .0728473      1.77    0.076      .9880396     1.274367
     ip78c98 |    1.172632    .0740878      2.52    0.012      1.036054     1.327216
     ip78c99 |    1.080082    .0590345      1.41    0.159       .970359     1.202213
     ip79c80 |    .8932767    .0838087     -1.20    0.229      .7432327     1.073611
     ip79c81 |     1.44252     .151643      3.49    0.000      1.173925     1.772569
     ip79c82 |    1.722631     .169961      5.51    0.000      1.419743     2.090138
     ip79c83 |    1.807464    .1705233      6.27    0.000      1.502325      2.17458
     ip79c84 |    1.749704    .1743038      5.62    0.000      1.439358     2.126966
     ip79c85 |    1.727613    .1608726      5.87    0.000      1.439408     2.073524
     ip79c86 |    1.625983    .1477888      5.35    0.000      1.360657     1.943048
     ip79c87 |     1.54545     .130492      5.16    0.000      1.309733      1.82359
     ip79c88 |    1.458216    .1354324      4.06    0.000      1.215531     1.749353
     ip79c89 |    1.374742    .1233758      3.55    0.000      1.153003     1.639125
     ip79c90 |       1.364     .115006      3.68    0.000      1.156232     1.609102
     ip79c91 |    1.253561    .0998942      2.84    0.005      1.072296     1.465468
     ip79c92 |    1.196523    .0857979      2.50    0.012      1.039644     1.377074
     ip79c93 |    1.150704    .0849765      1.90    0.057      .9956449     1.329911
     ip79c94 |    1.115569    .0745305      1.64    0.102      .9786521     1.271642
     ip79c95 |    1.112651    .0720498      1.65    0.099      .9800298     1.263219
     ip79c96 |    1.113526    .0680037      1.76    0.078      .9879091     1.255116
     ip79c97 |    1.025736    .0633467      0.41    0.681      .9087989      1.15772
     ip79c98 |    .9971678    .0500472     -0.06    0.955      .9037473     1.100245
     ip79c99 |    1.025732    .0502272      0.52    0.604      .9318651     1.129054
     ip80c80 |    .2261474    .0218782    -15.37    0.000      .1870871     .2733628
     ip80c81 |    .9893207    .0555177     -0.19    0.848      .8862785     1.104343
     ip80c82 |    1.693585    .0877441     10.17    0.000      1.530054     1.874596
     ip80c83 |    2.114035    .1309949     12.08    0.000      1.872268     2.387022
     ip80c84 |    1.973767    .1180141     11.37    0.000      1.755502     2.219168
     ip80c85 |    2.041119    .1360299     10.71    0.000      1.791184     2.325929
     ip80c86 |    1.910884    .1228601     10.07    0.000      1.684637     2.167516
     ip80c87 |    1.776868     .129517      7.89    0.000      1.540318     2.049744
     ip80c88 |    1.698959    .1066122      8.45    0.000      1.502342     1.921308
     ip80c89 |    1.620567    .0919562      8.51    0.000      1.449997     1.811202
     ip80c90 |    1.544469    .0916196      7.33    0.000      1.374944     1.734896
     ip80c91 |    1.525595     .072311      8.91    0.000      1.390252     1.674114
     ip80c92 |     1.38412    .0674804      6.67    0.000      1.257983     1.522904
     ip80c93 |    1.331356    .0586576      6.50    0.000      1.221213     1.451432
     ip80c94 |    1.244804    .0565182      4.82    0.000      1.138816     1.360656
     ip80c95 |    1.220396    .0599481      4.05    0.000      1.108379     1.343734
     ip80c96 |    1.215905    .0526004      4.52    0.000       1.11706     1.323497
     ip80c97 |    1.141098    .0495857      3.04    0.002      1.047935     1.242543
     ip80c98 |    1.130802    .0448581      3.10    0.002      1.046212      1.22223
     ip80c99 |    1.121373    .0448572      2.86    0.004      1.036813      1.21283
     ip81c81 |    .2105931    .0258029    -12.71    0.000      .1656344      .267755
     ip81c82 |    .9648199    .0830343     -0.42    0.677      .8150612     1.142095
     ip81c83 |    1.759333    .1433898      6.93    0.000      1.499592     2.064063
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 ia2journal2 |    .9984629    .0000533    -28.82    0.000      .9983585     .9985674
 ia2journal3 |     .999592      .00006     -6.80    0.000      .9994744     .9997095
 ia2journal4 |    .9988665    .0000333    -34.07    0.000      .9988013     .9989317
 ia2journal5 |     .998473    .0000238    -64.04    0.000      .9984263     .9985197
 ia2journal6 |    1.001087    .0000613     17.73    0.000      1.000966     1.001207
 ia2journal7 |    .9978512    .0000442    -48.59    0.000      .9977646     .9979378
 ia2journal8 |     1.00187    .0000311     60.22    0.000      1.001809     1.001931
 ia2journal9 |    .9995102    .0000465    -10.53    0.000      .9994191     .9996014
ia2journal10 |    .9993359    .0000282    -23.53    0.000      .9992806     .9993912
ia2journal11 |    .9998527    .0000493     -2.99    0.003      .9997561     .9999494
ia2journal12 |    .9996168    .0000264    -14.50    0.000       .999565     .9996686
ia2journal13 |    .9977673    .0000404    -55.17    0.000       .997688     .9978465
ia2journal14 |    .9989141    .0000552    -19.67    0.000       .998806     .9990223
ia2journal15 |     1.00187    .0000323     58.01    0.000      1.001807     1.001933
ia2journal16 |     1.00012    .0000567      2.12    0.034      1.000009     1.000231
ia2journal17 |    .9930082    .0000757    -92.04    0.000      .9928598     .9931566
ia2journal18 |    .9977838    .0000462    -47.88    0.000      .9976932     .9978745
ia2journal19 |      .99803    .0001667    -11.81    0.000      .9977034     .9983568
ia2journal20 |    1.000289    .0000725      3.99    0.000      1.000147     1.000431
ia2journal21 |    1.000529    .0000382     13.85    0.000      1.000454     1.000604
ia2journal22 |    .9974208    .0000451    -57.15    0.000      .9973324     .9975091
ia2journal23 |     .997776    .0001725    -12.87    0.000      .9974379     .9981143
ia2journal24 |    .9978399    .0000542    -39.83    0.000      .9977337      .997946
ia2journal25 |    .9968462    .0000426    -73.95    0.000      .9967627     .9969297
ia2journal26 |    .9996326    .0000452     -8.13    0.000      .9995441     .9997212
ia2journal27 |    .9968486    .0000413    -76.10    0.000      .9967676     .9969297
ia2journal28 |    .9978619    .0000354    -60.39    0.000      .9977926     .9979312
ia2journal29 |    .9954681    .0001063    -42.54    0.000      .9952598     .9956765
ia2journal30 |    .9985724    .0000546    -26.13    0.000      .9984654     .9986794
ia2journal31 |     .999121    .0000363    -24.21    0.000      .9990499     .9991921
ia2journal32 |    .9982243    .0000334    -53.16    0.000      .9981589     .9982897
ia2journal33 |    1.001276     .000036     35.47    0.000      1.001206     1.001347
ia2journal34 |    .9998941    .0000555     -1.91    0.057      .9997853     1.000003
ia2journal35 |    1.000149    .0001132      1.32    0.187      .9999275     1.000371
ia2journal36 |    1.000039    .0000405      0.95    0.341      .9999592     1.000118
ia2journal37 |    .9986654    .0000614    -21.74    0.000      .9985451     .9987857
ia2journal38 |    .9985279    .0001227    -11.99    0.000      .9982874     .9987684
ia2journal39 |    .9990181     .000108     -9.09    0.000      .9988064     .9992298
ia2journal40 |    .9996966    .0000671     -4.52    0.000       .999565     .9998282
ia2journal41 |    1.000922    .0000481     19.20    0.000      1.000828     1.001017
ia2journal42 |    .9992256    .0000312    -24.80    0.000      .9991644     .9992868
ia2journal43 |    1.001239    .0000365     33.97    0.000      1.001167      1.00131
ia2journal44 |     1.00954    .0002356     40.68    0.000      1.009078     1.010002
ia2journal45 |    .9991629    .0000669    -12.51    0.000      .9990319      .999294
ia2journal46 |    .9986155    .0000624    -22.18    0.000      .9984932     .9987377
ia2journal47 |    .9985992     .000139    -10.07    0.000      .9983268     .9988717
ia2journal48 |    .9995085    .0001966     -2.50    0.012      .9991232      .999894
ia2journal49 |    .9985418    .0000452    -32.23    0.000      .9984531     .9986304
ia2journal50 |    1.001834    .0000616     29.77    0.000      1.001713     1.001955
ia2journal51 |     .998681    .0001195    -11.03    0.000      .9984468     .9989153
ia2journal52 |    .9989665      .00024     -4.30    0.000      .9984962      .999437
ia2journal53 |    .9977677    .0001456    -15.32    0.000      .9974824     .9980531
ia2journal54 |    .9980097    .0000291    -68.27    0.000      .9979526     .9980668
ia2journal55 |    .9990342    .0001081     -8.93    0.000      .9988223     .9992462
ia2journal56 |    .9971567    .0001158    -24.53    0.000      .9969298     .9973836
ia2journal57 |    .9982131    .0001566    -11.40    0.000      .9979063     .9985201
ia2journal58 |    .9993687    .0000496    -12.72    0.000      .9992714     .9994659
ia2journal59 |    .9997097    .0000641     -4.53    0.000      .9995841     .9998353
ia2journal60 |    1.000937    .0000929     10.08    0.000      1.000755     1.001119
ia2journal61 |    .9990767    .0001626     -5.68    0.000      .9987581     .9993954
ia2journal62 |    .9991152    .0000478    -18.50    0.000      .9990215     .9992089
ia2journal63 |    .9978619    .0001745    -12.24    0.000      .9975201     .9982039
ia2journal64 |    .9976088    .0000752    -31.77    0.000      .9974615     .9977562
ia2journal65 |     .996557    .0001913    -17.97    0.000      .9961822      .996932
ia2journal66 |    .9991641    .0000375    -22.30    0.000      .9990907     .9992376
ia2journal67 |    .9982699     .000047    -36.75    0.000      .9981777     .9983621
ia2journal68 |    1.000517    .0000387     13.38    0.000      1.000442     1.000593
ia2journal69 |    .9975415    .0000492    -49.88    0.000       .997445      .997638
ia2journal70 |    .9963275    .0001965    -18.65    0.000      .9959423     .9967127
ia2journal71 |    .9991609    .0000461    -18.19    0.000      .9990706     .9992513
ia2journal72 |    .9994822     .000036    -14.39    0.000      .9994117     .9995527
ia2journal73 |    .9987936     .000032    -37.70    0.000       .998731     .9988563
ia2journal74 |    1.001527    .0000404     37.83    0.000      1.001448     1.001606
ia2journal75 |    .9943952    .0004145    -13.48    0.000      .9935832     .9952079
ia2journal76 |     .996025    .0000489    -81.05    0.000      .9959291      .996121
ia2journal77 |     .999598    .0000978     -4.11    0.000      .9994063     .9997898
ia2journal78 |    1.000224    .0000299      7.52    0.000      1.000166     1.000283
ia2journal79 |    .9986341    .0000681    -20.06    0.000      .9985007     .9987675
ia2journal80 |     1.00063    .0000434     14.51    0.000      1.000545     1.000715
ia2journal81 |    1.001841    .0000636     28.96    0.000      1.001716     1.001966
ia2journal82 |    .9993365    .0000405    -16.38    0.000      .9992572     .9994159
ia2journal83 |    1.003163    .0000558     56.81    0.000      1.003054     1.003272
ia2journal84 |    .9992226    .0001059     -7.34    0.000       .999015     .9994301
ia2journal85 |    .9976045    .0001329    -18.01    0.000      .9973441      .997865
ia2journal86 |    .9990913    .0000932     -9.74    0.000      .9989086      .999274
ia2journal87 |    1.000463    .0000925      5.00    0.000      1.000281     1.000644
       d1c95 |    .9909356    .0237898     -0.38    0.704      .9453884     1.038677
       d1c00 |    .9939157    .0128232     -0.47    0.636      .9690978     1.019369
       d2c95 |    1.003425    .0172175      0.20    0.842        .97024     1.037744
       d2c00 |    1.000597    .0176682      0.03    0.973      .9665605     1.035832
-------------+----------------------------------------------------------------
Wald chi2(411) =  3.8e+18                                Prob > chi2 =   0.0000

.  * Column 5: Evans replication, with journal volume fixed effects, citation lags;
. xtpqml cit cit_lag d1c* d2c*, i(volume) irr fe cluster(journal);
note: 3 groups (65 obs) dropped because of all zero outcomes

Iteration 0:   log likelihood = -73265.048
Iteration 1:   log likelihood = -63146.417
Iteration 2:   log likelihood = -63101.173
Iteration 3:   log likelihood =  -63101.17

Conditional fixed-effects Poisson regression    Number of obs     =     17,618
Group variable: volume                          Number of groups  =        755

                                                Obs per group:
                                                              min =         20
                                                              avg =       23.3
                                                              max =         25

                                                Wald chi2(5)      =   18778.63
Log likelihood  =  -63101.17                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     cit_lag |    .0037288    .0000317    117.80    0.000      .0036667     .0037908
       d1c95 |   -.1223706    .0099575    -12.29    0.000      -.141887    -.1028543
       d1c00 |   -.1941915     .008252    -23.53    0.000      -.210365    -.1780179
       d2c95 |   -.1682259    .0070506    -23.86    0.000     -.1820449    -.1544069
       d2c00 |    -.210744    .0034304    -61.43    0.000     -.2174675    -.2040205
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     cit_lag |    1.003736    .0006407      5.84    0.000      1.002481     1.004992
       d1c95 |    .8848204    .0290173     -3.73    0.000      .8297367     .9435609
       d1c00 |    .8235002    .0226868     -7.05    0.000       .780214      .869188
       d2c95 |    .8451629    .0159445     -8.92    0.000       .814483     .8769984
       d2c00 |    .8099814    .0201498     -8.47    0.000      .7714358      .850453
-------------+----------------------------------------------------------------
Wald chi2(5) =   178.97                                Prob > chi2 =   0.0000

. * Column 6: Combine citation lags with journal volumen fixed effects,
> * time effects, and age profiles;
.   xtpqml cit cit_lag ip* ia1j* ia2j* d1c* d2c*, i(volume) irr fe cluster(journal);
note: 3 groups (65 obs) dropped because of all zero outcomes
note: ip76c80 dropped because of collinearity
note: ip77c80 dropped because of collinearity
note: ip78c80 dropped because of collinearity
note: ip79c80 dropped because of collinearity
note: ip80c80 dropped because of collinearity
note: ip81c81 dropped because of collinearity
note: ip82c82 dropped because of collinearity
note: ip83c83 dropped because of collinearity
note: ip84c84 dropped because of collinearity
note: ip85c85 dropped because of collinearity

Iteration 0:   log likelihood = -73265.048
Iteration 1:   log likelihood = -52481.374
Iteration 2:   log likelihood = -52032.764
Iteration 3:   log likelihood = -52026.066
Iteration 4:   log likelihood = -52024.667
Iteration 5:   log likelihood = -52024.553
Iteration 6:   log likelihood = -52024.552

Conditional fixed-effects Poisson regression    Number of obs     =     17,618
Group variable: volume                          Number of groups  =        755

                                                Obs per group:
                                                              min =         20
                                                              avg =       23.3
                                                              max =         25

                                                Wald chi2(402)    =   39053.58
Log likelihood  = -52024.552                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     cit_lag |     .002298    .0000475     48.34    0.000      .0022048     .0023912
     ip76c81 |    .4723827    .0435173     10.86    0.000      .3870904      .557675
     ip76c82 |    .4294986    .0439485      9.77    0.000      .3433611     .5156361
     ip76c83 |    .4460588    .0441276     10.11    0.000      .3595704     .5325472
     ip76c84 |     .381094    .0445691      8.55    0.000      .2937401     .4684479
     ip76c85 |    .3748358    .0447677      8.37    0.000      .2870927      .462579
     ip76c86 |    .3179048    .0451288      7.04    0.000       .229454     .4063557
     ip76c87 |    .2697579    .0453693      5.95    0.000      .1808357     .3586801
     ip76c88 |     .188898    .0457397      4.13    0.000      .0992498     .2785462
     ip76c89 |    .1689579    .0457346      3.69    0.000      .0793197     .2585961
     ip76c90 |    .2231323    .0452405      4.93    0.000      .1344625     .3118021
     ip76c91 |    .0987698    .0455741      2.17    0.030      .0094462     .1880934
     ip76c92 |    .0610803    .0455214      1.34    0.180       -.02814     .1503005
     ip76c93 |    .0395339    .0452369      0.87    0.382     -.0491287     .1281966
     ip76c94 |   -.0323978    .0452422     -0.72    0.474      -.121071     .0562753
     ip76c95 |    .0421029     .044278      0.95    0.342     -.0446804     .1288862
     ip76c96 |    .0577136    .0435194      1.33    0.185     -.0275829     .1430102
     ip76c97 |   -.0512493    .0435931     -1.18    0.240     -.1366903     .0341916
     ip76c98 |    .0386951    .0424136      0.91    0.362     -.0444341     .1218243
     ip76c99 |    .0177907    .0418309      0.43    0.671     -.0641965     .0997778
     ip77c81 |    .3783322    .0396705      9.54    0.000      .3005794      .456085
     ip77c82 |     .332891    .0400485      8.31    0.000      .2543975     .4113845
     ip77c83 |    .3476184    .0401324      8.66    0.000      .2689603     .4262764
     ip77c84 |    .3331001    .0403755      8.25    0.000      .2539656     .4122347
     ip77c85 |    .3126918    .0405923      7.70    0.000      .2331322     .3922513
     ip77c86 |    .2513435    .0409607      6.14    0.000       .171062     .3316251
     ip77c87 |     .218608    .0411882      5.31    0.000      .1378806     .2993353
     ip77c88 |    .1508919    .0415431      3.63    0.000      .0694689     .2323148
     ip77c89 |    .1402821    .0415568      3.38    0.001      .0588323     .2217319
     ip77c90 |    .0855852    .0416555      2.05    0.040      .0039419     .1672285
     ip77c91 |    .0372917    .0417342      0.89    0.372     -.0445058     .1190892
     ip77c92 |   -.0305656    .0418991     -0.73    0.466     -.1126863     .0515551
     ip77c93 |   -.0274145    .0416373     -0.66    0.510     -.1090221     .0541931
     ip77c94 |   -.0655361    .0414816     -1.58    0.114     -.1468386     .0157664
     ip77c95 |   -.0595074    .0410139     -1.45    0.147     -.1398932     .0208784
     ip77c96 |   -.0209075    .0403638     -0.52    0.604     -.1000191     .0582041
     ip77c97 |   -.0735219    .0400257     -1.84    0.066     -.1519708      .004927
     ip77c98 |   -.1136198    .0398348     -2.85    0.004     -.1916946    -.0355451
     ip77c99 |   -.0793473    .0391155     -2.03    0.043     -.1560121    -.0026824
     ip78c81 |    .5775273    .0398361     14.50    0.000      .4994499     .6556046
     ip78c82 |    .4989997    .0401953     12.41    0.000      .4202184     .5777811
     ip78c83 |    .5558966    .0400346     13.89    0.000      .4774302     .6343631
     ip78c84 |    .5214716    .0402818     12.95    0.000      .4425208     .6004224
     ip78c85 |    .5055733    .0404527     12.50    0.000      .4262874     .5848592
     ip78c86 |    .4215087    .0409079     10.30    0.000      .3413307     .5016867
     ip78c87 |    .3703313    .0412012      8.99    0.000      .2895785     .4510841
     ip78c88 |    .3376511     .041369      8.16    0.000      .2565694     .4187329
     ip78c89 |    .2677163    .0416926      6.42    0.000      .1860002     .3494324
     ip78c90 |    .2546102    .0416672      6.11    0.000      .1729441     .3362763
     ip78c91 |     .186597    .0418826      4.46    0.000      .1045087     .2686853
     ip78c92 |    .1207128    .0420277      2.87    0.004      .0383401     .2030855
     ip78c93 |    .1005751    .0419526      2.40    0.017      .0183495     .1828007
     ip78c94 |    .0797785    .0418124      1.91    0.056     -.0021724     .1617293
     ip78c95 |    .0783162    .0414475      1.89    0.059     -.0029194     .1595518
     ip78c96 |    .1034751    .0409615      2.53    0.012      .0231921     .1837581
     ip78c97 |   -.0184863    .0411011     -0.45    0.653     -.0990431     .0620704
     ip78c98 |    .0709213    .0401689      1.77    0.077     -.0078084      .149651
     ip78c99 |   -.0085799    .0402456     -0.21    0.831     -.0874598        .0703
     ip79c81 |    .2986357    .0358414      8.33    0.000      .2283878     .3688835
     ip79c82 |    .4104331    .0347666     11.81    0.000      .3422918     .4785744
     ip79c83 |    .4112405     .034544     11.90    0.000      .3435355     .4789455
     ip79c84 |    .3668426    .0347061     10.57    0.000      .2988199     .4348653
     ip79c85 |    .3697335    .0347711     10.63    0.000      .3015833     .4378836
     ip79c86 |    .3011367     .035088      8.58    0.000      .2323656     .3699079
     ip79c87 |    .2645737    .0353149      7.49    0.000      .1953577     .3337896
     ip79c88 |    .2120629    .0355718      5.96    0.000      .1423435     .2817824
     ip79c89 |     .187289    .0357548      5.24    0.000      .1172108     .2573672
     ip79c90 |    .2012386    .0356667      5.64    0.000      .1313331      .271144
     ip79c91 |    .1125305    .0359325      3.13    0.002      .0421041     .1829569
     ip79c92 |    .0862858    .0359325      2.40    0.016      .0158594     .1567122
     ip79c93 |    .0548705    .0358511      1.53    0.126     -.0153965     .1251374
     ip79c94 |    .0546953    .0356463      1.53    0.125     -.0151701     .1245607
     ip79c95 |    .0538533    .0352399      1.53    0.126     -.0152155     .1229222
     ip79c96 |     .052845    .0349587      1.51    0.131     -.0156729     .1213628
     ip79c97 |   -.0207621     .034737     -0.60    0.550     -.0888453     .0473211
     ip79c98 |   -.0098572    .0343531     -0.29    0.774     -.0771881     .0574736
     ip79c99 |     .019935    .0336278      0.59    0.553     -.0459742     .0858442
     ip80c81 |   -.0672594    .0388612     -1.73    0.083     -.1434259      .008907
     ip80c82 |    .3919251    .0349115     11.23    0.000      .3234998     .4603504
     ip80c83 |    .5306055    .0337355     15.73    0.000      .4644851     .5967259
     ip80c84 |    .4145409    .0340142     12.19    0.000      .3478743     .4812075
     ip80c85 |    .4627815    .0337479     13.71    0.000      .3966367     .5289263
     ip80c86 |    .3936968    .0340005     11.58    0.000      .3270569     .4603366
     ip80c87 |     .334209    .0342543      9.76    0.000      .2670718     .4013461
     ip80c88 |    .3184538     .034358      9.27    0.000      .2511134     .3857941
     ip80c89 |    .2725903    .0345271      7.89    0.000      .2049184     .3402623
     ip80c90 |    .2314818    .0346568      6.68    0.000      .1635558     .2994078
     ip80c91 |    .2402363    .0345631      6.95    0.000      .1724937     .3079788
     ip80c92 |    .1413371    .0348833      4.05    0.000      .0729671     .2097071
     ip80c93 |    .1376572    .0348047      3.96    0.000      .0694413     .2058731
     ip80c94 |    .0845115    .0348755      2.42    0.015      .0161568     .1528661
     ip80c95 |    .0879629    .0346313      2.54    0.011      .0200868     .1558391
     ip80c96 |    .0906534    .0344342      2.63    0.008      .0231635     .1581433
     ip80c97 |    .0363373    .0342214      1.06    0.288     -.0307354     .1034101
     ip80c98 |    .0437974    .0338318      1.29    0.195     -.0225118     .1101065
     ip80c99 |    .0557853    .0334415      1.67    0.095     -.0097589     .1213295
     ip81c82 |   -.0745531    .0381158     -1.96    0.050     -.1492588     .0001526
     ip81c83 |    .4347831    .0338192     12.86    0.000      .3684986     .5010676
     ip81c84 |    .4073508    .0332273     12.26    0.000      .3422266     .4724751
     ip81c85 |    .4890818    .0326298     14.99    0.000      .4251287      .553035
     ip81c86 |    .3932987    .0328447     11.97    0.000      .3289242     .4576732
     ip81c87 |    .3673571    .0328446     11.18    0.000      .3029829     .4317313
     ip81c88 |    .3054694    .0330399      9.25    0.000      .2407124     .3702265
     ip81c89 |    .2591535    .0331933      7.81    0.000      .1940959     .3242112
     ip81c90 |    .2889117    .0330225      8.75    0.000      .2241888     .3536347
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ia2journal24 |   -.0021023    .0001661    -12.66    0.000     -.0024278    -.0017769
ia2journal25 |   -.0036275    .0004452     -8.15    0.000        -.0045    -.0027549
ia2journal26 |   -.0011674    .0006295     -1.85    0.064     -.0024012     .0000664
ia2journal27 |   -.0037919    .0003698    -10.26    0.000     -.0045166    -.0030672
ia2journal28 |   -.0018526    .0001632    -11.35    0.000     -.0021725    -.0015327
ia2journal29 |   -.0047455    .0003783    -12.54    0.000     -.0054869    -.0040041
ia2journal30 |   -.0018298    .0003952     -4.63    0.000     -.0026044    -.0010552
ia2journal31 |   -.0010986     .000202     -5.44    0.000     -.0014946    -.0007027
ia2journal32 |    -.002386    .0003058     -7.80    0.000     -.0029853    -.0017866
ia2journal33 |    .0007522    .0005026      1.50    0.134     -.0002329     .0017373
ia2journal34 |   -.0008364    .0004434     -1.89    0.059     -.0017054     .0000327
ia2journal35 |   -.0011836    .0008488     -1.39    0.163     -.0028472       .00048
ia2journal36 |   -.0010774    .0012634     -0.85    0.394     -.0035536     .0013988
ia2journal37 |   -.0019828     .000509     -3.90    0.000     -.0029804    -.0009852
ia2journal38 |   -.0018279    .0005008     -3.65    0.000     -.0028095    -.0008464
ia2journal39 |   -.0025977    .0007866     -3.30    0.001     -.0041393    -.0010561
ia2journal40 |   -.0008084     .000311     -2.60    0.009     -.0014179    -.0001988
ia2journal41 |    .0001635    .0010329      0.16    0.874      -.001861     .0021881
ia2journal42 |   -.0017093    .0003988     -4.29    0.000      -.002491    -.0009276
ia2journal43 |    .0004486    .0005258      0.85    0.394      -.000582     .0014792
ia2journal44 |    .0144178    .0022804      6.32    0.000      .0099482     .0188873
ia2journal45 |   -.0012173    .0002548     -4.78    0.000     -.0017166     -.000718
ia2journal46 |   -.0020608    .0005656     -3.64    0.000     -.0031694    -.0009523
ia2journal47 |   -.0032176    .0007665     -4.20    0.000     -.0047199    -.0017153
ia2journal48 |   -.0031044    .0015584     -1.99    0.046     -.0061589    -.0000499
ia2journal49 |   -.0019677    .0004272     -4.61    0.000      -.002805    -.0011303
ia2journal50 |    .0003133    .0008347      0.38    0.707     -.0013227     .0019493
ia2journal51 |   -.0025057    .0008431     -2.97    0.003     -.0041583    -.0008532
ia2journal52 |    -.002116    .0012218     -1.73    0.083     -.0045107     .0002787
ia2journal53 |   -.0045159    .0014894     -3.03    0.002     -.0074351    -.0015967
ia2journal54 |   -.0029823    .0003728     -8.00    0.000      -.003713    -.0022516
ia2journal55 |   -.0017663     .000279     -6.33    0.000      -.002313    -.0012195
ia2journal56 |   -.0032908    .0004647     -7.08    0.000     -.0042016      -.00238
ia2journal57 |    -.002657    .0006522     -4.07    0.000     -.0039352    -.0013788
ia2journal58 |   -.0010057    .0001864     -5.40    0.000      -.001371    -.0006403
ia2journal59 |   -.0008492    .0003586     -2.37    0.018     -.0015521    -.0001464
ia2journal60 |    .0001629    .0001566      1.04    0.298     -.0001439     .0004698
ia2journal61 |   -.0021844    .0009968     -2.19    0.028      -.004138    -.0002308
ia2journal62 |   -.0014535    .0002855     -5.09    0.000     -.0020132    -.0008938
ia2journal63 |   -.0032491    .0010959     -2.96    0.003      -.005397    -.0011012
ia2journal64 |   -.0025375     .000228    -11.13    0.000     -.0029844    -.0020906
ia2journal65 |   -.0049359     .001081     -4.57    0.000     -.0070547    -.0028171
ia2journal66 |   -.0019118    .0005364     -3.56    0.000      -.002963    -.0008605
ia2journal67 |   -.0020143     .000232     -8.68    0.000      -.002469    -.0015597
ia2journal68 |   -.0001112     .000175     -0.64    0.525     -.0004541     .0002318
ia2journal69 |   -.0025278    .0002308    -10.95    0.000     -.0029802    -.0020755
ia2journal70 |   -.0054138    .0017555     -3.08    0.002     -.0088545    -.0019732
ia2journal71 |    -.001258    .0002318     -5.43    0.000     -.0017123    -.0008038
ia2journal72 |   -.0014107    .0004386     -3.22    0.001     -.0022704    -.0005511
ia2journal73 |   -.0018728    .0002937     -6.38    0.000     -.0024484    -.0012973
ia2journal74 |    .0005622    .0003455      1.63    0.104      -.000115     .0012394
ia2journal75 |   -.0093383    .0081268     -1.15    0.251     -.0252666       .00659
ia2journal76 |   -.0044714    .0005204     -8.59    0.000     -.0054913    -.0034515
ia2journal77 |   -.0008762    .0005749     -1.52    0.128     -.0020031     .0002506
ia2journal78 |    -.000585    .0004933     -1.19    0.236     -.0015517     .0003818
ia2journal79 |   -.0024066    .0003697     -6.51    0.000     -.0031313     -.001682
ia2journal80 |   -.0001642    .0005667     -0.29    0.772     -.0012749     .0009465
ia2journal81 |    .0013536    .0007305      1.85    0.064     -.0000781     .0027853
ia2journal82 |   -.0014233    .0002355     -6.04    0.000     -.0018849    -.0009617
ia2journal83 |    .0027511    .0007841      3.51    0.000      .0012142      .004288
ia2journal84 |   -.0018713    .0009655     -1.94    0.053     -.0037637     .0000211
ia2journal85 |   -.0036122    .0008554     -4.22    0.000     -.0052887    -.0019357
ia2journal86 |   -.0018142    .0006497     -2.79    0.005     -.0030876    -.0005409
ia2journal87 |   -.0006049    .0004421     -1.37    0.171     -.0014713     .0002615
       d1c95 |    .0224274    .0117565      1.91    0.056      -.000615     .0454698
       d1c00 |     .001268    .0121142      0.10    0.917     -.0224755     .0250114
       d2c95 |    .0301703    .0092715      3.25    0.001      .0119986      .048342
       d2c00 |    .0249562    .0108247      2.31    0.021      .0037401     .0461723
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     cit_lag |    1.002301    .0004426      5.20    0.000      1.001434     1.003168
     ip76c81 |    1.603811    .2146194      3.53    0.000      1.233806     2.084777
     ip76c82 |    1.536487     .198051      3.33    0.001      1.193466     1.978097
     ip76c83 |    1.562143    .2058964      3.38    0.001      1.206506     2.022611
     ip76c84 |    1.463885     .178312      3.13    0.002      1.152987     1.858616
     ip76c85 |    1.454753    .1629544      3.35    0.001      1.167997      1.81191
     ip76c86 |    1.374245    .1598738      2.73    0.006      1.094055     1.726193
     ip76c87 |    1.309647    .1325037      2.67    0.008      1.074073     1.596889
     ip76c88 |    1.207918    .1198168      1.90    0.057      .9944989     1.467136
     ip76c89 |     1.18407    .1104307      1.81    0.070      .9862598     1.421555
     ip76c90 |    1.249986     .098454      2.83    0.005      1.071176     1.458644
     ip76c91 |    1.103812    .1045695      1.04    0.297      .9167623     1.329026
     ip76c92 |    1.062984    .0706913      0.92    0.358      .9330816     1.210972
     ip76c93 |    1.040326    .0882444      0.47    0.641      .8809824      1.22849
     ip76c94 |    .9681214    .0696065     -0.45    0.652      .8408716     1.114628
     ip76c95 |    1.043002    .0788811      0.56    0.578      .8993103     1.209652
     ip76c96 |    1.059412    .0625385      0.98    0.328      .9436635     1.189357
     ip76c97 |    .9500418    .0543153     -0.90    0.370      .8493334     1.062691
     ip76c98 |    1.039454    .0476845      0.84    0.399      .9500721     1.137244
     ip76c99 |     1.01795    .0602732      0.30    0.764      .9064137     1.143211
     ip77c81 |    1.459848    .1521277      3.63    0.000      1.190161     1.790645
     ip77c82 |    1.394995    .1758664      2.64    0.008      1.089588     1.786008
     ip77c83 |    1.415692    .1443489      3.41    0.001       1.15925     1.728861
     ip77c84 |    1.395287    .1467169      3.17    0.002      1.135424     1.714624
     ip77c85 |      1.3671    .1333968      3.20    0.001      1.129128     1.655227
     ip77c86 |    1.285752    .1284919      2.52    0.012      1.057042     1.563947
     ip77c87 |    1.244343    .0958778      2.84    0.005      1.069928     1.447192
     ip77c88 |    1.162871    .0917737      1.91    0.056      .9962188     1.357401
     ip77c89 |    1.150598    .1077613      1.50    0.134      .9576416     1.382434
     ip77c90 |    1.089354    .0881098      1.06    0.290      .9296549     1.276488
     ip77c91 |    1.037996    .0932044      0.42    0.678      .8704904     1.237734
     ip77c92 |    .9698968    .0688775     -0.43    0.667      .8438732     1.114741
     ip77c93 |    .9729579    .0792485     -0.34    0.736      .8293976     1.141367
     ip77c94 |    .9365652    .0741227     -0.83    0.408      .8019944     1.093716
     ip77c95 |    .9422286    .0509149     -1.10    0.271      .8475399     1.047496
     ip77c96 |    .9793095     .074837     -0.27    0.784      .8430877     1.137541
     ip77c97 |    .9291158    .0636396     -1.07    0.283      .8123945     1.062607
     ip77c98 |    .8925972    .0550749     -1.84    0.066      .7909241      1.00734
     ip77c99 |    .9237191    .0570766     -1.28    0.199      .8183597     1.042643
     ip78c81 |    1.781628    .1770148      5.81    0.000      1.466376     2.164655
     ip78c82 |    1.647073    .1436422      5.72    0.000      1.388286     1.954099
     ip78c83 |    1.743504    .1549883      6.25    0.000      1.464723     2.075344
     ip78c84 |    1.684505    .1338617      6.56    0.000      1.441552     1.968404
     ip78c85 |    1.657936    .1396432      6.00    0.000      1.405638     1.955519
     ip78c86 |    1.524259     .126808      5.07    0.000      1.294925     1.794209
     ip78c87 |    1.448214    .1197634      4.48    0.000      1.231518      1.70304
     ip78c88 |    1.401651    .1014694      4.66    0.000       1.21624     1.615328
     ip78c89 |    1.306976    .0970615      3.60    0.000      1.129936     1.511755
     ip78c90 |    1.289959    .0949491      3.46    0.001      1.116663     1.490149
     ip78c91 |    1.205142    .0874005      2.57    0.010      1.045457     1.389216
     ip78c92 |    1.128301    .0739949      1.84    0.066      .9922072     1.283061
     ip78c93 |    1.105807    .0698001      1.59    0.111      .9771251     1.251435
     ip78c94 |    1.083047    .0618214      1.40    0.162      .9684115     1.211253
     ip78c95 |    1.081465    .0711304      1.19    0.234      .9506635     1.230263
     ip78c96 |    1.109018    .0571197      2.01    0.045      1.002531     1.226816
     ip78c97 |    .9816835    .0610031     -0.30    0.766       .869114     1.108833
     ip78c98 |    1.073497    .0582456      1.31    0.191      .9651979     1.193947
     ip78c99 |    .9914568     .047199     -0.18    0.857      .9031331     1.088418
     ip79c81 |    1.348018    .1128023      3.57    0.000      1.144108     1.588271
     ip79c82 |    1.507471    .1209282      5.12    0.000      1.288149     1.764134
     ip79c83 |    1.508688    .1206367      5.14    0.000      1.289841     1.764667
     ip79c84 |    1.443171    .1011119      5.24    0.000         1.258     1.655598
     ip79c85 |    1.447349    .1183046      4.52    0.000      1.233096     1.698828
     ip79c86 |    1.351394    .1057473      3.85    0.000      1.159245     1.575393
     ip79c87 |    1.302875    .1087826      3.17    0.002      1.106197     1.534523
     ip79c88 |    1.236226    .0845794      3.10    0.002      1.081087     1.413627
     ip79c89 |    1.205976     .082417      2.74    0.006      1.054793     1.378828
     ip79c90 |    1.222916    .0909828      2.70    0.007      1.056985     1.414896
     ip79c91 |    1.119106    .0844012      1.49    0.136      .9653285     1.297381
     ip79c92 |    1.090118    .0812827      1.16    0.247      .9419006     1.261658
     ip79c93 |    1.056404    .0571537      1.01    0.310      .9501192     1.174578
     ip79c94 |    1.056219    .0779115      0.74    0.458      .9140403     1.220513
     ip79c95 |     1.05533    .0649532      0.87    0.382      .9354028     1.190632
     ip79c96 |    1.054266    .0504817      1.10    0.270      .9598248        1.158
     ip79c97 |     .979452     .054142     -0.38    0.707       .878882      1.09153
     ip79c98 |    .9901912    .0591754     -0.16    0.869      .8807445     1.113238
     ip79c99 |    1.020135    .0391292      0.52    0.603      .9462551     1.099783
     ip80c81 |    .9349526    .0749891     -0.84    0.402      .7989469     1.094111
     ip80c82 |    1.479827    .1045813      5.55    0.000      1.288414     1.699677
     ip80c83 |    1.699961      .09275      9.73    0.000      1.527557     1.891824
     ip80c84 |    1.513676      .08913      7.04    0.000      1.348688     1.698847
     ip80c85 |    1.588486    .0798946      9.20    0.000      1.439366     1.753055
     ip80c86 |    1.482451    .0861978      6.77    0.000      1.322777     1.661399
     ip80c87 |    1.396835    .0745929      6.26    0.000      1.258026      1.55096
     ip80c88 |       1.375    .0764986      5.72    0.000      1.232951     1.533415
     ip80c89 |    1.313362    .0829536      4.32    0.000      1.160437      1.48644
     ip80c90 |    1.260466    .0641402      4.55    0.000       1.14082     1.392661
     ip80c91 |     1.27155    .0864215      3.53    0.000      1.112964     1.452732
     ip80c92 |    1.151813    .0583498      2.79    0.005      1.042944     1.272047
     ip80c93 |    1.147582    .0638845      2.47    0.013       1.02896      1.27988
     ip80c94 |    1.088185     .063979      1.44    0.151      .9697441     1.221093
     ip80c95 |    1.091948    .0576874      1.67    0.096      .9845391     1.211074
     ip80c96 |    1.094889    .0579755      1.71    0.087      .9869571     1.214625
     ip80c97 |    1.037006    .0599079      0.63    0.529      .9259917     1.161329
     ip80c98 |    1.044771    .0488751      0.94    0.349      .9532375     1.145093
     ip80c99 |    1.057371    .0643591      0.92    0.359      .9384629     1.191345
     ip81c82 |    .9281582    .0853022     -0.81    0.417       .775162     1.111352
     ip81c83 |    1.544628    .1367668      4.91    0.000      1.298541     1.837352
     ip81c84 |    1.502831    .1194879      5.12    0.000      1.285975     1.756257
     ip81c85 |    1.630818    .1283015      6.22    0.000       1.39778     1.902708
     ip81c86 |    1.481861    .1362443      4.28    0.000      1.237505     1.774467
     ip81c87 |    1.443913    .1146345      4.63    0.000      1.235842     1.687017
     ip81c88 |    1.357262    .1147711      3.61    0.000      1.149967     1.601924
     ip81c89 |    1.295833    .0982499      3.42    0.001      1.116891     1.503443
     ip81c90 |    1.334974    .1178557      3.27    0.001      1.122861     1.587156
     ip81c91 |    1.220054    .0906729      2.68    0.007      1.054676     1.411365
     ip81c92 |    1.178922    .1020955      1.90    0.057       .994879      1.39701
     ip81c93 |     1.13797    .1012223      1.45    0.146      .9559095     1.354706
     ip81c94 |     1.06542     .070053      0.96    0.335      .9365974     1.211961
     ip81c95 |    1.096856    .0886681      1.14    0.253      .9361384     1.285167
     ip81c96 |    1.097925    .0880272      1.17    0.244      .9382679      1.28475
     ip81c97 |    1.024117    .0655421      0.37    0.710      .9033871     1.160982
     ip81c98 |    1.040475    .0726023      0.57    0.570      .9074785     1.192962
     ip81c99 |    1.014127    .0590702      0.24    0.810      .9047157      1.13677
     ip82c83 |    1.067886    .1095858      0.64    0.522      .8733239     1.305794
     ip82c84 |    1.581439    .1381918      5.25    0.000      1.332513     1.876867
     ip82c85 |    1.743399    .1548607      6.26    0.000       1.46483     2.074944
     ip82c86 |    1.596297    .1301043      5.74    0.000      1.360622     1.872793
     ip82c87 |    1.578152    .1360101      5.29    0.000      1.332876     1.868564
     ip82c88 |    1.567628    .1402045      5.03    0.000       1.31557      1.86798
     ip82c89 |     1.40104    .0934194      5.06    0.000      1.229401     1.596642
     ip82c90 |    1.460604    .1158803      4.78    0.000       1.25026     1.706336
     ip82c91 |    1.351985    .1131806      3.60    0.000      1.147398     1.593051
     ip82c92 |    1.294461    .0856234      3.90    0.000      1.137065     1.473644
     ip82c93 |    1.309686    .0979132      3.61    0.000      1.131177     1.516365
     ip82c94 |    1.210357    .0849681      2.72    0.007      1.054772     1.388892
     ip82c95 |    1.226453    .0967736      2.59    0.010      1.050719     1.431579
     ip82c96 |    1.228521    .0822737      3.07    0.002      1.077403     1.400836
     ip82c97 |    1.092719    .0639051      1.52    0.129      .9743793     1.225432
     ip82c98 |    1.125954    .0603124      2.21    0.027      1.013737     1.250592
     ip82c99 |    1.082916    .0560943      1.54    0.124      .9783696     1.198633
     ip83c84 |    1.060011    .0922425      0.67    0.503      .8937959     1.257136
     ip83c85 |     1.60468     .106769      7.11    0.000      1.408487     1.828201
     ip83c86 |    1.615596    .1108411      6.99    0.000      1.412324     1.848124
     ip83c87 |    1.526658    .1087379      5.94    0.000      1.327743     1.755374
     ip83c88 |    1.555135    .1066114      6.44    0.000       1.35961     1.778778
     ip83c89 |    1.417279    .0922179      5.36    0.000      1.247585     1.610053
     ip83c90 |    1.394573    .1031901      4.49    0.000      1.206305     1.612223
     ip83c91 |    1.318159    .0980384      3.71    0.000      1.139356     1.525022
     ip83c92 |    1.299176    .0924088      3.68    0.000      1.130116     1.493526
     ip83c93 |    1.249956    .0806715      3.46    0.001      1.101435     1.418505
     ip83c94 |    1.133031    .0747369      1.89    0.058      .9956233     1.289403
     ip83c95 |    1.199718    .0674824      3.24    0.001      1.074485     1.339547
     ip83c96 |    1.174495    .0706366      2.67    0.007      1.043898      1.32143
     ip83c97 |    1.088868    .0610211      1.52    0.129      .9756029     1.215282
     ip83c98 |    1.061219     .053998      1.17    0.243      .9604914     1.172511
     ip83c99 |     1.07238    .0536332      1.40    0.162      .9722486     1.182824
     ip84c85 |     .985754    .0853985     -0.17    0.868      .8318149     1.168182
     ip84c86 |    1.503159    .1020391      6.00    0.000      1.315899     1.717066
     ip84c87 |    1.525865    .1054208      6.12    0.000      1.332623     1.747129
     ip84c88 |    1.423088     .104271      4.82    0.000      1.232717     1.642858
     ip84c89 |    1.425808    .1092473      4.63    0.000       1.22699     1.656843
     ip84c90 |    1.387043    .0937029      4.84    0.000      1.215028     1.583411
     ip84c91 |    1.323207    .1036305      3.58    0.000      1.134916     1.542737
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ia2journal66 |    .9980901    .0001344    -14.20    0.000      .9978268     .9983535
ia2journal67 |    .9979877    .0000511    -39.36    0.000      .9978876     .9980878
ia2journal68 |    .9998889    .0001323     -0.84    0.401      .9996295     1.000148
ia2journal69 |    .9974754    .0000486    -51.92    0.000      .9973802     .9975706
ia2journal70 |    .9946008      .00022    -24.47    0.000      .9941696     .9950321
ia2journal71 |    .9987428    .0000958    -13.12    0.000      .9985551     .9989305
ia2journal72 |    .9985902    .0001234    -11.42    0.000      .9983484     .9988321
ia2journal73 |    .9981289    .0000983    -19.01    0.000      .9979362     .9983217
ia2journal74 |    1.000562    .0001298      4.34    0.000      1.000308     1.000817
ia2journal75 |    .9907052     .000466    -19.85    0.000      .9897923      .991619
ia2journal76 |    .9955386    .0001041    -42.75    0.000      .9953345     .9957427
ia2journal77 |    .9991242    .0001233     -7.10    0.000      .9988825     .9993659
ia2journal78 |    .9994152    .0001274     -4.59    0.000      .9991654      .999665
ia2journal79 |    .9975963    .0001059    -22.66    0.000      .9973886     .9978039
ia2journal80 |    .9998358    .0001502     -1.09    0.274      .9995415      1.00013
ia2journal81 |    1.001355    .0001448      9.36    0.000      1.001071     1.001638
ia2journal82 |    .9985777    .0000847    -16.79    0.000      .9984118     .9987437
ia2journal83 |    1.002755    .0001367     20.17    0.000      1.002487     1.003023
ia2journal84 |    .9981304    .0001542    -12.11    0.000      .9978282     .9984327
ia2journal85 |    .9963943     .000149    -24.16    0.000      .9961023     .9966864
ia2journal86 |    .9981874     .000128    -14.15    0.000      .9979366     .9984382
ia2journal87 |    .9993953    .0001629     -3.71    0.000      .9990761     .9997145
       d1c95 |    1.022681    .0228231      1.00    0.315      .9789125     1.068406
       d1c00 |    1.001269    .0131193      0.10    0.923      .9758828     1.027315
       d2c95 |     1.03063    .0150743      2.06    0.039      1.001504     1.060603
       d2c00 |     1.02527    .0177531      1.44    0.150      .9910585     1.060663
-------------+----------------------------------------------------------------
Wald chi2(402) =  3.3e+17                                Prob > chi2 =   0.0000

. **********************************************************************;
. *** 1986-1995                                                      ***;
. **********************************************************************;
. clear;

. use temp_data;

. gen plower = 1986;

. gen pupper = 1995;

. keep if pyear >= plower & pyear <= pupper;
(45,391 observations deleted)

. * Create fixed effects for publication x citation year interactions;
. * Drop the 2005 cyear to avoid multicolinearity with the constant;
. * Don't create variables with pyear after cyear;
. * Do create variables with pyear = cyear since keeping age0 = 1 observations;
. forvalues y = 56/99 {;
  2.    forvalues x = 80/99 {;
  3.       quietly gen ip`y'c`x' = py19`y' * c`x' if
>          (`x' >= `y')
>        & (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 56/99 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip`y'c0`x' = py19`y' * c0`x' if
>          (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 0/5 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip0`y'c0`x' = py200`y' * c0`x' if
>          (`x' >= `y')
>        & (2000 + `y' >= plower)
>        & (2000 + `y' <= pupper);
  4.    };
  5. };

. foreach var of varlist ip* {;
  2.    capture assert !missing(`var');
  3.    if _rc {;
  4.       drop `var';
  5.    };
  6. };

. egen title = group(journal);

. rename journal smournal;

. quietly tabulate title, generate(journal);

. drop title;

. foreach var of varlist journal* {;
  2.    quietly gen ia1`var' = age * `var';
  3.    quietly gen ia2`var' = age2 * `var';
  4.    quietly gen ia3`var' = age3 * `var';
  5.    quietly gen ia4`var' = age4 * `var';
  6. };

. rename smournal journal;

. * Avoid multicolinearity by dropping first journal's age profile;
.  drop ia1journal1 ia2journal1 ia3journal1 ia4journal1;

.  * Column 1: No fixed effects or journal age profile;
. poisson cit  ip* d1c* d2c*, irr cluster(journal);

Iteration 0:   log pseudolikelihood = -471245.26
Iteration 1:   log pseudolikelihood = -470342.41
Iteration 2:   log pseudolikelihood = -470335.68
Iteration 3:   log pseudolikelihood = -470335.67

Poisson regression                              Number of obs     =     15,062
                                                Wald chi2(98)     =          .
Log pseudolikelihood = -470335.67               Prob > chi2       =          .

(Std. Err. adjusted for 100 clusters in journal)
-------------+----------------------------------------------------------------
             |               Robust
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip86c86 |    .2789196    .0531214     -6.70    0.000      .1920279     .4051295
     ip86c87 |    1.173611    .1872335      1.00    0.316      .8584731     1.604433
     ip86c88 |     2.04027    .3300332      4.41    0.000      1.485928     2.801417
     ip86c89 |    2.298633    .3852488      4.97    0.000      1.655042     3.192495
     ip86c90 |     2.51121     .405354      5.70    0.000      1.830138     3.445737
     ip86c91 |    2.495325     .414961      5.50    0.000      1.801259      3.45683
     ip86c92 |    2.508407    .4123514      5.59    0.000      1.817485     3.461984
     ip86c93 |    2.477571    .4199146      5.35    0.000      1.777293     3.453769
     ip86c94 |    2.406557    .4039489      5.23    0.000      1.731885     3.344054
     ip86c95 |    2.358893    .4076965      4.97    0.000      1.681094     3.309975
     ip86c96 |     2.40502    .3659421      5.77    0.000      1.784851     3.240675
     ip86c97 |    2.144054    .3092175      5.29    0.000      1.616124     2.844441
     ip86c98 |      2.0402    .2903225      5.01    0.000       1.54364     2.696495
     ip86c99 |    1.888615    .2587985      4.64    0.000      1.443785     2.470497
     ip87c87 |    .2230766    .0403543     -8.29    0.000      .1564849     .3180061
     ip87c88 |    1.128219    .2000166      0.68    0.496       .797054     1.596978
     ip87c89 |    1.890397    .3253331      3.70    0.000      1.349159     2.648762
     ip87c90 |    2.251569     .378215      4.83    0.000       1.61995     3.129455
     ip87c91 |     2.38745    .4250758      4.89    0.000      1.684152     3.384444
     ip87c92 |    2.432154    .4419093      4.89    0.000      1.703462     3.472561
     ip87c93 |    2.471547    .4637607      4.82    0.000      1.710998     3.570164
     ip87c94 |    2.303797    .4328836      4.44    0.000      1.594055     3.329546
     ip87c95 |    1.889138    .2983184      4.03    0.000      1.386271     2.574417
     ip87c96 |    1.915529    .3019329      4.12    0.000      1.406433     2.608905
     ip87c97 |    1.731993    .2729396      3.49    0.000      1.271767     2.358763
     ip87c98 |    1.644363    .2376361      3.44    0.001      1.238756     2.182778
     ip87c99 |    1.580213    .2218931      3.26    0.001      1.200024     2.080851
     ip88c88 |    .2778648    .0484849     -7.34    0.000      .1973816     .3911655
     ip88c89 |    1.065509    .1757553      0.38    0.700      .7711731     1.472185
     ip88c90 |    1.969328    .2993457      4.46    0.000      1.461948     2.652797
     ip88c91 |    2.166131    .3282401      5.10    0.000      1.609532     2.915209
     ip88c92 |     2.42969    .3754546      5.75    0.000      1.794802     3.289161
     ip88c93 |    2.499482    .3755907      6.10    0.000      1.861839     3.355505
     ip88c94 |    2.432725    .3623054      5.97    0.000      1.816869     3.257334
     ip88c95 |    2.007699    .2213495      6.32    0.000      1.617533     2.491976
     ip88c96 |    1.979776     .205843      6.57    0.000      1.614783     2.427269
     ip88c97 |    1.839768    .1889476      5.94    0.000       1.50433     2.250003
     ip88c98 |     1.81253    .1856767      5.81    0.000      1.482817     2.215556
     ip88c99 |    1.657054    .1663369      5.03    0.000      1.361107      2.01735
     ip89c89 |    .2153896    .0431656     -7.66    0.000      .1454246     .3190153
     ip89c90 |    1.153321    .1869046      0.88    0.379      .8394724     1.584507
     ip89c91 |    1.941939    .3026021      4.26    0.000       1.43086     2.635565
     ip89c92 |    2.313507    .3575772      5.43    0.000      1.708868     3.132082
     ip89c93 |     2.51388    .4081763      5.68    0.000      1.828671     3.455837
     ip89c94 |    2.550779    .4202119      5.68    0.000      1.846916     3.522886
     ip89c95 |    2.033653    .2220837      6.50    0.000      1.641806     2.519021
     ip89c96 |    2.063702    .2229545      6.71    0.000      1.669885     2.550396
     ip89c97 |     1.85078    .2020397      5.64    0.000      1.494285     2.292323
     ip89c98 |    1.816725    .1901669      5.70    0.000      1.479753     2.230433
     ip89c99 |     1.78651    .1813307      5.72    0.000      1.464227     2.179728
     ip90c90 |    .2867686    .0492569     -7.27    0.000      .2047975     .4015491
     ip90c91 |    1.150438    .1918708      0.84    0.401      .8296581     1.595244
     ip90c92 |    2.055735    .3285534      4.51    0.000      1.502885     2.811956
     ip90c93 |    2.508593    .3700335      6.24    0.000      1.878766     3.349561
     ip90c94 |    2.746166      .41633      6.66    0.000      2.040239     3.696344
     ip90c95 |    2.208617    .2262155      7.74    0.000      1.806911     2.699627
     ip90c96 |    2.356287    .2382344      8.48    0.000       1.93271     2.872696
     ip90c97 |    2.100617    .2012778      7.75    0.000      1.740949      2.53459
     ip90c98 |    2.051912    .2007121      7.35    0.000      1.693934      2.48554
     ip90c99 |    1.975598    .1815118      7.41    0.000      1.650034     2.365399
     ip91c91 |    .2939169    .0590576     -6.09    0.000      .1982394     .4357717
     ip91c92 |     1.22192    .2136864      1.15    0.252      .8673343     1.721467
     ip91c93 |    2.194914    .3610046      4.78    0.000      1.590075     3.029824
     ip91c94 |     2.56704    .4244688      5.70    0.000      1.856452     3.549619
     ip91c95 |    2.149057    .2685996      6.12    0.000      1.682134     2.745587
     ip91c96 |    2.350467    .2958626      6.79    0.000       1.83658     3.008141
     ip91c97 |    2.139075    .2588272      6.28    0.000       1.68745     2.711572
     ip91c98 |    2.158155    .2530046      6.56    0.000      1.715121      2.71563
     ip91c99 |     2.09019    .2380501      6.47    0.000      1.672026     2.612934
     ip92c92 |    .2955988    .0522879     -6.89    0.000      .2089947     .4180903
     ip92c93 |    1.285412     .207321      1.56    0.120      .9370317     1.763318
     ip92c94 |    2.115443     .325805      4.86    0.000      1.564248     2.860864
     ip92c95 |    2.033627    .2042532      7.07    0.000      1.670238     2.476077
     ip92c96 |    2.266369    .2283259      8.12    0.000      1.860271     2.761119
     ip92c97 |    2.207528     .217737      8.03    0.000      1.819487     2.678327
     ip92c98 |    2.200881    .2023076      8.58    0.000      1.838032      2.63536
     ip92c99 |    2.097174    .1865705      8.32    0.000      1.761607     2.496662
     ip93c93 |     .328817    .0637787     -5.73    0.000      .2248287     .4809023
     ip93c94 |    1.165155    .1823759      0.98    0.329      .8573323       1.5835
     ip93c95 |     1.56634    .1630107      4.31    0.000      1.277323     1.920753
     ip93c96 |    2.053223    .2146425      6.88    0.000      1.672831     2.520114
     ip93c97 |    2.086871    .2157899      7.11    0.000      1.704034     2.555717
     ip93c98 |    2.224357    .2303862      7.72    0.000       1.81569     2.725003
     ip93c99 |    2.149733    .2035443      8.08    0.000      1.785623      2.58809
     ip94c94 |    .2922349    .0495216     -7.26    0.000      .2096472     .4073571
     ip94c95 |    .9113434    .1037638     -0.82    0.415      .7290644     1.139195
     ip94c96 |    1.687872    .1733132      5.10    0.000      1.380184     2.064155
     ip94c97 |    1.999553    .1968699      7.04    0.000      1.648641     2.425155
     ip94c98 |    2.293781    .2198332      8.66    0.000      1.900964     2.767771
     ip94c99 |    2.311812    .2204874      8.79    0.000      1.917652     2.786989
     ip95c95 |    .2323583    .0349307     -9.71    0.000      .1730598     .3119754
     ip95c96 |    .9327733    .1001446     -0.65    0.517      .7557692     1.151232
     ip95c97 |    1.620911    .1605098      4.88    0.000      1.334963     1.968108
     ip95c98 |    1.790487     .172475      6.05    0.000      1.482436      2.16255
     ip95c99 |    1.950618    .1932573      6.74    0.000      1.606347     2.368672
     ip86c00 |    1.688303    .2112863      4.18    0.000      1.321067     2.157624
     ip86c01 |    1.491556    .1789543      3.33    0.001         1.179     1.886971
     ip86c02 |    1.080709    .0972507      0.86    0.388      .9059643     1.289159
     ip86c03 |    .8889867    .0667968     -1.57    0.117      .7672512     1.030037
     ip86c04 |    .8576545    .0739232     -1.78    0.075      .7243449     1.015499
     ip87c00 |    1.260043    .1504952      1.94    0.053      .9970586     1.592392
     ip87c01 |    1.201323    .1482236      1.49    0.137      .9432682     1.529974
     ip87c02 |    .9590469    .1069954     -0.37    0.708      .7706836     1.193448
     ip87c03 |    .7642415    .0687976     -2.99    0.003      .6406263     .9117095
     ip87c04 |    .7873701     .075059     -2.51    0.012      .6531831      .949124
     ip88c00 |    1.300795     .108669      3.15    0.002      1.104331     1.532212
     ip88c01 |    1.240964    .1011869      2.65    0.008      1.057677     1.456013
     ip88c02 |    1.064642    .0795368      0.84    0.402      .9196286     1.232522
     ip88c03 |    .8769317    .0568529     -2.03    0.043       .772291     .9957506
     ip88c04 |    .8421243    .0530477     -2.73    0.006       .744315     .9527867
     ip89c00 |    1.378878    .1124527      3.94    0.000      1.175188     1.617874
     ip89c01 |    1.338822    .1100386      3.55    0.000      1.139625     1.572837
     ip89c02 |    1.168512    .0878634      2.07    0.038      1.008392     1.354058
     ip89c03 |    .9632284    .0572394     -0.63    0.528       .857328      1.08221
     ip89c04 |    .9486276    .0559986     -0.89    0.372      .8449836     1.064984
     ip90c00 |    1.570789    .1178953      6.02    0.000      1.355911     1.819721
     ip90c01 |     1.53042    .1116303      5.83    0.000      1.326548     1.765623
     ip90c02 |    1.311098    .0851887      4.17    0.000      1.154326     1.489163
     ip90c03 |    1.153505    .0721076      2.28    0.022      1.020491     1.303856
     ip90c04 |    1.116315    .0702018      1.75    0.080       .986864     1.262747
     ip91c00 |    1.644338    .1383664      5.91    0.000      1.394327     1.939176
     ip91c01 |    1.601497    .1331862      5.66    0.000      1.360621     1.885016
     ip91c02 |     1.38732    .1031247      4.40    0.000      1.199233     1.604906
     ip91c03 |    1.191191    .0744521      2.80    0.005      1.053852     1.346429
     ip91c04 |    1.165577    .0624889      2.86    0.004      1.049316     1.294719
     ip92c00 |    1.743788    .1244464      7.79    0.000      1.516168     2.005581
     ip92c01 |    1.636465    .1181546      6.82    0.000      1.420526     1.885231
     ip92c02 |    1.449136    .0950561      5.66    0.000      1.274308     1.647948
     ip92c03 |    1.252071     .060372      4.66    0.000      1.139164      1.37617
     ip92c04 |    1.200638    .0614844      3.57    0.000      1.085981       1.3274
     ip93c00 |    1.682396    .1172141      7.47    0.000      1.467656     1.928556
     ip93c01 |    1.588432    .0985932      7.46    0.000      1.406484     1.793917
     ip93c02 |    1.443099    .0787608      6.72    0.000        1.2967     1.606026
     ip93c03 |      1.2759    .0546614      5.69    0.000       1.17314     1.387661
     ip93c04 |    1.282068     .050422      6.32    0.000      1.186956     1.384802
     ip94c00 |    1.815347    .1415823      7.65    0.000      1.558019     2.115176
     ip94c01 |    1.737071    .1176707      8.15    0.000      1.521095     1.983712
     ip94c02 |    1.502721    .0887661      6.89    0.000      1.338436      1.68717
     ip94c03 |    1.385677    .0723689      6.25    0.000      1.250855     1.535032
     ip94c04 |    1.369672    .0704216      6.12    0.000      1.238375      1.51489
     ip95c00 |    1.537696    .0971661      6.81    0.000      1.358575     1.740434
     ip95c01 |    1.512222    .0859696      7.27    0.000      1.352773     1.690465
     ip95c02 |    1.432194    .0768954      6.69    0.000      1.289141     1.591122
     ip95c03 |    1.484876    .0798341      7.35    0.000      1.336366      1.64989
     ip95c04 |    1.484894    .0759592      7.73    0.000      1.343237      1.64149
       d1c95 |    1.882329    .2765518      4.31    0.000      1.411357     2.510464
       d1c00 |    1.344869    .1147277      3.47    0.001        1.1378     1.589623
       d2c95 |    1.855944    .3246076      3.54    0.000      1.317311     2.614818
       d2c00 |    2.709363    .4590963      5.88    0.000      1.943715     3.776605
       _cons |    23.78225    3.192429     23.61    0.000      18.28063      30.9396
-------------+----------------------------------------------------------------

.   * Column 2: Journal fixed effects, no age profile;
. xtpqml cit ip* d1c* d2c*, i(journal) irr fe cluster(journal);
note: 1 group (155 obs) dropped because of all zero outcomes

Iteration 0:   log likelihood =  -165882.5
Iteration 1:   log likelihood = -114052.47
Iteration 2:   log likelihood = -107441.17
Iteration 3:   log likelihood = -107247.87
Iteration 4:   log likelihood = -107246.92
Iteration 5:   log likelihood = -107246.92

Conditional fixed-effects Poisson regression    Number of obs     =     14,907
Group variable: journal                         Number of groups  =         99

                                                Obs per group:
                                                              min =         81
                                                              avg =      150.6
                                                              max =        155

                                                Wald chi2(149)    =   71862.92
Log likelihood  = -107246.92                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip86c86 |   -2.110571    .0416005    -50.73    0.000     -2.192106    -2.029035
     ip86c87 |   -.6736535    .0212991    -31.63    0.000     -.7153989     -.631908
     ip86c88 |   -.1206564    .0168687     -7.15    0.000     -.1537185    -.0875944
     ip86c89 |   -.0014242    .0160877     -0.09    0.929     -.0329555     .0301072
     ip86c90 |    .0870259    .0155438      5.60    0.000      .0565606     .1174911
     ip86c91 |    .0806802    .0155818      5.18    0.000      .0501404       .11122
     ip86c92 |     .085909    .0155505      5.52    0.000      .0554306     .1163873
     ip86c93 |      .07354    .0156248      4.71    0.000      .0429159     .1041641
     ip86c94 |    .0444582    .0158019      2.81    0.005       .013487     .0754293
     ip86c95 |    .0338975    .0158665      2.14    0.033      .0027996     .0649953
     ip86c96 |    .1000659     .015465      6.47    0.000       .069755     .1303768
     ip86c97 |   -.0117498    .0160743     -0.73    0.465     -.0432549     .0197552
     ip86c98 |   -.0346971    .0162174     -2.14    0.032     -.0664826    -.0029116
     ip86c99 |   -.0697549    .0164414     -4.24    0.000     -.1019794    -.0375305
     ip87c87 |   -2.305159    .0451606    -51.04    0.000     -2.393672    -2.216645
     ip87c88 |   -.6842784     .021158    -32.34    0.000     -.7257474    -.6428095
     ip87c89 |   -.1681316    .0170144     -9.88    0.000     -.2014791     -.134784
     ip87c90 |    .0067087    .0158723      0.42    0.673     -.0244005     .0378179
     ip87c91 |    .0653077    .0155159      4.21    0.000      .0348971     .0957182
     ip87c92 |     .083859    .0154057      5.44    0.000      .0536644     .1140536
     ip87c93 |    .0999258    .0153113      6.53    0.000      .0699163     .1299353
     ip87c94 |    .0296401    .0157313      1.88    0.060     -.0011927      .060473
     ip87c95 |    .0386585    .0157692      2.45    0.014      .0077514     .0695657
     ip87c96 |    .0624084    .0154585      4.04    0.000      .0321103     .0927066
     ip87c97 |   -.0337861    .0160423     -2.11    0.035     -.0652284    -.0023437
     ip87c98 |   -.0571529    .0161949     -3.53    0.000     -.0888943    -.0254114
     ip87c99 |    -.084447    .0163813     -5.16    0.000     -.1165537    -.0523403
     ip88c88 |   -2.091092    .0401907    -52.03    0.000     -2.169864     -2.01232
     ip88c89 |    -.747018    .0214957    -34.75    0.000     -.7891489    -.7048872
     ip88c90 |   -.1327785    .0165937     -8.00    0.000     -.1653015    -.1002554
     ip88c91 |   -.0375283    .0159797     -2.35    0.019      -.068848    -.0062086
     ip88c92 |     .077293    .0152854      5.06    0.000      .0473341     .1072519
     ip88c93 |    .1056125    .0151216      6.98    0.000      .0759748     .1352503
     ip88c94 |    .0785411    .0152781      5.14    0.000      .0485965     .1084857
     ip88c95 |    .1191363    .0151956      7.84    0.000      .0893534     .1489191
     ip88c96 |    .1174867    .0149915      7.84    0.000      .0881039     .1468694
     ip88c97 |    .0407355    .0154439      2.64    0.008      .0104661     .0710049
     ip88c98 |    .0535219    .0153717      3.48    0.000      .0233939     .0836498
     ip88c99 |    -.017451    .0158115     -1.10    0.270     -.0484409      .013539
     ip89c89 |   -2.342511    .0452447    -51.77    0.000     -2.431189    -2.253833
     ip89c90 |   -.6645582    .0206659    -32.16    0.000     -.7050625    -.6240538
     ip89c91 |    -.143517    .0166132     -8.64    0.000     -.1760784    -.1109557
     ip89c92 |    .0315608    .0155085      2.04    0.042      .0011647     .0619569
     ip89c93 |    .1146234    .0150244      7.63    0.000      .0851761     .1440706
     ip89c94 |     .129195     .014942      8.65    0.000      .0999092     .1584807
     ip89c95 |    .1497027    .0148747     10.06    0.000      .1205488     .1788567
     ip89c96 |    .1732222    .0146313     11.84    0.000      .1445454     .2018989
     ip89c97 |    .0686165    .0152304      4.51    0.000      .0387655     .0984674
     ip89c98 |    .0761162    .0151966      5.01    0.000      .0463314      .105901
     ip89c99 |    .0777863    .0152026      5.12    0.000      .0479899     .1075828
     ip90c90 |   -2.055408    .0390024    -52.70    0.000     -2.131851    -1.978965
     ip90c91 |   -.6661854    .0205038    -32.49    0.000     -.7063721    -.6259987
     ip90c92 |   -.0856946    .0161074     -5.32    0.000     -.1172646    -.0541246
     ip90c93 |    .1133943    .0149173      7.60    0.000      .0841569     .1426316
     ip90c94 |    .2038777    .0144231     14.14    0.000       .175609     .2321464
     ip90c95 |    .2287358    .0143395     15.95    0.000      .2006308     .2568408
     ip90c96 |    .3022898    .0138497     21.83    0.000       .275145     .3294346
     ip90c97 |    .2127997    .0143256     14.85    0.000       .184722     .2408773
     ip90c98 |    .2132478    .0143371     14.87    0.000      .1851477     .2413479
     ip90c99 |    .1989369    .0144349     13.78    0.000       .170645     .2272288
     ip91c91 |   -2.030787    .0385425    -52.69    0.000     -2.106329    -1.955245
     ip91c92 |   -.6059048    .0199756    -30.33    0.000     -.6450563    -.5667534
     ip91c93 |    -.020185    .0156997     -1.29    0.199     -.0509558     .0105858
     ip91c94 |    .1364257    .0147888      9.22    0.000      .1074402     .1654113
     ip91c95 |    .2150884    .0144138     14.92    0.000      .1868378     .2433389
     ip91c96 |    .2999056    .0138585     21.64    0.000      .2727436     .3270677
     ip91c97 |     .237527    .0141974     16.73    0.000      .2097005     .2653534
     ip91c98 |    .2757577    .0140216     19.67    0.000      .2482759     .3032396
     ip91c99 |    .2672757    .0140872     18.97    0.000      .2396652     .2948861
     ip92c92 |   -2.025081    .0384368    -52.69    0.000     -2.100415    -1.949746
     ip92c93 |   -.5552484    .0195455    -28.41    0.000     -.5935569    -.5169399
     ip92c94 |   -.0570636    .0159272     -3.58    0.000     -.0882804    -.0258468
     ip92c95 |     .195209    .0144868     13.47    0.000      .1668154     .2236026
     ip92c96 |    .3128792    .0138165     22.65    0.000      .2857994      .339959
     ip92c97 |    .2918288    .0139288     20.95    0.000      .2645288     .3191288
     ip92c98 |    .3174174    .0138478     22.92    0.000      .2902762     .3445586
     ip92c99 |     .294397    .0139653     21.08    0.000      .2670255     .3217684
     ip93c93 |   -1.918583    .0365196    -52.54    0.000      -1.99016    -1.847006
     ip93c94 |   -.6534741    .0203909    -32.05    0.000     -.6934396    -.6135087
     ip93c95 |   -.0537737    .0159303     -3.38    0.001     -.0849965    -.0225509
     ip93c96 |     .226569    .0142585     15.89    0.000      .1986229     .2545151
     ip93c97 |    .2414312    .0141878     17.02    0.000      .2136235     .2692388
     ip93c98 |    .3052332    .0138674     22.01    0.000      .2780535     .3324128
     ip93c99 |      .31915    .0138442     23.05    0.000      .2920159     .3462842
     ip94c94 |   -2.036526    .0386492    -52.69    0.000     -2.112277    -1.960775
     ip94c95 |   -.6025222    .0198939    -30.29    0.000     -.6415134    -.5635309
     ip94c96 |    .0381724    .0152989      2.50    0.013       .008187     .0681577
     ip94c97 |    .2041608    .0143901     14.19    0.000      .1759568     .2323648
     ip94c98 |    .3409947     .013707     24.88    0.000      .3141294       .36786
     ip94c99 |    .3699563     .013564     27.27    0.000      .3433713     .3965412
     ip95c95 |   -1.968119    .0380742    -51.69    0.000     -2.042743    -1.893495
     ip95c96 |   -.5740155     .019908    -28.83    0.000     -.6130345    -.5349965
     ip95c97 |   -.0060664    .0157766     -0.38    0.701      -.036988     .0248552
     ip95c98 |    .2307166    .0145279     15.88    0.000      .2022424     .2591908
     ip95c99 |    .3272977    .0140654     23.27    0.000        .29973     .3548653
     ip86c00 |    -.102277    .0157245     -6.50    0.000     -.1330966    -.0714575
     ip86c01 |   -.1511277    .0158559     -9.53    0.000     -.1822048    -.1200506
     ip86c02 |   -.2043727    .0156645    -13.05    0.000     -.2350746    -.1736708
     ip86c03 |   -.2064603    .0154134    -13.39    0.000       -.23667    -.1762506
     ip86c04 |   -.2247267    .0155336    -14.47    0.000      -.255172    -.1942815
     ip87c00 |   -.1878202     .015639    -12.01    0.000     -.2184721    -.1571683
     ip87c01 |    -.202652    .0156531    -12.95    0.000     -.2333316    -.1719725
     ip87c02 |   -.2439186    .0157121    -15.52    0.000     -.2747138    -.2131234
     ip87c03 |    -.297644    .0158603    -18.77    0.000     -.3287297    -.2665583
     ip87c04 |   -.2541987    .0155361    -16.36    0.000     -.2846488    -.2237486
     ip88c00 |   -.1007903    .0147153     -6.85    0.000     -.1296317    -.0719488
     ip88c01 |   -.1237106    .0148128     -8.35    0.000     -.1527432     -.094678
     ip88c02 |   -.1427843    .0148443     -9.62    0.000     -.1718785    -.1136901
     ip88c03 |   -.1665588    .0147623    -11.28    0.000     -.1954924    -.1376252
     ip88c04 |   -.1936541    .0149418    -12.96    0.000     -.2229394    -.1643688
     ip89c00 |   -.0230294    .0141644     -1.63    0.104     -.0507911     .0047323
     ip89c01 |   -.0294246    .0141428     -2.08    0.037      -.057144    -.0017053
     ip89c02 |    -.033752    .0140476     -2.40    0.016     -.0612848    -.0062193
     ip89c03 |   -.0663803    .0140387     -4.73    0.000     -.0938956     -.038865
     ip89c04 |   -.0685903    .0140457     -4.88    0.000     -.0961194    -.0410612
     ip90c00 |    .1313345    .0130789     10.04    0.000      .1057003     .1569687
     ip90c01 |    .1226131     .013093      9.36    0.000      .0969513     .1482748
     ip90c02 |    .0884378    .0131799      6.71    0.000      .0626057     .1142699
     ip90c03 |    .1169979    .0128087      9.13    0.000      .0918932     .1421025
     ip90c04 |     .099445    .0129011      7.71    0.000      .0741592     .1247307
     ip91c00 |    .1869796    .0127481     14.67    0.000      .1619938     .2119655
     ip91c01 |    .1805761    .0127424     14.17    0.000      .1556015     .2055508
     ip91c02 |    .1396996    .0129039     10.83    0.000      .1144084     .1649907
     ip91c03 |    .1491466    .0126257     11.81    0.000      .1244007     .1738925
     ip91c04 |    .1426277    .0126537     11.27    0.000      .1178268     .1674285
     ip92c00 |    .2678975    .0122818     21.81    0.000      .2438257     .2919694
     ip92c01 |    .2255749    .0124678     18.09    0.000      .2011385     .2500113
     ip92c02 |    .1950235    .0125719     15.51    0.000      .1703831     .2196639
     ip92c03 |    .1937365    .0123784     15.65    0.000      .1694752     .2179978
     ip92c04 |    .1670988    .0125177     13.35    0.000      .1425647      .191633
     ip93c00 |    .2336886    .0124601     18.75    0.000      .2092672     .2581099
     ip93c01 |    .2418844    .0123261     19.62    0.000      .2177257     .2660431
     ip93c02 |    .2257622     .012354     18.27    0.000      .2015489     .2499756
     ip93c03 |    .2178449    .0122453     17.79    0.000      .1938447     .2418452
     ip93c04 |    .2326796    .0121577     19.14    0.000       .208851     .2565083
     ip94c00 |    .3174891    .0119976     26.46    0.000      .2939741      .341004
     ip94c01 |    .3368094    .0118127     28.51    0.000       .313657     .3599618
     ip94c02 |    .2666506    .0121274     21.99    0.000      .2428813     .2904198
     ip94c03 |    .3058273    .0117705     25.98    0.000      .2827575     .3288971
     ip94c04 |    .2997948     .011801     25.40    0.000      .2766651     .3229244
     ip95c00 |    .2898211    .0121691     23.82    0.000      .2659702      .313672
     ip95c01 |    .3253472    .0118719     27.40    0.000      .3020788     .3486157
     ip95c02 |    .3148786    .0119073     26.44    0.000      .2915406     .3382165
     ip95c03 |    .3537456     .011704     30.22    0.000      .3308062     .3766849
     ip95c04 |    .3642853    .0116432     31.29    0.000      .3414651     .3871055
       d1c95 |    .0029113    .0068611      0.42    0.671     -.0105362     .0163588
       d1c00 |    .0352551    .0091969      3.83    0.000      .0172295     .0532807
       d2c95 |    .0254554    .0047922      5.31    0.000      .0160629      .034848
       d2c00 |    .1342664    .0063171     21.25    0.000      .1218851     .1466477
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     ip86c86 |    .1211688    .0187864    -13.61    0.000      .0894165     .1641965
     ip86c87 |    .5098425    .0361841     -9.49    0.000      .4436345     .5859313
     ip86c88 |    .8863384    .0668081     -1.60    0.109      .7646098     1.027447
     ip86c89 |    .9985768    .0759173     -0.02    0.985      .8603368     1.159029
     ip86c90 |    1.090925    .0794409      1.20    0.232      .9458245     1.258285
     ip86c91 |    1.084024    .0835614      1.05    0.295      .9320186     1.260821
     ip86c92 |    1.089707    .0788673      1.19    0.235      .9455931     1.255785
     ip86c93 |    1.076312    .0809722      0.98    0.328      .9287549     1.247311
     ip86c94 |    1.045461    .0660683      0.70    0.482      .9236681     1.183314
     ip86c95 |    1.034479    .0711785      0.49    0.622       .903969      1.18383
     ip86c96 |    1.105244    .0783544      1.41    0.158      .9618638     1.269997
     ip86c97 |    .9883189    .0627327     -0.19    0.853      .8727056     1.119248
     ip86c98 |    .9658979    .0627976     -0.53    0.594       .850336     1.097165
     ip86c99 |    .9326223    .0609808     -1.07    0.286      .8204439     1.060139
     ip87c87 |     .099743    .0107084    -21.47    0.000      .0808161     .1231025
     ip87c88 |    .5044541    .0459303     -7.52    0.000      .4220074     .6030082
     ip87c89 |    .8452426    .0713338     -1.99    0.046      .7163821     .9972821
     ip87c90 |    1.006731    .0799131      0.08    0.933      .8616805     1.176199
     ip87c91 |    1.067487    .1008774      0.69    0.490      .8870014     1.284698
     ip87c92 |    1.087476    .1052272      0.87    0.386      .8996112     1.314571
     ip87c93 |    1.105089    .1094152      1.01    0.313      .9101637      1.34176
     ip87c94 |    1.030084    .1010459      0.30    0.763      .8499122      1.24845
     ip87c95 |    1.039416    .0986859      0.41    0.684      .8629249     1.252003
     ip87c96 |    1.064397     .109248      0.61    0.543      .8704377     1.301576
     ip87c97 |    .9667783    .0935123     -0.35    0.727      .7998229     1.168584
     ip87c98 |    .9444497    .0807192     -0.67    0.504      .7987838     1.116679
     ip87c99 |    .9190204    .0766693     -1.01    0.311      .7803934     1.082273
     ip88c88 |    .1235522    .0173335    -14.91    0.000      .0938497     .1626552
     ip88c89 |    .4737772    .0393773     -8.99    0.000      .4025574     .5575972
     ip88c90 |    .8756591    .0697114     -1.67    0.095      .7491533     1.023527
     ip88c91 |    .9631671    .0722939     -0.50    0.617      .8314033     1.115813
     ip88c92 |    1.080359    .0808493      1.03    0.302      .9329702     1.251031
     ip88c93 |    1.111391    .0845034      1.39    0.165      .9575177     1.289992
     ip88c94 |    1.081708    .0796957      1.07    0.286      .9362612     1.249749
     ip88c95 |    1.126523    .0788597      1.70    0.089      .9820957     1.292191
     ip88c96 |    1.124667    .0777658      1.70    0.089      .9821254     1.287896
     ip88c97 |    1.041577     .074211      0.57    0.568      .9058248     1.197673
     ip88c98 |     1.05498     .076252      0.74    0.459       .915632     1.215535
     ip88c99 |    .9827004    .0668658     -0.26    0.798      .8600089     1.122896
     ip89c89 |    .0960861    .0110797    -20.31    0.000      .0766493     .1204516
     ip89c90 |    .5145008    .0317306    -10.78    0.000      .4559216     .5806065
     ip89c91 |     .866306    .0575137     -2.16    0.031      .7606072     .9866935
     ip89c92 |    1.032064    .0617333      0.53    0.598      .9178923     1.160437
     ip89c93 |    1.121451    .0670977      1.92    0.055      .9973599     1.260981
     ip89c94 |    1.137912    .0658258      2.23    0.026      1.015941     1.274527
     ip89c95 |    1.161489    .0552786      3.15    0.002      1.058044     1.275047
     ip89c96 |     1.18913    .0584794      3.52    0.000      1.079863     1.309454
     ip89c97 |    1.071025    .0527797      1.39    0.164      .9724178     1.179632
     ip89c98 |    1.079088    .0555667      1.48    0.139      .9754949     1.193682
     ip89c99 |    1.080892    .0518146      1.62    0.105      .9839617      1.18737
     ip90c90 |    .1280406    .0149609    -17.59    0.000       .101833     .1609928
     ip90c91 |    .5136643    .0364922     -9.38    0.000      .4468971     .5904065
     ip90c92 |    .9178745    .0552814     -1.42    0.155      .8156755     1.032878
     ip90c93 |    1.120073    .0606343      2.09    0.036       1.00732     1.245448
     ip90c94 |    1.226148    .0623526      4.01    0.000      1.109832     1.354655
     ip90c95 |     1.25701    .0634603      4.53    0.000      1.138586     1.387751
     ip90c96 |    1.352953    .0712943      5.74    0.000      1.220193     1.500158
     ip90c97 |    1.237137     .064791      4.06    0.000      1.116449     1.370871
     ip90c98 |    1.237691    .0711045      3.71    0.000      1.105889     1.385203
     ip90c99 |    1.220105    .0659948      3.68    0.000      1.097378     1.356557
     ip91c91 |    .1312322    .0143426    -18.58    0.000      .1059282     .1625809
     ip91c92 |    .5455805    .0404813     -8.17    0.000      .4717381     .6309817
     ip91c93 |    .9800174    .0590536     -0.33    0.738      .8708478     1.102872
     ip91c94 |     1.14617    .0644254      2.43    0.015      1.026605     1.279659
     ip91c95 |    1.239971    .0693611      3.85    0.000      1.111213     1.383649
     ip91c96 |    1.349731    .0718794      5.63    0.000      1.215953     1.498228
     ip91c97 |    1.268109    .0730627      4.12    0.000      1.132698     1.419708
     ip91c98 |    1.317529    .0725473      5.01    0.000      1.182743     1.467675
     ip91c99 |    1.306401    .0769799      4.54    0.000      1.163909     1.466336
     ip92c92 |    .1319832    .0144084    -18.55    0.000        .10656     .1634718
     ip92c93 |    .5739297    .0363624     -8.76    0.000      .5069081     .6498127
     ip92c94 |     .944534    .0571047     -0.94    0.345      .8389876     1.063358
     ip92c95 |    1.215565    .0683005      3.47    0.001      1.088806     1.357081
     ip92c96 |    1.367356    .0779082      5.49    0.000      1.222876     1.528906
     ip92c97 |    1.338874    .0751376      5.20    0.000      1.199417     1.494545
     ip92c98 |    1.373576    .0771055      5.65    0.000      1.230469     1.533327
     ip92c99 |    1.342317     .072552      5.45    0.000       1.20739     1.492321
     ip93c93 |    .1468149    .0195798    -14.39    0.000      .1130448     .1906731
     ip93c94 |    .5202353    .0338273    -10.05    0.000      .4579857     .5909458
     ip93c95 |    .9476466     .055596     -0.92    0.359      .8447118     1.063125
     ip93c96 |    1.254289     .065478      4.34    0.000      1.132302     1.389419
     ip93c97 |     1.27307    .0636283      4.83    0.000      1.154274     1.404092
     ip93c98 |    1.356941    .0647845      6.39    0.000      1.235726     1.490047
     ip93c99 |    1.375958    .0686078      6.40    0.000      1.247851     1.517217
     ip94c94 |    .1304812    .0128031    -20.76    0.000      .1076531     .1581502
     ip94c95 |    .5474292    .0369934     -8.92    0.000      .4795198     .6249558
     ip94c96 |     1.03891    .0675231      0.59    0.557        .91465     1.180052
     ip94c97 |    1.226495    .0710565      3.52    0.000      1.094843     1.373978
     ip94c98 |    1.406346    .0785909      6.10    0.000      1.260446     1.569133
     ip94c99 |    1.447671    .0860516      6.22    0.000      1.288467     1.626547
     ip95c95 |    .1397195    .0177951    -15.45    0.000      .1088543     .1793363
     ip95c96 |    .5632591    .0405213     -7.98    0.000      .4891838     .6485514
     ip95c97 |     .993952    .0655381     -0.09    0.927      .8734536     1.131074
     ip95c98 |    1.259502    .0813522      3.57    0.000      1.109735     1.429482
     ip95c99 |    1.387214    .0918615      4.94    0.000      1.218364     1.579466
     ip86c00 |    .9027794    .0577299     -1.60    0.110      .7964344     1.023324
     ip86c01 |    .8597379    .0564865     -2.30    0.021      .7558583     .9778939
     ip86c02 |    .8151585    .0546889     -3.05    0.002      .7147185     .9297134
     ip86c03 |    .8134586    .0559242     -3.00    0.003      .7109129     .9307959
     ip86c04 |    .7987344    .0644106     -2.79    0.005       .681963     .9355004
     ip87c00 |    .8287637     .074097     -2.10    0.036      .6955489     .9874924
     ip87c01 |    .8165623     .077415     -2.14    0.033      .6780947     .9833052
     ip87c02 |    .7835514    .0738913     -2.59    0.010      .6513233     .9426238
     ip87c03 |    .7425657    .0646296     -3.42    0.001      .6261093      .880683
     ip87c04 |    .7755377    .0720555     -2.74    0.006      .6464239       .93044
     ip88c00 |    .9041226    .0631282     -1.44    0.149      .7884865     1.036717
     ip88c01 |    .8836355     .060277     -1.81    0.070      .7730519     1.010038
     ip88c02 |    .8669411    .0581312     -2.13    0.033      .7601754     .9887018
     ip88c03 |     .846573     .055226     -2.55    0.011      .7449661     .9620383
     ip88c04 |    .8239428    .0525376     -3.04    0.002      .7271456     .9336256
     ip89c00 |    .9772338    .0475806     -0.47    0.636      .8882889     1.075085
     ip89c01 |     .971004    .0477644     -0.60    0.550      .8817588     1.069282
     ip89c02 |    .9668112    .0542303     -0.60    0.547      .8661561     1.079163
     ip89c03 |     .935775    .0533551     -1.16    0.244      .8368323     1.046416
     ip89c04 |    .9337091    .0538703     -1.19    0.235      .8338763     1.045494
     ip90c00 |    1.140349    .0584974      2.56    0.010      1.031272     1.260964
     ip90c01 |    1.130447    .0570558      2.43    0.015      1.023973     1.247992
     ip90c02 |    1.092466    .0574979      1.68    0.093      .9853901     1.211178
     ip90c03 |    1.124117    .0679332      1.94    0.053      .9985534      1.26547
     ip90c04 |    1.104558    .0686127      1.60    0.109      .9779432     1.247565
     ip91c00 |    1.205603    .0666836      3.38    0.001       1.08174     1.343648
     ip91c01 |    1.197907    .0648716      3.33    0.001      1.077276     1.332046
     ip91c02 |    1.149928    .0613679      2.62    0.009      1.035726     1.276723
     ip91c03 |    1.160843    .0699948      2.47    0.013      1.031452     1.306466
     ip91c04 |      1.1533    .0607906      2.71    0.007      1.040101      1.27882
     ip92c00 |    1.307213    .0617704      5.67    0.000      1.191583     1.434064
     ip92c01 |    1.253043    .0608984      4.64    0.000      1.139193     1.378271
     ip92c02 |     1.21534     .058505      4.05    0.000      1.105915     1.335591
     ip92c03 |    1.213776    .0539468      4.36    0.000      1.112517     1.324252
     ip92c04 |    1.181871    .0581692      3.40    0.001      1.073188     1.301561
     ip93c00 |    1.263251    .0565047      5.22    0.000      1.157219     1.378998
     ip93c01 |    1.273647      .05441      5.66    0.000      1.171348      1.38488
     ip93c02 |    1.253278    .0503749      5.62    0.000      1.158334     1.356004
     ip93c03 |    1.243394    .0495364      5.47    0.000      1.149998     1.344375
     ip93c04 |    1.261977    .0467971      6.27    0.000       1.17351     1.357113
     ip94c00 |    1.373674    .0710269      6.14    0.000      1.241286     1.520183
     ip94c01 |    1.400472    .0637209      7.40    0.000      1.280988     1.531101
     ip94c02 |    1.305584    .0593441      5.87    0.000      1.194302     1.427235
     ip94c03 |    1.357748    .0671017      6.19    0.000        1.2324     1.495845
     ip94c04 |    1.349582    .0671158      6.03    0.000      1.224245     1.487751
     ip95c00 |    1.336188    .0705318      5.49    0.000      1.204859     1.481832
     ip95c01 |    1.384511    .0708824      6.35    0.000      1.252327     1.530648
     ip95c02 |    1.370093     .067989      6.35    0.000      1.243112     1.510045
     ip95c03 |    1.424393     .072208      6.98    0.000      1.289671     1.573187
     ip95c04 |    1.439485    .0712284      7.36    0.000      1.306436     1.586084
       d1c95 |    1.002916    .0400752      0.07    0.942      .9273666     1.084619
       d1c00 |    1.035884    .0217449      1.68    0.093      .9941296     1.079392
       d2c95 |    1.025782    .0442113      0.59    0.555      .9426888       1.1162
       d2c00 |    1.143697    .0449984      3.41    0.001      1.058817     1.235382
-------------+----------------------------------------------------------------
Wald chi2(149) =  8.5e+13                                Prob > chi2 =   0.0000

.  * Column 3: Volume fixed effects, no age profile;
. xtpqml cit ip* d1c* d2c*, i(volume) irr fe cluster(journal);
warning: existing panel variable is not volume
note: 18 groups (273 obs) dropped because of all zero outcomes

Iteration 0:   log likelihood = -109648.95
Iteration 1:   log likelihood = -60415.327
Iteration 2:   log likelihood =  -56335.18
Iteration 3:   log likelihood = -56186.374
Iteration 4:   log likelihood = -56186.308
Iteration 5:   log likelihood = -56186.308

Conditional fixed-effects Poisson regression    Number of obs     =     14,789
Group variable: volume                          Number of groups  =        957

                                                Obs per group:
                                                              min =         11
                                                              avg =       15.5
                                                              max =         20

                                                Wald chi2(149)    =   58335.23
Log likelihood  = -56186.308                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip86c86 |   -1.840428    .0442496    -41.59    0.000     -1.927156      -1.7537
     ip86c87 |   -.4035106    .0260974    -15.46    0.000     -.4546606    -.3523607
     ip86c88 |    .1494864    .0226269      6.61    0.000      .1051386     .1938342
     ip86c89 |    .2687187    .0220508     12.19    0.000         .2255     .3119374
     ip86c90 |    .3571687    .0216571     16.49    0.000      .3147215     .3996159
     ip86c91 |     .350823    .0216844     16.18    0.000      .3083223     .3933238
     ip86c92 |    .3560518    .0216619     16.44    0.000      .3135952     .3985084
     ip86c93 |    .3436828    .0217154     15.83    0.000      .3011215     .3862442
     ip86c94 |     .314601    .0218431     14.40    0.000      .2717893     .3574127
     ip86c95 |    .3040825    .0218898     13.89    0.000      .2611792     .3469858
     ip86c96 |    .3819932    .0215806     17.70    0.000      .3396959     .4242904
     ip86c97 |    .2702348    .0220146     12.28    0.000      .2270869     .3133827
     ip86c98 |    .2485124    .0221178     11.24    0.000      .2051624     .2918624
     ip86c99 |    .2180064    .0222764      9.79    0.000      .1743454     .2616674
     ip87c87 |   -1.984397    .0476755    -41.62    0.000      -2.07784    -1.890955
     ip87c88 |   -.3635173    .0260985    -13.93    0.000     -.4146694    -.3123651
     ip87c89 |    .1526296    .0228683      6.67    0.000      .1078086     .1974507
     ip87c90 |    .3274699    .0220318     14.86    0.000      .2842883     .3706515
     ip87c91 |    .3860688    .0217764     17.73    0.000      .3433878     .4287499
     ip87c92 |    .4046202    .0216981     18.65    0.000      .3620928     .4471476
     ip87c93 |     .420687    .0216311     19.45    0.000      .3782908     .4630832
     ip87c94 |    .3504013    .0219305     15.98    0.000      .3074184     .3933842
     ip87c95 |    .3778609    .0219064     17.25    0.000      .3349251     .4207967
     ip87c96 |     .410623    .0216999     18.92    0.000       .368092     .4531541
     ip87c97 |    .3131677    .0221145     14.16    0.000       .269824     .3565113
     ip87c98 |    .2915749    .0222249     13.12    0.000       .248015     .3351348
     ip87c99 |    .2665332    .0223594     11.92    0.000      .2227096     .3103568
     ip88c88 |   -1.848742    .0427116    -43.28    0.000     -1.932456    -1.765029
     ip88c89 |   -.5046686    .0259046    -19.48    0.000     -.5554408    -.4538964
     ip88c90 |     .109571    .0220076      4.98    0.000      .0664369     .1527051
     ip88c91 |    .2048211    .0215484      9.51    0.000      .1625869     .2470553
     ip88c92 |    .3196424    .0210387     15.19    0.000      .2784073     .3608776
     ip88c93 |     .347962      .02092     16.63    0.000      .3069596     .3889644
     ip88c94 |    .3208906    .0210334     15.26    0.000      .2796658     .3621153
     ip88c95 |    .3841972    .0209281     18.36    0.000      .3431789     .4252155
     ip88c96 |    .3878709    .0207702     18.67    0.000      .3471622     .4285797
     ip88c97 |    .3114188    .0210967     14.76    0.000      .2700702     .3527675
     ip88c98 |    .3257022    .0210423     15.48    0.000      .2844601     .3669443
     ip88c99 |    .2570441    .0213608     12.03    0.000      .2151776     .2989106
     ip89c89 |   -2.248981    .0471634    -47.68    0.000     -2.341419    -2.156542
     ip89c90 |   -.5710279    .0245841    -23.23    0.000     -.6192118    -.5228441
     ip89c91 |   -.0499868    .0212908     -2.35    0.019      -.091716    -.0082576
     ip89c92 |     .125091    .0204405      6.12    0.000      .0850285     .1651536
     ip89c93 |    .2081536    .0200756     10.37    0.000      .1688061      .247501
     ip89c94 |    .2227252     .020014     11.13    0.000      .1834984     .2619519
     ip89c95 |    .2672076    .0199318     13.41    0.000      .2281421     .3062732
     ip89c96 |    .2949863    .0197284     14.95    0.000      .2563193     .3336532
     ip89c97 |    .1912322    .0201761      9.48    0.000      .1516878     .2307767
     ip89c98 |    .2011332    .0201488      9.98    0.000      .1616423     .2406241
     ip89c99 |    .2050858    .0201547     10.18    0.000      .1655834     .2445883
     ip90c90 |   -2.083334    .0409097    -50.93    0.000     -2.163515    -2.003152
     ip90c91 |   -.6941112    .0239338    -29.00    0.000     -.7410206    -.6472017
     ip90c92 |   -.1136204    .0202946     -5.60    0.000     -.1533971    -.0738436
     ip90c93 |    .0854685    .0193636      4.41    0.000      .0475166     .1234204
     ip90c94 |    .1759519    .0189855      9.27    0.000      .1387411     .2131627
     ip90c95 |    .2241446    .0188675     11.88    0.000      .1871649     .2611243
     ip90c96 |    .3000397    .0184981     16.22    0.000      .2637841     .3362953
     ip90c97 |    .2137466    .0188482     11.34    0.000      .1768047     .2506884
     ip90c98 |    .2161545    .0188523     11.47    0.000      .1792047     .2531042
     ip90c99 |    .2054506    .0189235     10.86    0.000      .1683613     .2425399
     ip91c91 |   -2.116079     .040361    -52.43    0.000     -2.195185    -2.036973
     ip91c92 |   -.6911969    .0232918    -29.68    0.000     -.7368481    -.6455457
     ip91c93 |   -.1054771    .0197475     -5.34    0.000     -.1441816    -.0667726
     ip91c94 |    .0511336    .0190314      2.69    0.007      .0138327     .0884345
     ip91c95 |    .1522236    .0186844      8.15    0.000      .1156029     .1888443
     ip91c96 |    .2380084    .0182533     13.04    0.000      .2022325     .2737843
     ip91c97 |    .1831737    .0185104      9.90    0.000       .146894     .2194533
     ip91c98 |    .2224167    .0183769     12.10    0.000      .1863986     .2584347
     ip91c99 |    .2179794    .0184297     11.83    0.000      .1818578     .2541011
     ip92c92 |   -2.130007    .0402149    -52.97    0.000     -2.208826    -2.051187
     ip92c93 |   -.6601743    .0228447    -28.90    0.000      -.704949    -.6153995
     ip92c94 |   -.1619895    .0198375     -8.17    0.000     -.2008704    -.1231086
     ip92c95 |    .1169833    .0186427      6.28    0.000      .0804442     .1535224
     ip92c96 |    .2362672    .0181248     13.04    0.000      .2007433     .2717911
     ip92c97 |    .2155006    .0182084     11.84    0.000      .1798128     .2511883
     ip92c98 |    .2467503    .0181413     13.60    0.000      .2111939     .2823067
     ip92c99 |    .2262663    .0182257     12.41    0.000      .1905446     .2619879
     ip93c93 |   -2.066244    .0383095    -53.94    0.000     -2.141329    -1.991159
     ip93c94 |   -.8011351    .0234462    -34.17    0.000     -.8470888    -.7551814
     ip93c95 |   -.1739181    .0196214     -8.86    0.000     -.2123754    -.1354609
     ip93c96 |    .1085315    .0182889      5.93    0.000      .0726859      .144377
     ip93c97 |    .1234517    .0182324      6.77    0.000      .0877169     .1591866
     ip93c98 |    .1872537    .0179842     10.41    0.000      .1520053     .2225021
     ip93c99 |    .2075494     .017954     11.56    0.000      .1723601     .2427386
     ip94c94 |   -2.293241    .0401523    -57.11    0.000     -2.371938    -2.214544
     ip94c95 |   -.8344562    .0226247    -36.88    0.000     -.8787998    -.7901127
     ip94c96 |   -.1868559    .0187138     -9.98    0.000     -.2235343    -.1501775
     ip94c97 |   -.0212672    .0179784     -1.18    0.237     -.0565042     .0139699
     ip94c98 |    .1155029    .0174376      6.62    0.000      .0813258       .14968
     ip94c99 |      .14575    .0173241      8.41    0.000      .1117954     .1797045
     ip95c95 |   -2.283949    .0394835    -57.85    0.000     -2.361336    -2.206563
     ip95c96 |   -.8878582    .0224806    -39.49    0.000     -.9319194    -.8437971
     ip95c97 |   -.3146257    .0189115    -16.64    0.000     -.3516916    -.2775598
     ip95c98 |   -.0662511    .0178901     -3.70    0.000      -.101315    -.0311872
     ip95c99 |    .0311279    .0175157      1.78    0.076     -.0032022      .065458
     ip86c00 |    .1768877    .0217256      8.14    0.000      .1343063     .2194691
     ip86c01 |    .1290262    .0217996      5.92    0.000      .0862997     .1717526
     ip86c02 |    .0862597    .0216538      3.98    0.000       .043819     .1287005
     ip86c03 |    .0905992    .0214799      4.22    0.000      .0484993      .132699
     ip86c04 |    .0728234    .0215657      3.38    0.001      .0305554     .1150914
     ip87c00 |    .1462202     .021768      6.72    0.000      .1035558     .1888846
     ip87c01 |    .1320191     .021783      6.06    0.000      .0893252      .174713
     ip87c02 |    .0978698      .02183      4.48    0.000      .0550837     .1406558
     ip87c03 |    .0519255    .0219405      2.37    0.018      .0089228     .0949281
     ip87c04 |    .0956533    .0217073      4.41    0.000      .0531078     .1381989
     ip88c00 |    .1644879    .0205749      7.99    0.000      .1241618     .2048141
     ip88c01 |    .1417156     .020638      6.87    0.000      .1012659     .1821653
     ip88c02 |    .1233445    .0206644      5.97    0.000       .082843     .1638461
     ip88c03 |    .1029056    .0205782      5.00    0.000       .062573     .1432382
     ip88c04 |    .0761552    .0207074      3.68    0.000      .0355695     .1167409
     ip89c00 |     .088011    .0193335      4.55    0.000       .050118      .125904
     ip89c01 |    .0818098    .0193197      4.23    0.000      .0439438     .1196757
     ip89c02 |    .0809831    .0192487      4.21    0.000      .0432564     .1187099
     ip89c03 |    .0555041    .0192432      2.88    0.004      .0177881     .0932201
     ip89c04 |    .0535831    .0192485      2.78    0.005      .0158567     .0913094
     ip90c00 |    .1230271    .0178803      6.88    0.000      .0879824     .1580717
     ip90c01 |    .1145173    .0178926      6.40    0.000      .0794485      .149586
     ip90c02 |    .0831603    .0179417      4.64    0.000      .0479952     .1183253
     ip90c03 |    .1190421    .0176762      6.73    0.000      .0843975     .1536867
     ip90c04 |    .1015373    .0177425      5.72    0.000      .0667626     .1363119
     ip91c00 |    .1179905    .0173533      6.80    0.000      .0839786     .1520023
     ip91c01 |    .1124228     .017353      6.48    0.000      .0784116     .1464341
     ip91c02 |    .0741373    .0174764      4.24    0.000      .0398841     .1083905
     ip91c03 |    .0917598    .0172717      5.31    0.000       .057908     .1256117
     ip91c04 |    .0853629     .017293      4.94    0.000      .0514692     .1192565
     ip92c00 |    .1856154    .0169663     10.94    0.000       .152362     .2188687
     ip92c01 |    .1440955    .0170986      8.43    0.000       .110583     .1776081
     ip92c02 |    .1150615    .0171586      6.71    0.000      .0814312     .1486918
     ip92c03 |     .119966    .0170161      7.05    0.000       .086615      .153317
     ip92c04 |    .0933674    .0171159      5.45    0.000      .0598208      .126914
     ip93c00 |    .1091385    .0169069      6.46    0.000      .0760016     .1422754
     ip93c01 |    .1186596    .0167987      7.06    0.000      .0857347     .1515845
     ip93c02 |     .102799    .0168169      6.11    0.000      .0698384     .1357596
     ip93c03 |    .0992118    .0167189      5.93    0.000      .0664433     .1319803
     ip93c04 |    .1139576    .0166553      6.84    0.000      .0813138     .1466015
     ip94c00 |    .0824542     .016092      5.12    0.000      .0509144      .113994
     ip94c01 |    .1025927    .0159462      6.43    0.000      .0713388     .1338466
     ip94c02 |    .0338038    .0161846      2.09    0.037      .0020826      .065525
     ip94c03 |    .0780136    .0159081      4.90    0.000      .0468343     .1091928
     ip94c04 |    .0720604    .0159313      4.52    0.000      .0408355     .1032852
     ip95c00 |   -.0260729    .0160078     -1.63    0.103     -.0574476     .0053019
     ip95c01 |    .0153444    .0157901      0.97    0.331     -.0156037     .0462925
     ip95c02 |    .0055274    .0158129      0.35    0.727     -.0254654     .0365201
     ip95c03 |    .0442546    .0156605      2.83    0.005      .0135607     .0749486
     ip95c04 |    .0550107    .0156163      3.52    0.000      .0244034      .085618
       d1c95 |   -.0501128    .0071024     -7.06    0.000     -.0640333    -.0361923
       d1c00 |    .0340625     .009289      3.67    0.000      .0158564     .0522685
       d2c95 |   -.0269816    .0051658     -5.22    0.000     -.0371063    -.0168568
       d2c00 |    .1033652    .0066324     15.58    0.000       .090366     .1163644
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     ip86c86 |    .1587495    .0217401    -13.44    0.000       .121379     .2076256
     ip86c87 |    .6679709    .0566585     -4.76    0.000      .5656622     .7887838
     ip86c88 |    1.161238    .0911523      1.90    0.057      .9956469     1.354369
     ip86c89 |    1.308287     .099079      3.55    0.000       1.12782     1.517631
     ip86c90 |    1.429277     .108741      4.69    0.000      1.231278     1.659116
     ip86c91 |    1.420236    .1018326      4.89    0.000      1.234038     1.634529
     ip86c92 |    1.427682    .0958716      5.30    0.000      1.251617     1.628513
     ip86c93 |    1.410131    .0920969      5.26    0.000        1.2407       1.6027
     ip86c94 |    1.369713    .0808209      5.33    0.000      1.220123     1.537642
     ip86c95 |    1.355381    .0807868      5.10    0.000      1.205941      1.52334
     ip86c96 |    1.465202    .0783542      7.14    0.000      1.319405      1.62711
     ip86c97 |    1.310272    .0703866      5.03    0.000      1.179331     1.455751
     ip86c98 |    1.282117    .0628127      5.07    0.000      1.164732     1.411332
     ip86c99 |    1.243595    .0626399      4.33    0.000      1.126689     1.372632
     ip87c87 |    .1374634    .0157952    -17.27    0.000      .1097438     .1721847
     ip87c88 |    .6952267     .055147     -4.58    0.000      .5951236     .8121678
     ip87c89 |    1.164893    .0809622      2.20    0.028      1.016544     1.334892
     ip87c90 |    1.387453    .0839442      5.41    0.000      1.232306     1.562133
     ip87c91 |    1.471186    .0847458      6.70    0.000       1.31412     1.647024
     ip87c92 |    1.498733    .0780511      7.77    0.000      1.353304      1.65979
     ip87c93 |    1.523007    .0764873      8.38    0.000      1.380237     1.680546
     ip87c94 |    1.419637    .0726793      6.84    0.000      1.284102     1.569478
     ip87c95 |     1.45916    .0680617      8.10    0.000      1.331678     1.598846
     ip87c96 |    1.507757    .0743998      8.32    0.000      1.368766     1.660862
     ip87c97 |    1.367751     .063138      6.78    0.000      1.249436      1.49727
     ip87c98 |    1.338534    .0539185      7.24    0.000       1.23692     1.448496
     ip87c99 |    1.305431    .0540379      6.44    0.000      1.203701     1.415758
     ip88c88 |     .157435    .0184043    -15.81    0.000      .1251973     .1979738
     ip88c89 |    .6037056     .047848     -6.37    0.000      .5168462     .7051623
     ip88c90 |    1.115799    .0671015      1.82    0.068      .9917378      1.25538
     ip88c91 |    1.227306    .0726721      3.46    0.001      1.092825     1.378335
     ip88c92 |    1.376635    .0798715      5.51    0.000      1.228663     1.542429
     ip88c93 |    1.416178    .0738309      6.67    0.000       1.27862     1.568536
     ip88c94 |    1.378355    .0665625      6.64    0.000      1.253878     1.515188
     ip88c95 |    1.468435    .0709938      7.95    0.000      1.335679     1.614386
     ip88c96 |     1.47384    .0714833      8.00    0.000      1.340188      1.62082
     ip88c97 |    1.365361    .0604014      7.04    0.000      1.251963      1.48903
     ip88c98 |    1.385003    .0625872      7.21    0.000       1.26761     1.513268
     ip88c99 |    1.293102    .0583602      5.70    0.000      1.183631     1.412698
     ip89c89 |    .1055067    .0148913    -15.93    0.000      .0800093     .1391296
     ip89c90 |    .5649444    .0494311     -6.53    0.000      .4759134     .6706308
     ip89c91 |     .951242    .0861551     -0.55    0.581        .79652     1.136018
     ip89c92 |    1.133252    .0898471      1.58    0.115      .9701544     1.323768
     ip89c93 |    1.231402    .0919669      2.79    0.005      1.063722     1.425515
     ip89c94 |    1.249477    .0851476      3.27    0.001      1.093256     1.428022
     ip89c95 |    1.306312    .0873351      4.00    0.000      1.145879     1.489207
     ip89c96 |    1.343108    .0771499      5.14    0.000      1.200098     1.503159
     ip89c97 |    1.210741    .0641552      3.61    0.000      1.091308     1.343244
     ip89c98 |    1.222788    .0594631      4.14    0.000      1.111624     1.345068
     ip89c99 |     1.22763    .0605443      4.16    0.000       1.11452      1.35222
     ip90c90 |    .1245144     .016072    -16.14    0.000      .0966827      .160358
     ip90c91 |    .4995182    .0477159     -7.27    0.000      .4142298     .6023673
     ip90c92 |    .8925967    .0681969     -1.49    0.137      .7684597     1.036787
     ip90c93 |    1.089227    .0787379      1.18    0.237      .9453377     1.255018
     ip90c94 |    1.192381     .075543      2.78    0.005      1.053143     1.350028
     ip90c95 |    1.251252    .0743109      3.77    0.000      1.113762     1.405714
     ip90c96 |    1.349912    .0656521      6.17    0.000      1.227179     1.484921
     ip90c97 |    1.238309    .0608024      4.35    0.000      1.124693     1.363402
     ip90c98 |    1.241294    .0521181      5.15    0.000      1.143235     1.347765
     ip90c99 |    1.228078    .0543398      4.64    0.000      1.126062     1.339337
     ip91c91 |    .1205032    .0141539    -18.02    0.000      .0957237     .1516973
     ip91c92 |    .5009761    .0380856     -9.09    0.000      .4316247     .5814705
     ip91c93 |    .8998951    .0610239     -1.56    0.120       .787898     1.027812
     ip91c94 |    1.052464    .0689618      0.78    0.435        .92562     1.196689
     ip91c95 |    1.164421    .0702942      2.52    0.012      1.034485     1.310677
     ip91c96 |     1.26872    .0707749      4.27    0.000      1.137318     1.415304
     ip91c97 |    1.201023    .0643799      3.42    0.001      1.081243     1.334072
     ip91c98 |    1.249092    .0659609      4.21    0.000      1.126276       1.3853
     ip91c99 |    1.243561    .0625542      4.33    0.000      1.126808     1.372413
     ip92c92 |    .1188365    .0119272    -21.22    0.000      .0976152     .1446713
     ip92c93 |    .5167613    .0307945    -11.08    0.000      .4597967     .5807833
     ip92c94 |    .8504501    .0463903     -2.97    0.003      .7642185     .9464118
     ip92c95 |    1.124101    .0510451      2.58    0.010      1.028377     1.228734
     ip92c96 |    1.266513    .0553932      5.40    0.000      1.162467     1.379871
     ip92c97 |    1.240483    .0522386      5.12    0.000      1.142208     1.347212
     ip92c98 |     1.27986    .0518642      6.09    0.000       1.18214     1.385657
     ip92c99 |     1.25391    .0470626      6.03    0.000       1.16498     1.349628
     ip93c93 |    .1266606    .0169179    -15.47    0.000      .0974873     .1645642
     ip93c94 |    .4488192     .028562    -12.59    0.000      .3961892     .5084407
     ip93c95 |    .8403657     .045359     -3.22    0.001      .7560046     .9341404
     ip93c96 |     1.11464    .0531349      2.28    0.023      1.015215     1.223803
     ip93c97 |    1.131395    .0538382      2.59    0.009      1.030646     1.241994
     ip93c98 |    1.205933    .0484212      4.66    0.000      1.114668     1.304671
     ip93c99 |    1.230658     .047889      5.33    0.000      1.140288     1.328191
     ip94c94 |    .1009388    .0104293    -22.19    0.000      .0824347     .1235966
     ip94c95 |    .4341105    .0271616    -13.34    0.000      .3840094     .4907481
     ip94c96 |    .8295632    .0477875     -3.24    0.001      .7409954     .9287172
     ip94c97 |    .9789574    .0418709     -0.50    0.619      .9002375     1.064561
     ip94c98 |    1.122438    .0502257      2.58    0.010       1.02819     1.225324
     ip94c99 |    1.156907    .0456618      3.69    0.000      1.070785     1.249955
     ip95c95 |     .101881    .0124109    -18.75    0.000       .080242     .1293555
     ip95c96 |    .4115362     .024307    -15.03    0.000      .3665495     .4620442
     ip95c97 |    .7300621    .0355988     -6.45    0.000        .66352     .8032774
     ip95c98 |    .9358959    .0397283     -1.56    0.119       .861181     1.017093
     ip95c99 |    1.031617    .0478413      0.67    0.502      .9419854     1.129778
     ip86c00 |    1.193497    .0463743      4.55    0.000       1.10598     1.287939
     ip86c01 |     1.13772    .0371269      3.95    0.000      1.067231     1.212865
     ip86c02 |    1.090089    .0300013      3.13    0.002      1.032846     1.150506
     ip86c03 |     1.09483    .0248371      3.99    0.000      1.047217     1.144608
     ip86c04 |    1.075541     .030787      2.54    0.011      1.016861     1.137607
     ip87c00 |    1.157451    .0345741      4.90    0.000      1.091633     1.227238
     ip87c01 |     1.14113    .0280012      5.38    0.000      1.087548     1.197353
     ip87c02 |    1.102819    .0296847      3.64    0.000      1.046146     1.162562
     ip87c03 |    1.053297    .0226773      2.41    0.016      1.009775     1.098695
     ip87c04 |    1.100378    .0254641      4.13    0.000      1.051584     1.151435
     ip88c00 |    1.178789    .0436386      4.44    0.000      1.096288     1.267499
     ip88c01 |    1.152249     .040361      4.05    0.000      1.075797     1.234134
     ip88c02 |    1.131274    .0342461      4.07    0.000      1.066105     1.200426
     ip88c03 |    1.108387    .0297373      3.84    0.000      1.051609      1.16823
     ip88c04 |     1.07913    .0281021      2.92    0.003      1.025433     1.135639
     ip89c00 |       1.092    .0435697      2.21    0.027      1.009859     1.180823
     ip89c01 |    1.085249    .0392231      2.26    0.024      1.011033     1.164914
     ip89c02 |    1.084353    .0324178      2.71    0.007      1.022641     1.149789
     ip89c03 |    1.057073    .0257604      2.28    0.023      1.007771     1.108788
     ip89c04 |    1.055045    .0235229      2.40    0.016      1.009933     1.102171
     ip90c00 |    1.130915    .0440587      3.16    0.002      1.047776     1.220651
     ip90c01 |    1.121332    .0398393      3.22    0.001      1.045905     1.202198
     ip90c02 |    1.086716    .0325364      2.78    0.005      1.024781     1.152394
     ip90c03 |    1.126417    .0234978      5.71    0.000      1.081291     1.173427
     ip90c04 |    1.106871    .0260873      4.31    0.000      1.056904     1.159201
     ip91c00 |    1.125233    .0386893      3.43    0.001      1.051902     1.203677
     ip91c01 |    1.118986    .0290708      4.33    0.000      1.063434     1.177439
     ip91c02 |    1.076955    .0285644      2.80    0.005        1.0224     1.134421
     ip91c03 |    1.096102     .028348      3.55    0.000      1.041925     1.153095
     ip91c04 |    1.089112    .0217032      4.28    0.000      1.047395     1.132491
     ip92c00 |    1.203959    .0335147      6.67    0.000      1.140031     1.271472
     ip92c01 |    1.154994    .0304925      5.46    0.000       1.09675     1.216332
     ip92c02 |    1.121942    .0271236      4.76    0.000      1.070021     1.176383
     ip92c03 |    1.127459    .0203372      6.65    0.000      1.088295     1.168032
     ip92c04 |    1.097865    .0238025      4.31    0.000       1.05219     1.145522
     ip93c00 |    1.115317    .0382772      3.18    0.001      1.042762      1.19292
     ip93c01 |    1.125987    .0317649      4.21    0.000      1.065418     1.189998
     ip93c02 |    1.108269    .0333643      3.41    0.001      1.044768     1.175629
     ip93c03 |      1.1043    .0228782      4.79    0.000      1.060358     1.150064
     ip93c04 |    1.120705    .0194192      6.58    0.000      1.083283     1.159419
     ip94c00 |    1.085949    .0404627      2.21    0.027       1.00947     1.168222
     ip94c01 |     1.10804    .0359788      3.16    0.002       1.03972     1.180849
     ip94c02 |    1.034382    .0305406      1.14    0.252      .9762222     1.096006
     ip94c03 |    1.081137    .0213523      3.95    0.000      1.040087     1.123808
     ip94c04 |     1.07472    .0234823      3.30    0.001      1.029667     1.121744
     ip95c00 |    .9742641    .0315909     -0.80    0.421      .9142736     1.038191
     ip95c01 |    1.015463    .0264154      0.59    0.555      .9649871     1.068579
     ip95c02 |    1.005543    .0273499      0.20    0.839      .9533416     1.060602
     ip95c03 |    1.045248    .0204851      2.26    0.024       1.00586      1.08618
     ip95c04 |    1.056552    .0235881      2.46    0.014      1.011317      1.10381
       d1c95 |    .9511221    .0203374     -2.34    0.019      .9120852     .9918298
       d1c00 |    1.034649    .0217564      1.62    0.105      .9928743     1.078182
       d2c95 |    .9733792     .021361     -1.23    0.219      .9324001     1.016159
       d2c00 |    1.108896    .0323173      3.55    0.000      1.047331     1.174081
-------------+----------------------------------------------------------------
Wald chi2(149) = -1.8e+16                                Prob > chi2 =   1.0000

.  * Column 4: Volume fixed effects and age profile;
. xtpqml cit ip* ia1j* ia2j* d1c* d2c*, i(volume) irr fe cluster(journal);
note: 18 groups (273 obs) dropped because of all zero outcomes
note: ia1journal49 dropped because of collinearity
note: ia2journal49 dropped because of collinearity

Iteration 0:   log likelihood = -109648.95
Iteration 1:   log likelihood = -53459.786
Iteration 2:   log likelihood = -48817.736
Iteration 3:   log likelihood = -48608.074
Iteration 4:   log likelihood = -48607.426
Iteration 5:   log likelihood = -48606.764
Iteration 6:   log likelihood = -48606.542
Iteration 7:   log likelihood = -48606.496
Iteration 8:   log likelihood = -48606.485
Iteration 9:   log likelihood = -48606.483
Iteration 10:  log likelihood = -48606.482
Iteration 11:  log likelihood = -48606.482
Iteration 12:  log likelihood = -48606.482

Conditional fixed-effects Poisson regression    Number of obs     =     14,789
Group variable: volume                          Number of groups  =        957

                                                Obs per group:
                                                              min =         11
                                                              avg =       15.5
                                                              max =         20

                                                Wald chi2(345)    =   69702.67
Log likelihood  = -48606.482                    Prob > chi2       =     0.0000

--------------+----------------------------------------------------------------
           cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
--------------+----------------------------------------------------------------
      ip86c86 |   -1.968389    .0485281    -40.56    0.000     -2.063502    -1.873275
      ip86c87 |   -.5580094    .0330269    -16.90    0.000      -.622741    -.4932778
      ip86c88 |   -.0308188     .030783     -1.00    0.317     -.0911524     .0295149
      ip86c89 |    .0642155    .0308898      2.08    0.038      .0036726     .1247585
      ip86c90 |      .13076     .031144      4.20    0.000      .0697188     .1918011
      ip86c91 |    .1053428    .0316215      3.33    0.001      .0433658     .1673197
      ip86c92 |     .094758    .0319311      2.97    0.003      .0321742     .1573417
      ip86c93 |     .070164    .0321156      2.18    0.029      .0072185     .1331094
      ip86c94 |    .0326958    .0321443      1.02    0.309     -.0303059     .0956975
      ip86c95 |    .0177974    .0318945      0.56    0.577     -.0447147     .0803095
      ip86c96 |    .0923615    .0312092      2.96    0.003      .0311925     .1535305
      ip86c97 |   -.0162678    .0307879     -0.53    0.597     -.0766108     .0440753
      ip86c98 |   -.0302107    .0299069     -1.01    0.312     -.0888271     .0284057
      ip86c99 |   -.0495666    .0288935     -1.72    0.086     -.1061968     .0070636
      ip87c87 |   -2.056942    .0511864    -40.19    0.000     -2.157266    -1.956619
      ip87c88 |   -.4601244    .0318857    -14.43    0.000     -.5226193    -.3976295
      ip87c89 |    .0321454    .0294178      1.09    0.275     -.0255125     .0898033
      ip87c90 |    .1831328    .0290639      6.30    0.000      .1261686     .2400971
      ip87c91 |    .2196373    .0292237      7.52    0.000        .16236     .2769147
      ip87c92 |    .2184946    .0294914      7.41    0.000      .1606925     .2762968
      ip87c93 |    .2177643    .0296741      7.34    0.000      .1596042     .2759244
      ip87c94 |    .1339652    .0299797      4.47    0.000      .0752061     .1927244
      ip87c95 |    .1466353    .0299282      4.90    0.000      .0879772     .2052934
      ip87c96 |    .1699958    .0295375      5.76    0.000      .1121034     .2278881
      ip87c97 |    .0696809    .0293701      2.37    0.018      .0121166     .1272453
      ip87c98 |    .0494317    .0287597      1.72    0.086     -.0069363     .1057998
      ip87c99 |    .0297247    .0279919      1.06    0.288     -.0251383     .0845877
      ip88c88 |   -1.930974    .0462993    -41.71    0.000     -2.021719    -1.840229
      ip88c89 |    -.611239    .0309559    -19.75    0.000     -.6719114    -.5505666
      ip88c90 |    -.021188    .0275655     -0.77    0.442     -.0752155     .0328395
      ip88c91 |    .0507445    .0272237      1.86    0.062     -.0026129      .104102
      ip88c92 |    .1442608    .0269691      5.35    0.000      .0914024     .1971191
      ip88c93 |    .1539481    .0270502      5.69    0.000      .1009307     .2069655
      ip88c94 |    .1114334    .0272599      4.09    0.000      .0580049     .1648619
      ip88c95 |    .1566505    .0272698      5.74    0.000      .1032026     .2100984
      ip88c96 |    .1498045    .0270533      5.54    0.000      .0967811     .2028279
      ip88c97 |    .0692698    .0270076      2.56    0.010      .0163359     .1222037
      ip88c98 |    .0836407      .02648      3.16    0.002      .0317408     .1355406
      ip88c99 |    .0192973    .0260822      0.74    0.459     -.0318228     .0704173
      ip89c89 |   -2.307582    .0501511    -46.01    0.000     -2.405877    -2.209288
      ip89c90 |   -.6510124    .0290885    -22.38    0.000     -.7080247    -.5940001
      ip89c91 |   -.1516621    .0258491     -5.87    0.000     -.2023254    -.1009988
      ip89c92 |    .0025806    .0249124      0.10    0.917     -.0462468      .051408
      ip89c93 |    .0664978     .024548      2.71    0.007      .0183846     .1146109
      ip89c94 |    .0642551      .02451      2.62    0.009      .0162164     .1122938
      ip89c95 |      .08796    .0245148      3.59    0.000      .0399118     .1360082
      ip89c96 |    .1026608    .0243152      4.22    0.000      .0550038     .1503178
      ip89c97 |   -.0088738    .0245312     -0.36    0.718      -.056954     .0392064
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 ia2journal32 |   -.0040215    .0003414    -11.78    0.000     -.0046906    -.0033525
 ia2journal33 |   -.0058738    .0003977    -14.77    0.000     -.0066532    -.0050944
 ia2journal34 |    -.005238    .0007019     -7.46    0.000     -.0066138    -.0038622
 ia2journal35 |   -.0009398    .0003854     -2.44    0.015     -.0016951    -.0001845
 ia2journal36 |   -.0040484    .0007001     -5.78    0.000     -.0054207    -.0026762
 ia2journal37 |   -.0043373    .0011894     -3.65    0.000     -.0066684    -.0020062
 ia2journal38 |   -.0036147    .0008918     -4.05    0.000     -.0053627    -.0018667
 ia2journal39 |   -.0037444    .0009101     -4.11    0.000     -.0055281    -.0019607
 ia2journal40 |    .0103356    .0020855      4.96    0.000       .006248     .0144232
 ia2journal41 |   -.0061043    .0007631     -8.00    0.000        -.0076    -.0046086
 ia2journal42 |   -.0029979    .0013666     -2.19    0.028     -.0056764    -.0003194
 ia2journal43 |   -.0021813    .0010491     -2.08    0.038     -.0042376     -.000125
 ia2journal44 |   -.0032862    .0010202     -3.22    0.001     -.0052856    -.0012867
 ia2journal45 |   -.0014567    .0008312     -1.75    0.080     -.0030859     .0001724
 ia2journal46 |   -.0020477     .001442     -1.42    0.156     -.0048741     .0007786
 ia2journal47 |   -.0022026    .0005878     -3.75    0.000     -.0033546    -.0010505
 ia2journal48 |    .0030214     .001439      2.10    0.036      .0002011     .0058418
 ia2journal50 |   -.0044946    .0005315     -8.46    0.000     -.0055364    -.0034529
 ia2journal51 |   -.0029688    .0010746     -2.76    0.006      -.005075    -.0008625
 ia2journal52 |    .0007065    .0008781      0.80    0.421     -.0010146     .0024276
 ia2journal53 |   -.0039247    .0010998     -3.57    0.000     -.0060804    -.0017691
 ia2journal54 |    .0017377    .0007476      2.32    0.020      .0002725     .0032029
 ia2journal55 |   -.0019017    .0009626     -1.98    0.048     -.0037884     -.000015
 ia2journal56 |    .0015227    .0009726      1.57    0.117     -.0003835     .0034288
 ia2journal57 |    .0018203    .0013266      1.37    0.170     -.0007798     .0044203
 ia2journal58 |   -.0019663    .0008956     -2.20    0.028     -.0037216    -.0002111
 ia2journal59 |    -.004566    .0006003     -7.61    0.000     -.0057426    -.0033894
 ia2journal60 |   -.0027271    .0009009     -3.03    0.002     -.0044928    -.0009615
 ia2journal61 |     .000183    .0013261      0.14    0.890      -.002416     .0027821
 ia2journal62 |   -.0046087    .0007409     -6.22    0.000     -.0060608    -.0031566
 ia2journal63 |   -.0017577    .0004144     -4.24    0.000     -.0025699    -.0009456
 ia2journal64 |    -.002926     .000798     -3.67    0.000       -.00449    -.0013621
 ia2journal65 |   -.0056204    .0007432     -7.56    0.000     -.0070771    -.0041637
 ia2journal66 |   -.0023737    .0004931     -4.81    0.000     -.0033401    -.0014073
 ia2journal67 |     .000194    .0006906      0.28    0.779     -.0011596     .0015476
 ia2journal68 |   -.0000907    .0003788     -0.24    0.811     -.0008331     .0006516
 ia2journal69 |   -.0013401    .0006162     -2.17    0.030     -.0025477    -.0001324
 ia2journal70 |    -.005472    .0007405     -7.39    0.000     -.0069233    -.0040207
 ia2journal71 |   -.0061475    .0009749     -6.31    0.000     -.0080583    -.0042367
 ia2journal72 |    -.002309    .0008141     -2.84    0.005     -.0039046    -.0007134
 ia2journal73 |   -.0003828    .0011244     -0.34    0.734     -.0025865     .0018209
 ia2journal74 |   -.0025176    .0005182     -4.86    0.000     -.0035333    -.0015019
 ia2journal75 |   -.0066373    .0007153     -9.28    0.000     -.0080392    -.0052353
 ia2journal76 |   -.0041553    .0004274     -9.72    0.000      -.004993    -.0033177
 ia2journal77 |   -.0023968    .0004581     -5.23    0.000     -.0032946    -.0014989
 ia2journal78 |   -.0046153     .000485     -9.52    0.000     -.0055659    -.0036647
 ia2journal79 |   -.0044991    .0008353     -5.39    0.000     -.0061363     -.002862
 ia2journal80 |   -.0025995     .000582     -4.47    0.000     -.0037402    -.0014588
 ia2journal81 |   -.0045761    .0009066     -5.05    0.000      -.006353    -.0027992
 ia2journal82 |    .0026921    .0013738      1.96    0.050     -4.85e-07     .0053847
 ia2journal83 |    .0001711    .0006856      0.25    0.803     -.0011726     .0015148
 ia2journal84 |    .0006542    .0007985      0.82    0.413     -.0009108     .0022193
 ia2journal85 |   -6.880426    268.5354     -0.03    0.980     -533.2001     519.4392
 ia2journal86 |   -.0077565    .0013728     -5.65    0.000     -.0104471    -.0050659
 ia2journal87 |   -.0086329     .000754    -11.45    0.000     -.0101108    -.0071551
 ia2journal88 |   -.0036714    .0009999     -3.67    0.000     -.0056312    -.0017115
 ia2journal89 |   -.0019218    .0011754     -1.64    0.102     -.0042255     .0003818
 ia2journal90 |   -.0015568    .0005904     -2.64    0.008     -.0027139    -.0003997
 ia2journal91 |    .0006047    .0012716      0.48    0.634     -.0018876     .0030969
 ia2journal92 |   -.0039673    .0012507     -3.17    0.002     -.0064187    -.0015159
 ia2journal93 |   -.0015478     .000501     -3.09    0.002     -.0025297    -.0005659
 ia2journal94 |    .0148103    .0011865     12.48    0.000      .0124849     .0171357
 ia2journal95 |   -.0036697    .0021257     -1.73    0.084      -.007836     .0004966
 ia2journal96 |   -.0001772    .0011226     -0.16    0.875     -.0023774      .002023
 ia2journal97 |    .0005647    .0014225      0.40    0.691     -.0022234     .0033528
 ia2journal98 |   -.0025354    .0010602     -2.39    0.017     -.0046134    -.0004574
 ia2journal99 |    .0026811    .0009458      2.83    0.005      .0008273      .004535
ia2journal100 |   -.0034743     .001102     -3.15    0.002     -.0056341    -.0013145
        d1c95 |   -.0359392    .0072945     -4.93    0.000     -.0502362    -.0216422
        d1c00 |    .0078031    .0095319      0.82    0.413      -.010879     .0264851
        d2c95 |   -.0097106    .0055715     -1.74    0.081     -.0206305     .0012093
        d2c00 |   -.0081873    .0074914     -1.09    0.274     -.0228702     .0064955
--------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
--------------+----------------------------------------------------------------
           cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
--------------+----------------------------------------------------------------
cit           |
      ip86c86 |    .1396817    .0165251    -16.64    0.000       .110774     .1761333
      ip86c87 |    .5723473    .0330867     -9.65    0.000      .5110374     .6410126
      ip86c88 |    .9696513    .0442018     -0.68    0.499      .8867748     1.060273
      ip86c89 |    1.066322    .0497205      1.38    0.168      .9731922     1.168364
      ip86c90 |    1.139694    .0558329      2.67    0.008      1.035353     1.254551
      ip86c91 |    1.111091    .0493189      2.37    0.018      1.018514     1.212084
      ip86c92 |    1.099393    .0401453      2.59    0.009      1.023459      1.18096
      ip86c93 |    1.072684    .0402723      1.87    0.062       .996586     1.154593
      ip86c94 |    1.033236    .0332454      1.02    0.310      .9700886     1.100494
      ip86c95 |    1.017957    .0324788      0.56    0.577      .9562491     1.083646
      ip86c96 |    1.096761    .0315402      3.21    0.001      1.036653     1.160354
      ip86c97 |    .9838638    .0351242     -0.46    0.649       .917375     1.055172
      ip86c98 |    .9702411    .0271275     -1.08    0.280      .9185027     1.024894
      ip86c99 |    .9516418    .0319682     -1.48    0.140      .8910033     1.016407
      ip87c87 |    .1278443    .0101561    -25.89    0.000      .1094109     .1493833
      ip87c88 |    .6312051    .0298139     -9.74    0.000      .5753941     .6924296
      ip87c89 |    1.032668     .039609      0.84    0.402      .9578817     1.113292
      ip87c90 |    1.200974     .039623      5.55    0.000      1.125772     1.281199
      ip87c91 |    1.245625    .0441167      6.20    0.000      1.162091     1.335164
      ip87c92 |    1.244202    .0400447      6.79    0.000       1.16814     1.325217
      ip87c93 |    1.243294    .0477337      5.67    0.000      1.153171      1.34046
      ip87c94 |    1.143353    .0415982      3.68    0.000      1.064661     1.227861
      ip87c95 |    1.157932    .0365795      4.64    0.000      1.088411     1.231892
      ip87c96 |      1.1853    .0475976      4.23    0.000      1.095587     1.282359
      ip87c97 |    1.072166    .0417133      1.79    0.073      .9934489      1.15712
      ip87c98 |    1.050674    .0344957      1.51    0.132       .985193     1.120507
      ip87c99 |    1.030171    .0302767      1.01    0.312      .9725064     1.091255
      ip88c88 |    .1450069    .0142971    -19.58    0.000      .1195264     .1759193
      ip88c89 |    .5426781    .0344231     -9.64    0.000      .4792354     .6145195
      ip88c90 |    .9790349    .0437375     -0.47    0.635      .8969569     1.068624
      ip88c91 |    1.052054    .0438916      1.22    0.224      .9694514     1.141695
      ip88c92 |    1.155185    .0499413      3.34    0.001      1.061335     1.257335
      ip88c93 |     1.16643    .0409019      4.39    0.000      1.088957     1.249416
      ip88c94 |    1.117879    .0348365      3.58    0.000      1.051644     1.188286
      ip88c95 |    1.169587    .0382199      4.79    0.000      1.097026     1.246947
      ip88c96 |    1.161607    .0420308      4.14    0.000      1.082082     1.246977
      ip88c97 |    1.071725    .0314547      2.36    0.018      1.011815     1.135183
      ip88c98 |    1.087238    .0335515      2.71    0.007      1.023428     1.155027
      ip88c99 |    1.019485    .0333958      0.59    0.556      .9560871     1.087086
      ip89c89 |    .0995015    .0120946    -18.98    0.000      .0784088     .1262684
      ip89c90 |    .5215175     .035267     -9.63    0.000      .4567803     .5954296
      ip89c91 |    .8592786    .0525695     -2.48    0.013      .7621818     .9687448
      ip89c92 |    1.002584    .0554356      0.05    0.963      .8996125     1.117342
      ip89c93 |    1.068759    .0575626      1.23    0.217      .9616886     1.187749
      ip89c94 |    1.066364     .052422      1.31    0.191      .9684138     1.174222
      ip89c95 |    1.091944    .0551798      1.74    0.082      .9889774     1.205632
      ip89c96 |    1.108115     .046831      2.43    0.015      1.020027     1.203811
      ip89c97 |    .9911654    .0395686     -0.22    0.824      .9165689     1.071833
      ip89c98 |    .9967817    .0362322     -0.09    0.929      .9282385     1.070386
      ip89c99 |    1.000341    .0384194      0.01    0.993      .9278047     1.078548
      ip90c90 |    .1261339    .0120836    -21.61    0.000       .104541     .1521867
      ip90c91 |    .4940533    .0292051    -11.93    0.000      .4400039      .554742
      ip90c92 |    .8611184    .0376905     -3.42    0.001      .7903262     .9382516
      ip90c93 |    1.025459    .0435275      0.59    0.554      .9435993     1.114421
      ip90c94 |    1.097154    .0422748      2.41    0.016      1.017348      1.18322
      ip90c95 |    1.119954    .0428677      2.96    0.003      1.039009     1.207205
      ip90c96 |    1.185314    .0457779      4.40    0.000      1.098903      1.27852
      ip90c97 |    1.070854    .0398684      1.84    0.066      .9954962     1.151916
      ip90c98 |    1.061415     .034698      1.82    0.068      .9955412     1.131648
      ip90c99 |     1.04191    .0394092      1.09    0.278       .967463     1.122086
      ip91c91 |    .1241698    .0113231    -22.88    0.000      .1038472     .1484695
      ip91c92 |    .5029593    .0237096    -14.58    0.000      .4585715     .5516437
      ip91c93 |    .8803099    .0343078     -3.27    0.001      .8155718     .9501867
      ip91c94 |    1.004297    .0430576      0.10    0.920      .9233538     1.092335
      ip91c95 |    1.078875    .0429382      1.91    0.056      .9979161     1.166402
      ip91c96 |    1.150581    .0460927      3.50    0.000      1.063697     1.244563
      ip91c97 |    1.068042     .043123      1.63    0.103      .9867798     1.155995
      ip91c98 |    1.094284    .0444152      2.22    0.026      1.010604     1.184892
      ip91c99 |    1.076831    .0399964      1.99    0.046      1.001224     1.158146
      ip92c92 |    .1215975    .0094119    -27.22    0.000      .1044816     .1415172
      ip92c93 |     .515581    .0230615    -14.81    0.000      .4723059     .5628211
      ip92c94 |    .8274962     .030146     -5.20    0.000      .7704712     .8887418
      ip92c95 |    1.059276    .0313217      1.95    0.051      .9996318     1.122479
      ip92c96 |    1.166654      .03999      4.50    0.000       1.09085     1.247726
      ip92c97 |    1.120978    .0332316      3.85    0.000      1.057701      1.18804
      ip92c98 |    1.136422    .0357233      4.07    0.000      1.068519      1.20864
      ip92c99 |    1.099567    .0315738      3.31    0.001      1.039393     1.163225
      ip93c93 |    .1306821    .0133549    -19.91    0.000      .1069617     .1596629
      ip93c94 |    .4527189    .0200559    -17.89    0.000      .4150683     .4937847
      ip93c95 |    .8207601     .029056     -5.58    0.000      .7657422     .8797311
      ip93c96 |     1.06336    .0369901      1.77    0.077      .9932766     1.138387
      ip93c97 |     1.05647    .0394687      1.47    0.141      .9818772      1.13673
      ip93c98 |    1.105125    .0332669      3.32    0.001      1.041809     1.172289
      ip93c99 |    1.108162    .0320417      3.55    0.000      1.047108     1.172777
      ip94c94 |    .1050825    .0084335    -28.07    0.000      .0897877     .1229827
      ip94c95 |     .438622    .0166443    -21.72    0.000      .4071834      .472488
      ip94c96 |    .8187533    .0241705     -6.77    0.000      .7727244      .867524
      ip94c97 |    .9443938    .0227905     -2.37    0.018      .9007652     .9901357
      ip94c98 |    1.060608    .0288976      2.16    0.031      1.005455     1.118785
      ip94c99 |    1.072793    .0279971      2.69    0.007      1.019299     1.129094
      ip95c95 |    .1057356    .0107548    -22.09    0.000      .0866249     .1290625
      ip95c96 |    .4159236    .0194964    -18.71    0.000      .3794142     .4559461
      ip95c97 |    .7188152    .0239385     -9.91    0.000       .673395      .767299
      ip95c98 |    .8967863    .0274793     -3.56    0.000      .8445133     .9522949
      ip95c99 |    .9665289    .0331977     -0.99    0.322      .9036043     1.033835
      ip86c00 |     .971475    .0247955     -1.13    0.257      .9240723     1.021309
      ip86c01 |    .9539711    .0240211     -1.87    0.061      .9080335     1.002233
      ip86c02 |    .9702463     .022781     -1.29    0.198      .9266082      1.01594
      ip86c03 |    1.021924    .0233569      0.95    0.343      .9771552     1.068743
      ip86c04 |    1.036623     .028812      1.29    0.196      .9816634      1.09466
      ip87c00 |     .996778    .0268676     -0.12    0.905      .9454852     1.050853
      ip87c01 |    1.000278    .0258669      0.01    0.991      .9508431     1.052283
      ip87c02 |    1.002403    .0237115      0.10    0.919      .9569903     1.049971
      ip87c03 |    .9957706    .0208221     -0.20    0.839       .955785     1.037429
      ip87c04 |    1.067775    .0254439      2.75    0.006      1.019053     1.118827
      ip88c00 |    1.015321    .0286301      0.54    0.590      .9607291     1.073014
      ip88c01 |    1.008227    .0293365      0.28    0.778      .9523373     1.067396
      ip88c02 |    1.020123    .0279823      0.73    0.468       .966727     1.076469
      ip88c03 |     1.04521    .0275904      1.68    0.094      .9925087     1.100709
      ip88c04 |     1.04553    .0264575      1.76    0.078      .9949392     1.098693
      ip89c00 |    .9737205    .0310269     -0.84    0.403      .9147689     1.036471
      ip89c01 |    .9779252    .0291844     -0.75    0.454      .9223655     1.036832
      ip89c02 |    1.001598    .0265781      0.06    0.952      .9508374     1.055069
      ip89c03 |    1.009512     .023238      0.41    0.681      .9649788     1.056101
      ip89c04 |    1.028754    .0228014      1.28    0.201      .9850212     1.074429
      ip90c00 |    1.041534    .0315147      1.34    0.179      .9815618      1.10517
      ip90c01 |    1.035584    .0310967      1.16    0.244      .9763941     1.098361
      ip90c02 |    1.022216     .027678      0.81    0.417      .9693821     1.077929
      ip90c03 |    1.087598    .0223957      4.08    0.000      1.044577      1.13239
      ip90c04 |    1.084745    .0257117      3.43    0.001      1.035503     1.136328
      ip91c00 |    1.060425    .0331518      1.88    0.061      .9973991     1.127433
      ip91c01 |    1.053802    .0264697      2.09    0.037      1.003178      1.10698
      ip91c02 |     1.02434    .0238662      1.03    0.302      .9786152     1.072202
      ip91c03 |    1.066706    .0274695      2.51    0.012      1.014203     1.121927
      ip91c04 |    1.071685    .0207519      3.58    0.000      1.031774     1.113139
      ip92c00 |    1.141536    .0286013      5.28    0.000      1.086833     1.198993
      ip92c01 |    1.092503    .0268716      3.60    0.000      1.041085     1.146461
      ip92c02 |     1.07024    .0249784      2.91    0.004      1.022386     1.120334
      ip92c03 |    1.099023    .0204517      5.07    0.000      1.059661     1.139848
      ip92c04 |     1.08052    .0236182      3.54    0.000      1.035206     1.127816
      ip93c00 |    1.080536    .0286152      2.92    0.003      1.025882     1.138101
      ip93c01 |    1.088624    .0231676      3.99    0.000       1.04415     1.134992
      ip93c02 |    1.075352    .0279428      2.80    0.005      1.021957     1.131538
      ip93c03 |    1.087674    .0208332      4.39    0.000      1.047598     1.129282
      ip93c04 |    1.108911    .0188873      6.07    0.000      1.072503     1.146554
      ip94c00 |    1.082533    .0274233      3.13    0.002      1.030097     1.137638
      ip94c01 |    1.098335    .0256263      4.02    0.000       1.04924     1.149728
      ip94c02 |    1.022677    .0228711      1.00    0.316      .9788183       1.0685
      ip94c03 |    1.079088    .0191656      4.29    0.000       1.04217     1.117313
      ip94c04 |    1.070361     .022617      3.22    0.001      1.026937      1.11562
      ip95c00 |    .9969154    .0250741     -0.12    0.902      .9489627     1.047291
      ip95c01 |    1.031891    .0213116      1.52    0.129      .9909547     1.074517
      ip95c02 |    1.013585    .0233049      0.59    0.557      .9689219     1.060306
      ip95c03 |    1.045627    .0186758      2.50    0.012      1.009656     1.082879
      ip95c04 |    1.053745    .0216875      2.54    0.011      1.012084      1.09712
  ia1journal2 |    .9873066    .0021225     -5.94    0.000      .9831552     .9914755
  ia1journal3 |    1.065908    .0024158     28.16    0.000      1.061183     1.070653
  ia1journal4 |    1.091462    .0012274     77.82    0.000      1.089059      1.09387
  ia1journal5 |    1.052381    .0013832     38.84    0.000      1.049673     1.055096
  ia1journal6 |    1.064962    .0007001     95.75    0.000      1.063591     1.066335
  ia1journal7 |    .9930592    .0015466     -4.47    0.000      .9900326     .9960951
  ia1journal8 |    1.048442    .0033067     15.00    0.000      1.041981     1.054943
  ia1journal9 |    1.047427     .002138     22.70    0.000      1.043245     1.051626
 ia1journal10 |     .894287     .001583    -63.12    0.000      .8911897      .897395
 ia1journal11 |    .9587181    .0012965    -31.17    0.000      .9561803     .9612627
 ia1journal12 |    .9743969    .0037065     -6.82    0.000      .9671594     .9816886
 ia1journal13 |      1.0431    .0011024     39.93    0.000      1.040942     1.045263
 ia1journal14 |    .9870838    .0008742    -14.68    0.000       .985372     .9887987
 ia1journal15 |      1.0164    .0028135      5.88    0.000      1.010901      1.02193
 ia1journal16 |    1.010151    .0011735      8.69    0.000      1.007854     1.012454
 ia1journal17 |    1.039847    .0017147     23.70    0.000      1.036492     1.043213
 ia1journal18 |    .7736636    .0024227    -81.95    0.000      .7689298     .7784266
 ia1journal19 |    .9842182    .0026785     -5.85    0.000      .9789824     .9894821
 ia1journal20 |    1.075748    .0019851     39.57    0.000      1.071864     1.079645
 ia1journal21 |    1.051608    .0013223     40.02    0.000       1.04902     1.054203
 ia1journal22 |    1.026859    .0022163     12.28    0.000      1.022524     1.031212
 ia1journal23 |    1.001665    .0024368      0.68    0.494         .9969     1.006452
 ia1journal24 |    1.005988     .002448      2.45    0.014      1.001201     1.010797
 ia1journal25 |    1.095433     .001488     67.10    0.000       1.09252     1.098353
 ia1journal26 |    1.079044    .0014913     55.04    0.000      1.076125      1.08197
 ia1journal27 |    1.164304    .0019175     92.37    0.000      1.160552     1.168068
 ia1journal28 |    .9739209    .0012945    -19.88    0.000       .971387     .9764615
 ia1journal29 |    .9036904    .0016742    -54.66    0.000       .900415     .9069778
 ia1journal30 |    1.092519     .002215     43.64    0.000      1.088186     1.096869
 ia1journal31 |    1.069931    .0029976     24.13    0.000      1.064072     1.075823
 ia1journal32 |    1.098716     .001243     83.21    0.000      1.096282     1.101155
 ia1journal33 |    1.138207    .0018082     81.49    0.000      1.134668     1.141756
 ia1journal34 |    1.164812    .0020457     86.87    0.000      1.160809     1.168829
 ia1journal35 |    1.028549    .0016735     17.30    0.000      1.025274     1.031834
 ia1journal36 |    1.060034    .0013055     47.34    0.000      1.057478     1.062596
 ia1journal37 |    .9873488    .0030166     -4.17    0.000      .9814539      .993279
 ia1journal38 |    1.018404    .0014446     12.86    0.000      1.015576     1.021239
 ia1journal39 |    1.127106    .0032709     41.23    0.000      1.120714     1.133536
 ia1journal40 |    .7251497    .0024319    -95.83    0.000      .7203988     .7299319
 ia1journal41 |    1.120549    .0013881     91.88    0.000      1.117832     1.123273
 ia1journal42 |    .9854924    .0030716     -4.69    0.000      .9794905     .9915311
 ia1journal43 |    1.029258    .0036924      8.04    0.000      1.022046     1.036521
 ia1journal44 |    1.010413    .0012354      8.47    0.000      1.007995     1.012838
 ia1journal45 |    .9936731    .0013285     -4.75    0.000      .9910727     .9962804
 ia1journal46 |    .9776814     .004306     -5.12    0.000      .9692781     .9861576
 ia1journal47 |    1.001102    .0028323      0.39    0.697      .9955657     1.006668
 ia1journal48 |    .8559643    .0029042    -45.84    0.000      .8502912     .8616753
 ia1journal50 |    1.106536    .0021931     51.08    0.000      1.102246     1.110843
 ia1journal51 |     1.03734    .0012754     29.82    0.000      1.034844     1.039843
 ia1journal52 |    .9417138    .0031026    -18.23    0.000      .9356523     .9478145
 ia1journal53 |    1.067771    .0036067     19.41    0.000      1.060726     1.074864
 ia1journal54 |    .9755736    .0023304    -10.35    0.000      .9710168     .9801518
 ia1journal55 |    1.012934    .0008454     15.40    0.000      1.011278     1.014592
 ia1journal56 |    .9501343    .0021745    -22.35    0.000      .9458818     .9544059
 ia1journal57 |    .8972439    .0027149    -35.83    0.000      .8919385     .9025809
 ia1journal58 |    1.003001    .0026896      1.12    0.264      .9977435     1.008287
 ia1journal59 |    1.059043     .003132     19.40    0.000      1.052922     1.065199
 ia1journal60 |    1.106424    .0037918     29.51    0.000      1.099017     1.113881
 ia1journal61 |    .8741437    .0027361    -42.97    0.000      .8687974     .8795229
 ia1journal62 |    1.060698    .0024252     25.77    0.000      1.055956     1.065462
 ia1journal63 |    1.053456    .0027137     20.22    0.000       1.04815     1.058788
 ia1journal64 |    1.048351    .0026996     18.34    0.000      1.043073     1.053656
 ia1journal65 |    1.112252     .005928     19.96    0.000      1.100694     1.123932
 ia1journal66 |    1.025477    .0028655      9.00    0.000      1.019876     1.031108
 ia1journal67 |    .9960943    .0026824     -1.45    0.146      .9908507     1.001366
 ia1journal68 |     1.00267    .0035118      0.76    0.446      .9958106     1.009577
 ia1journal69 |    1.023569    .0024762      9.63    0.000      1.018727     1.028434
 ia1journal70 |    1.061492    .0032696     19.37    0.000      1.055103      1.06792
 ia1journal71 |    1.037526    .0027743     13.78    0.000      1.032103     1.042977
 ia1journal72 |     1.02798    .0037529      7.56    0.000       1.02065     1.035361
 ia1journal73 |    .9982535    .0055446     -0.31    0.753      .9874452      1.00918
 ia1journal74 |    1.095859    .0038906     25.78    0.000       1.08826     1.103511
 ia1journal75 |    1.139015    .0044192     33.55    0.000      1.130387      1.14771
 ia1journal76 |     1.14079    .0020132     74.64    0.000      1.136851     1.144743
 ia1journal77 |     1.06828    .0011443     61.66    0.000       1.06604     1.070526
 ia1journal78 |    1.065329    .0036619     18.41    0.000      1.058175      1.07253
 ia1journal79 |    1.080992    .0026659     31.58    0.000      1.075779     1.086229
 ia1journal80 |    1.048369     .002742     18.06    0.000      1.043009     1.053757
 ia1journal81 |    1.156906    .0020916     80.62    0.000      1.152814     1.161013
 ia1journal82 |    .9548831    .0059089     -7.46    0.000      .9433718      .966535
 ia1journal83 |    .9997188    .0028822     -0.10    0.922      .9940858     1.005384
 ia1journal84 |    .9610986    .0012222    -31.20    0.000      .9587062      .963497
 ia1journal85 |    635.4374    323.4777     12.68    0.000       234.292     1723.408
 ia1journal86 |    1.117286    .0023899     51.85    0.000      1.112612      1.12198
 ia1journal87 |    1.114241     .004734     25.46    0.000      1.105001     1.123559
 ia1journal88 |    1.043119    .0032131     13.70    0.000       1.03684     1.049436
 ia1journal89 |    .9677299    .0030674    -10.35    0.000      .9617366     .9737606
 ia1journal90 |    .9606312    .0024057    -16.04    0.000      .9559277     .9653579
 ia1journal91 |     .946382    .0019013    -27.43    0.000      .9426629     .9501158
 ia1journal92 |    1.040109    .0041627      9.83    0.000      1.031982       1.0483
 ia1journal93 |    .9856732    .0021297     -6.68    0.000       .981508     .9898561
 ia1journal94 |    .7272787    .0032868    -70.46    0.000      .7208651     .7337494
 ia1journal95 |    1.016394    .0014987     11.03    0.000      1.013461     1.019335
 ia1journal96 |    .9937181    .0029175     -2.15    0.032      .9880163     .9994528
 ia1journal97 |    .9091833    .0030046    -28.81    0.000      .9033135     .9150913
 ia1journal98 |    .9660545    .0029954    -11.14    0.000      .9602015     .9719432
 ia1journal99 |    .9580783     .003285    -12.49    0.000      .9516614     .9645385
ia1journal100 |    1.030939    .0020756     15.13    0.000      1.026879     1.035015
  ia2journal2 |    .9983615    .0001634    -10.02    0.000      .9980412     .9986818
  ia2journal3 |    .9974969      .00012    -20.84    0.000      .9972618      .997732
  ia2journal4 |    .9959982    .0000695    -57.43    0.000       .995862     .9961345
  ia2journal5 |    .9979082    .0000649    -32.19    0.000       .997781     .9980355
  ia2journal6 |    .9973698    .0000301    -87.26    0.000      .9973108     .9974288
  ia2journal7 |    .9966217     .000085    -39.70    0.000      .9964552     .9967882
  ia2journal8 |    .9989716    .0001868     -5.50    0.000      .9986056     .9993377
  ia2journal9 |    .9953215    .0001631    -28.62    0.000      .9950019     .9956411
 ia2journal10 |    1.004621    .0000908     51.01    0.000      1.004443     1.004799
 ia2journal11 |    1.000983    .0000907     10.84    0.000      1.000805      1.00116
 ia2journal12 |    1.003113    .0003051     10.22    0.000      1.002515     1.003711
 ia2journal13 |    .9978786    .0000785    -26.98    0.000      .9977246     .9980325
 ia2journal14 |    .9995327    .0000473     -9.88    0.000        .99944     .9996254
 ia2journal15 |    .9994686    .0001669     -3.18    0.001      .9991415     .9997958
 ia2journal16 |    .9992887    .0000682    -10.42    0.000      .9991549     .9994224
 ia2journal17 |    .9972692    .0000782    -34.87    0.000       .997116     .9974225
 ia2journal18 |    1.007786    .0001659     47.13    0.000      1.007461     1.008111
 ia2journal19 |     .998348    .0001631    -10.12    0.000      .9980284     .9986677
 ia2journal20 |    .9927707    .0001293    -55.71    0.000      .9925174     .9930242
 ia2journal21 |     .997966    .0000617    -32.94    0.000      .9978451     .9980869
 ia2journal22 |    .9978127     .000133    -16.43    0.000       .997552     .9980734
 ia2journal23 |    .9987974    .0001508     -7.97    0.000      .9985018     .9990931
 ia2journal24 |    .9967617     .000155    -20.86    0.000       .996458     .9970656
 ia2journal25 |    .9956136    .0000661    -66.23    0.000       .995484     .9957431
 ia2journal26 |    .9977355    .0000673    -33.61    0.000      .9976036     .9978674
 ia2journal27 |    .9941644    .0000738    -78.80    0.000      .9940197     .9943092
 ia2journal28 |    1.001815    .0000765     23.76    0.000      1.001665     1.001965
 ia2journal29 |    1.001952    .0000967     20.20    0.000      1.001763     1.002142
 ia2journal30 |    .9967782    .0001359    -23.67    0.000      .9965119     .9970445
 ia2journal31 |    .9971086     .000214    -13.49    0.000      .9966892     .9975281
 ia2journal32 |    .9959866    .0000555    -72.16    0.000      .9958778     .9960953
 ia2journal33 |    .9941434    .0000845    -69.14    0.000      .9939779      .994309
 ia2journal34 |    .9947757    .0000864    -60.33    0.000      .9946064      .994945
 ia2journal35 |    .9990606    .0000868    -10.81    0.000      .9988905     .9992308
 ia2journal36 |    .9959597    .0000684    -58.94    0.000      .9958257     .9960938
 ia2journal37 |    .9956721     .000166    -26.02    0.000      .9953469     .9959974
 ia2journal38 |    .9963918    .0000693    -51.98    0.000      .9962561     .9965277
 ia2journal39 |    .9962626    .0001842    -20.25    0.000      .9959016     .9966237
 ia2journal40 |    1.010389    .0001821     57.34    0.000      1.010032     1.010746
 ia2journal41 |    .9939143    .0000661    -91.74    0.000      .9937847     .9940439
 ia2journal42 |    .9970066    .0001447    -20.66    0.000      .9967231     .9972902
 ia2journal43 |    .9978211    .0001994    -10.92    0.000      .9974303     .9982119
 ia2journal44 |    .9967192    .0000555    -59.02    0.000      .9966105      .996828
 ia2journal45 |    .9985443     .000082    -17.74    0.000      .9983837      .998705
 ia2journal46 |    .9979544    .0002785     -7.34    0.000      .9974086     .9985004
 ia2journal47 |    .9977999    .0001816    -12.11    0.000      .9974441     .9981558
 ia2journal48 |    1.003026    .0001852     16.36    0.000      1.002663     1.003389
 ia2journal50 |    .9955155    .0001339    -33.43    0.000      .9952531     .9957779
 ia2journal51 |    .9970356    .0000816    -36.26    0.000      .9968757     .9971956
 ia2journal52 |    1.000707    .0001973      3.58    0.000       1.00032     1.001093
 ia2journal53 |    .9960829    .0002324    -16.82    0.000      .9956275     .9965386
 ia2journal54 |    1.001739     .000154     11.30    0.000      1.001437     1.002041
 ia2journal55 |    .9981001    .0000454    -41.77    0.000      .9980111     .9981892
 ia2journal56 |    1.001524    .0001282     11.90    0.000      1.001273     1.001775
 ia2journal57 |    1.001822     .000132     13.82    0.000      1.001563     1.002081
 ia2journal58 |    .9980356    .0001683    -11.66    0.000      .9977058     .9983655
 ia2journal59 |    .9954444    .0001472    -30.87    0.000      .9951559      .995733
 ia2journal60 |    .9972766    .0002446    -11.12    0.000      .9967974      .997756
 ia2journal61 |    1.000183    .0001885      0.97    0.331      .9998137     1.000552
 ia2journal62 |    .9954019     .000129    -35.57    0.000      .9951492     .9956548
 ia2journal63 |    .9982438    .0001484    -11.82    0.000      .9979529     .9985348
 ia2journal64 |    .9970782    .0001628    -17.92    0.000      .9967591     .9973974
 ia2journal65 |    .9943954    .0002996    -18.65    0.000      .9938083     .9949828
 ia2journal66 |    .9976291    .0001539    -15.38    0.000      .9973275     .9979309
 ia2journal67 |    1.000194    .0001757      1.10    0.269      .9998497     1.000538
 ia2journal68 |    .9999093    .0001847     -0.49    0.623      .9995473     1.000271
 ia2journal69 |    .9986608    .0001309    -10.22    0.000      .9984043     .9989175
 ia2journal70 |    .9945429    .0001792    -30.37    0.000      .9941918     .9948942
 ia2journal71 |    .9938713    .0001617    -37.79    0.000      .9935545     .9941882
 ia2journal72 |    .9976937    .0002037    -11.31    0.000      .9972946     .9980929
 ia2journal73 |    .9996173     .000367     -1.04    0.297      .9988983     1.000337
 ia2journal74 |    .9974856     .000197    -12.75    0.000      .9970996     .9978717
 ia2journal75 |    .9933847    .0002162    -30.49    0.000       .992961     .9938086
 ia2journal76 |    .9958533    .0000973    -42.54    0.000      .9956627     .9960439
 ia2journal77 |    .9976061    .0000507    -47.16    0.000      .9975067     .9977055
 ia2journal78 |    .9953953    .0002007    -22.90    0.000      .9950021     .9957887
 ia2journal79 |     .995511    .0001591    -28.16    0.000      .9951993     .9958228
 ia2journal80 |    .9974039    .0001528    -16.97    0.000      .9971044     .9977034
 ia2journal81 |    .9954343    .0000974    -46.77    0.000      .9952435     .9956252
 ia2journal82 |    1.002696    .0004329      6.24    0.000      1.001848     1.003544
 ia2journal83 |    1.000171    .0001633      1.05    0.295       .999851     1.000491
 ia2journal84 |    1.000654    .0000607     10.79    0.000      1.000536     1.000773
 ia2journal85 |    .0010277    .0005159    -13.71    0.000      .0003842      .002749
 ia2journal86 |    .9922735    .0000984    -78.24    0.000      .9920807     .9924664
 ia2journal87 |    .9914042    .0001679    -50.98    0.000      .9910752     .9917333
 ia2journal88 |    .9963354    .0001926    -18.99    0.000       .995958     .9967129
 ia2journal89 |      .99808     .000149    -12.87    0.000      .9977879     .9983722
 ia2journal90 |    .9984444    .0001581     -9.83    0.000      .9981345     .9987544
 ia2journal91 |    1.000605    .0001117      5.42    0.000      1.000386     1.000824
 ia2journal92 |    .9960406     .000158    -25.01    0.000      .9957309     .9963503
 ia2journal93 |    .9984534    .0001222    -12.65    0.000       .998214      .998693
 ia2journal94 |     1.01492    .0002715     55.36    0.000      1.014388     1.015453
 ia2journal95 |     .996337    .0000895    -40.86    0.000      .9961617     .9965124
 ia2journal96 |    .9998229    .0001848     -0.96    0.338      .9994607     1.000185
 ia2journal97 |    1.000565    .0001401      4.03    0.000       1.00029      1.00084
 ia2journal98 |    .9974678    .0001702    -14.86    0.000      .9971344     .9978014
 ia2journal99 |    1.002685    .0001986     13.54    0.000      1.002296     1.003074
ia2journal100 |    .9965317    .0001175    -29.47    0.000      .9963015      .996762
        d1c95 |    .9646989     .019121     -1.81    0.070      .9279411     1.002913
        d1c00 |    1.007834    .0167502      0.47    0.639      .9755328     1.041204
        d2c95 |    .9903364    .0197733     -0.49    0.627        .95233      1.02986
        d2c00 |    .9918461    .0176061     -0.46    0.645      .9579322     1.026961
--------------+----------------------------------------------------------------
Wald chi2(345) =  4.7e+17                                Prob > chi2 =   0.0000

.  * Column 5: Evans replication, with journal volume fixed effects, citation lags;
. xtpqml cit cit_lag d1c* d2c*, i(volume) irr fe cluster(journal);
note: 19 groups (272 obs) dropped because of all zero outcomes

Iteration 0:   log likelihood = -68204.589
Iteration 1:   log likelihood = -55275.722
Iteration 2:   log likelihood =  -55176.11
Iteration 3:   log likelihood = -55176.074
Iteration 4:   log likelihood = -55176.074

Conditional fixed-effects Poisson regression    Number of obs     =     13,815
Group variable: volume                          Number of groups  =        956

                                                Obs per group:
                                                              min =         10
                                                              avg =       14.5
                                                              max =         19

                                                Wald chi2(5)      =   22474.76
Log likelihood  = -55176.074                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     cit_lag |    .0033727    .0000234    144.05    0.000      .0033268     .0034186
       d1c95 |   -.0040515    .0062761     -0.65    0.519     -.0163524     .0082493
       d1c00 |   -.0531337    .0073843     -7.20    0.000     -.0676067    -.0386606
       d2c95 |   -.0132835     .003988     -3.33    0.001     -.0210999    -.0054671
       d2c00 |   -.0401364    .0031222    -12.86    0.000     -.0462558     -.034017
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     cit_lag |    1.003378    .0004131      8.19    0.000      1.002569     1.004188
       d1c95 |    .9959567    .0194116     -0.21    0.835      .9586282     1.034739
       d1c00 |    .9482533    .0178789     -2.82    0.005      .9138508     .9839509
       d2c95 |    .9868043    .0165382     -0.79    0.428      .9549166     1.019757
       d2c00 |    .9606584    .0170667     -2.26    0.024      .9277839     .9946978
-------------+----------------------------------------------------------------
Wald chi2(5) =   114.59                                Prob > chi2 =   0.0000

. * Column 6: Combine citation lags with journal volumen fixed effects,
> * time effects, and age profiles;
.   xtpqml cit cit_lag ip* ia1j* ia2j* d1c* d2c*, i(volume) irr fe cluster(journal);
note: 19 groups (272 obs) dropped because of all zero outcomes
note: ip86c86 dropped because of collinearity
note: ip87c87 dropped because of collinearity
note: ip88c88 dropped because of collinearity
note: ip89c89 dropped because of collinearity
note: ip90c90 dropped because of collinearity
note: ip91c91 dropped because of collinearity
note: ip92c92 dropped because of collinearity
note: ip93c93 dropped because of collinearity
note: ip94c94 dropped because of collinearity
note: ip95c95 dropped because of collinearity
note: ia1journal49 dropped because of collinearity
note: ia2journal49 dropped because of collinearity

Iteration 0:   log likelihood = -68204.589
Iteration 1:   log likelihood = -45476.374
Iteration 2:   log likelihood = -44859.726
Iteration 3:   log likelihood = -44857.796
Iteration 4:   log likelihood = -44857.679
Iteration 5:   log likelihood = -44857.679

Conditional fixed-effects Poisson regression    Number of obs     =     13,815
Group variable: volume                          Number of groups  =        956

                                                Obs per group:
                                                              min =         10
                                                              avg =       14.5
                                                              max =         19

                                                Wald chi2(336)    =   38331.90
Log likelihood  = -44857.679                    Prob > chi2       =     0.0000

--------------+----------------------------------------------------------------
           cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
--------------+----------------------------------------------------------------
      cit_lag |    .0013187    .0000415     31.81    0.000      .0012375        .0014
      ip86c87 |   -.3455206    .0335206    -10.31    0.000     -.4112197    -.2798215
      ip86c88 |    .0878695    .0307468      2.86    0.004       .027607     .1481321
      ip86c89 |    .0869351     .030596      2.84    0.004       .026968     .1469021
      ip86c90 |    .1021689    .0308516      3.31    0.001      .0417008      .162637
      ip86c91 |    .0404312    .0314608      1.29    0.199     -.0212309     .1020934
      ip86c92 |    .0108673     .031858      0.34    0.733     -.0515732     .0733078
      ip86c93 |   -.0296965    .0321667     -0.92    0.356     -.0927421     .0333492
      ip86c94 |   -.0791601    .0322864     -2.45    0.014     -.1424402      -.01588
      ip86c95 |   -.0921564    .0320899     -2.87    0.004     -.1550513    -.0292614
      ip86c96 |   -.0241966    .0314498     -0.77    0.442     -.0858372     .0374439
      ip86c97 |   -.1501676    .0311359     -4.82    0.000     -.2111928    -.0891423
      ip86c98 |   -.1320795    .0301434     -4.38    0.000     -.1911594    -.0729995
      ip86c99 |   -.1442128    .0291096     -4.95    0.000     -.2012666    -.0871589
      ip87c88 |   -.2212546    .0326583     -6.77    0.000     -.2852637    -.1572455
      ip87c89 |     .165208    .0295343      5.59    0.000      .1073219     .2230941
      ip87c90 |     .224013    .0288761      7.76    0.000       .167417      .280609
      ip87c91 |    .2045511    .0290322      7.05    0.000       .147649     .2614531
      ip87c92 |    .1594673    .0293783      5.43    0.000      .1018868     .2170478
      ip87c93 |     .134251    .0296736      4.52    0.000      .0760918     .1924101
      ip87c94 |    .0239653    .0301109      0.80    0.426      -.035051     .0829817
      ip87c95 |    .0445728    .0300684      1.48    0.138     -.0143601     .1035057
      ip87c96 |    .0538335     .029796      1.81    0.071     -.0045656     .1122326
      ip87c97 |   -.0681298    .0297767     -2.29    0.022      -.126491    -.0097685
      ip87c98 |   -.0631169    .0290551     -2.17    0.030     -.1200639      -.00617
      ip87c99 |   -.0642516    .0282191     -2.28    0.023     -.1195601    -.0089432
      ip88c89 |   -.3745238    .0319029    -11.74    0.000     -.4370523    -.3119953
      ip88c90 |    .1227979    .0278771      4.40    0.000      .0681597      .177436
      ip88c91 |    .1034248    .0271569      3.81    0.000      .0501982     .1566514
      ip88c92 |     .156599    .0268401      5.83    0.000      .1039933     .2092047
      ip88c93 |    .1253787    .0269379      4.65    0.000      .0725814     .1781761
      ip88c94 |    .0581314    .0272212      2.14    0.033      .0047789      .111484
      ip88c95 |    .0906386    .0273021      3.32    0.001      .0371275     .1441498
      ip88c96 |     .066533    .0271821      2.45    0.014      .0132569      .119809
      ip88c97 |   -.0262481     .027212     -0.96    0.335     -.0795827     .0270865
      ip88c98 |   -.0010175    .0266761     -0.04    0.970     -.0533017     .0512668
      ip88c99 |   -.0689821    .0263089     -2.62    0.009     -.1205466    -.0174175
      ip89c90 |   -.3437939    .0308562    -11.14    0.000     -.4042708    -.2833169
      ip89c91 |    .0533104    .0267032      2.00    0.046       .000973     .1056478
      ip89c92 |    .1267744     .025184      5.03    0.000      .0774146     .1761342
      ip89c93 |    .1344301    .0245502      5.48    0.000      .0863126     .1825476
      ip89c94 |    .0875246    .0244105      3.59    0.000      .0396809     .1353682
      ip89c95 |     .085782     .024416      3.51    0.000      .0379275     .1336365
      ip89c96 |    .0860523    .0242459      3.55    0.000      .0385312     .1335733
      ip89c97 |   -.0490268    .0245235     -2.00    0.046      -.097092    -.0009616
      ip89c98 |   -.0329473    .0242216     -1.36    0.174     -.0804208     .0145262
      ip89c99 |   -.0351248    .0238344     -1.47    0.141     -.0818395     .0115898
      ip90c91 |   -.3652681    .0305952    -11.94    0.000     -.4252335    -.3053027
      ip90c92 |    .0957672    .0258735      3.70    0.000      .0450562     .1464782
      ip90c93 |    .1757506    .0237813      7.39    0.000      .1291402      .222361
      ip90c94 |    .1899023    .0228523      8.31    0.000      .1451125     .2346921
      ip90c95 |     .163088    .0224633      7.26    0.000      .1190607     .2071153
      ip90c96 |     .196117    .0219921      8.92    0.000      .1530133     .2392207
      ip90c97 |    .0534332    .0221826      2.41    0.016      .0099561     .0969103
      ip90c98 |    .0549251    .0220034      2.50    0.013      .0117993      .098051
      ip90c99 |    .0246333    .0218079      1.13    0.259     -.0181093     .0673759
      ip91c92 |   -.3273472    .0304094    -10.76    0.000     -.3869487    -.2677458
      ip91c93 |    .1312303     .025404      5.17    0.000      .0814394     .1810213
      ip91c94 |    .1705139    .0231721      7.36    0.000      .1250973     .2159304
      ip91c95 |    .1822189    .0219852      8.29    0.000      .1391287     .2253091
      ip91c96 |    .2047178    .0210699      9.72    0.000      .1634215      .246014
      ip91c97 |    .0878112    .0210182      4.18    0.000      .0466164      .129006
      ip91c98 |    .1097463      .02072      5.30    0.000      .0691357     .1503568
      ip91c99 |    .0724582    .0205685      3.52    0.000      .0321446     .1127717
      ip92c93 |    -.298186    .0302704     -9.85    0.000     -.3575149    -.2388571
      ip92c94 |    .0733437    .0254746      2.88    0.004      .0234143      .123273
      ip92c95 |    .2333868    .0226633     10.30    0.000      .1889675      .277806
      ip92c96 |    .2567641    .0209852     12.24    0.000      .2156339     .2978944
      ip92c97 |    .1687446    .0204181      8.26    0.000      .1287258     .2087634
      ip92c98 |    .1682354    .0200232      8.40    0.000      .1289906     .2074803
      ip92c99 |    .1129995    .0198424      5.69    0.000      .0741091       .15189
      ip93c94 |    -.411168    .0310582    -13.24    0.000     -.4720408    -.3502951
      ip93c95 |    .0899692    .0255398      3.52    0.000      .0399122     .1400262
      ip93c96 |    .2581798    .0223493     11.55    0.000      .2143759     .3019837
      ip93c97 |    .1738168     .020895      8.32    0.000      .1328634     .2147703
      ip93c98 |    .1963436    .0199934      9.82    0.000      .1571572       .23553
      ip93c99 |    .1622259    .0194492      8.34    0.000      .1241062     .2003455
      ip94c95 |    -.410481    .0307587    -13.35    0.000      -.470767    -.3501951
      ip94c96 |    .1097574    .0249571      4.40    0.000      .0608424     .1586724
      ip94c97 |     .149696    .0219789      6.81    0.000      .1066182     .1927739
      ip94c98 |     .204916    .0201078     10.19    0.000      .1655055     .2443265
      ip94c99 |    .1673283    .0190924      8.76    0.000      .1299079     .2047488
      ip95c96 |   -.4727542    .0306457    -15.43    0.000     -.5328187    -.4126897
      ip95c97 |   -.0207799    .0251365     -0.83    0.408     -.0700466     .0284868
      ip95c98 |    .1062721     .021949      4.84    0.000      .0632528     .1492914
      ip95c99 |    .1142503    .0200557      5.70    0.000      .0749419     .1535587
      ip86c00 |   -.1105088    .0272145     -4.06    0.000     -.1638483    -.0571692
      ip86c01 |   -.1194317    .0258551     -4.62    0.000     -.1701067    -.0687566
      ip86c02 |   -.0846113    .0242374     -3.49    0.000     -.1321156    -.0371069
      ip86c03 |   -.0134927    .0227773     -0.59    0.554     -.0581355     .0311501
      ip86c04 |    .0156909    .0219309      0.72    0.474     -.0272928     .0586747
      ip87c00 |   -.0854341    .0264297     -3.23    0.001     -.1372353     -.033633
      ip87c01 |   -.0686776    .0252459     -2.72    0.007     -.1181587    -.0191965
      ip87c02 |   -.0555991    .0240828     -2.31    0.021     -.1028006    -.0083976
      ip87c03 |   -.0419452    .0230681     -1.82    0.069     -.0871578     .0032674
      ip87c04 |    .0591593    .0220204      2.69    0.007          .016     .1023185
      ip88c00 |   -.0615148    .0245437     -2.51    0.012     -.1096196    -.0134101
      ip88c01 |    -.058552     .023624     -2.48    0.013     -.1048541    -.0122498
      ip88c02 |   -.0316116    .0226238     -1.40    0.162     -.0759534     .0127301
      ip88c03 |    .0010085    .0216037      0.05    0.963     -.0413341      .043351
      ip88c04 |    .0173737    .0210038      0.83    0.408     -.0237931     .0585404
      ip89c00 |   -.0668819     .022289     -3.00    0.003     -.1105676    -.0231961
      ip89c01 |   -.0584201    .0215833     -2.71    0.007     -.1007226    -.0161177
      ip89c02 |   -.0314788    .0207691     -1.52    0.130     -.0721854     .0092278
      ip89c03 |   -.0171849    .0200365     -0.86    0.391     -.0564557     .0220858
      ip89c04 |    .0136816    .0194764      0.70    0.482     -.0244914     .0518545
      ip90c00 |    .0259644    .0202017      1.29    0.199     -.0136302     .0655589
      ip90c01 |    .0142128    .0197083      0.72    0.471     -.0244149     .0528404
      ip90c02 |    .0022124    .0191757      0.12    0.908     -.0353714     .0397961
      ip90c03 |    .0751394    .0183284      4.10    0.000      .0392163     .1110625
      ip90c04 |    .0634724     .017945      3.54    0.000      .0283009     .0986439
      ip91c00 |    .0430586    .0190133      2.26    0.024      .0057932     .0803241
      ip91c01 |    .0294383    .0186761      1.58    0.115     -.0071661     .0660427
      ip91c02 |    .0009459    .0183972      0.05    0.959      -.035112     .0370037
      ip91c03 |     .054666    .0177587      3.08    0.002      .0198595     .0894725
      ip91c04 |    .0557438    .0174445      3.20    0.001      .0215533     .0899344
      ip92c00 |    .1361479    .0181229      7.51    0.000      .1006276     .1716681
      ip92c01 |    .0713708    .0180088      3.96    0.000      .0360742     .1066673
      ip92c02 |    .0554854    .0177937      3.12    0.002      .0206103     .0903605
      ip92c03 |    .0836583     .017355      4.82    0.000      .0496432     .1176735
      ip92c04 |    .0646021    .0172229      3.75    0.000      .0308458     .0983584
      ip93c00 |    .1154494    .0178351      6.47    0.000      .0804932     .1504056
      ip93c01 |    .1081915    .0174661      6.19    0.000      .0739587     .1424244
      ip93c02 |    .0832406    .0172613      4.82    0.000       .049409     .1170721
      ip93c03 |    .0887729    .0169521      5.24    0.000      .0555474     .1219983
      ip93c04 |    .1061815    .0167276      6.35    0.000       .073396      .138967
      ip94c00 |     .137513    .0170488      8.07    0.000       .104098     .1709281
      ip94c01 |    .1265245    .0165247      7.66    0.000      .0941368     .1589123
      ip94c02 |    .0356669    .0165193      2.16    0.031      .0032897     .0680442
      ip94c03 |    .1039711    .0160941      6.46    0.000      .0724273     .1355149
      ip94c04 |    .0670223    .0159798      4.19    0.000      .0357024     .0983422
      ip95c00 |    .0972517    .0173814      5.60    0.000      .0631848     .1313185
      ip95c01 |    .0940711    .0165119      5.70    0.000      .0617083     .1264338
      ip95c02 |    .0484311    .0161593      3.00    0.003      .0167595     .0801028
      ip95c03 |    .0711713    .0158217      4.50    0.000      .0401614     .1021813
      ip95c04 |    .0554908    .0156545      3.54    0.000      .0248085     .0861731
  ia1journal2 |    .0130206    .0098147      1.33    0.185     -.0062159     .0322571
  ia1journal3 |    .0576021    .0060644      9.50    0.000      .0457161     .0694882
  ia1journal4 |    .0947833    .0073205     12.95    0.000      .0804354     .1091312
  ia1journal5 |    .0936737    .0090897     10.31    0.000      .0758582     .1114892
  ia1journal6 |     .075581    .0063076     11.98    0.000      .0632184     .0879437
  ia1journal7 |    .0484856    .0134875      3.59    0.000      .0220506     .0749205
  ia1journal8 |    .1129838    .0148421      7.61    0.000      .0838939     .1420737
  ia1journal9 |    .1072258    .0177401      6.04    0.000      .0724558     .1419958
 ia1journal10 |   -.0474361    .0142143     -3.34    0.001     -.0752956    -.0195766
 ia1journal11 |    .0090393    .0090177      1.00    0.316     -.0086352     .0267137
 ia1journal12 |    .0397616    .0155515      2.56    0.011      .0092812     .0702419
 ia1journal13 |     .093123    .0089058     10.46    0.000      .0756679      .110578
 ia1journal14 |    .0271563    .0095629      2.84    0.005      .0084133     .0458993
 ia1journal15 |     .038661    .0068509      5.64    0.000      .0252336     .0520885
 ia1journal16 |    .0675515    .0136731      4.94    0.000      .0407526     .0943503
 ia1journal17 |    .1078877    .0121833      8.86    0.000      .0840089     .1317665
 ia1journal18 |   -.1808417    .0201219     -8.99    0.000     -.2202799    -.1414034
 ia1journal19 |    .0381941    .0187449      2.04    0.042      .0014547     .0749335
 ia1journal20 |    .1405443    .0217844      6.45    0.000      .0978478     .1832409
 ia1journal21 |    .1016126    .0095106     10.68    0.000      .0829722     .1202531
 ia1journal22 |    .1005008    .0125258      8.02    0.000      .0759507     .1250508
 ia1journal23 |    .0648975    .0132286      4.91    0.000      .0389699      .090825
 ia1journal24 |    .0742387    .0176288      4.21    0.000      .0396869     .1087906
 ia1journal25 |    .0871929    .0068794     12.67    0.000      .0737095     .1006763
 ia1journal26 |    .0985449    .0070793     13.92    0.000      .0846697       .11242
 ia1journal27 |    .1686831    .0079468     21.23    0.000      .1531077     .1842585
 ia1journal28 |    .0667684    .0145739      4.58    0.000      .0382041     .0953328
 ia1journal29 |   -.0178161    .0244299     -0.73    0.466     -.0656979     .0300657
 ia1journal30 |    .1553664    .0150962     10.29    0.000      .1257785     .1849543
 ia1journal31 |    .1321059    .0144113      9.17    0.000      .1038603     .1603515
 ia1journal32 |    .1050415    .0065246     16.10    0.000      .0922535     .1178294
 ia1journal33 |     .133853    .0073437     18.23    0.000      .1194597     .1482463
 ia1journal34 |    .2022052    .0131226     15.41    0.000      .1764853      .227925
 ia1journal35 |    .0592943    .0074373      7.97    0.000      .0447174     .0738712
 ia1journal36 |    .1305658    .0127273     10.26    0.000      .1056208     .1555108
 ia1journal37 |    .0481931    .0194414      2.48    0.013      .0100887     .0862976
 ia1journal38 |    .0840302    .0158762      5.29    0.000      .0529135      .115147
 ia1journal39 |    .1909956    .0175773     10.87    0.000      .1565447     .2254464
 ia1journal40 |   -.2665585    .0345704     -7.71    0.000     -.3343153    -.1988017
 ia1journal41 |    .1682122    .0142449     11.81    0.000      .1402926     .1961317
 ia1journal42 |    .0493288    .0226391      2.18    0.029       .004957     .0937007
 ia1journal43 |    .1094481    .0179398      6.10    0.000      .0742868     .1446095
 ia1journal44 |    .0735895    .0180284      4.08    0.000      .0382544     .1089245
 ia1journal45 |    .0585129     .015055      3.89    0.000      .0290057     .0880201
 ia1journal46 |     .039824     .023376      1.70    0.088      -.005992       .08564
 ia1journal47 |     .054753    .0105033      5.21    0.000       .034167     .0753391
 ia1journal48 |    -.073535    .0253225     -2.90    0.004     -.1231663    -.0239038
 ia1journal50 |      .14662    .0099642     14.71    0.000      .1270905     .1661495
 ia1journal51 |    .0925026     .019238      4.81    0.000      .0547969     .1302084
 ia1journal52 |    .0558041    .0161737      3.45    0.001      .0241043     .0875039
 ia1journal53 |    .1500611    .0197164      7.61    0.000      .1114175     .1887046
 ia1journal54 |    .0730917    .0140838      5.19    0.000      .0454879     .1006955
 ia1journal55 |    .0781904    .0175346      4.46    0.000      .0438233     .1125575
 ia1journal56 |     .023516    .0177451      1.33    0.185     -.0112638     .0582958
 ia1journal57 |   -.0337786    .0228797     -1.48    0.140      -.078622     .0110648
 ia1journal58 |     .127589    .0161206      7.91    0.000      .0959931     .1591849
 ia1journal59 |    .1186007    .0108768     10.90    0.000      .0972827     .1399188
 ia1journal60 |    .1649869    .0166709      9.90    0.000      .1323125     .1976613
 ia1journal61 |   -.0093671    .0225085     -0.42    0.677     -.0534831     .0347488
 ia1journal62 |    .1222303    .0136722      8.94    0.000      .0954333     .1490272
 ia1journal63 |    .0936392    .0079535     11.77    0.000      .0780506     .1092277
 ia1journal64 |     .112734    .0145312      7.76    0.000      .0842535     .1412146
 ia1journal65 |    .1432825     .013747     10.42    0.000      .1163388     .1702261
 ia1journal66 |     .080934    .0093928      8.62    0.000      .0625245     .0993436
 ia1journal67 |    .0541557    .0126176      4.29    0.000      .0294256     .0788858
 ia1journal68 |    .0512109    .0074488      6.88    0.000      .0366115     .0658103
 ia1journal69 |    .0909352    .0118098      7.70    0.000      .0677883      .114082
 ia1journal70 |    .1181009    .0133221      8.87    0.000      .0919901     .1442117
 ia1journal71 |    .1031623     .016622      6.21    0.000      .0705838     .1357408
 ia1journal72 |    .0851647      .01471      5.79    0.000      .0563336     .1139957
 ia1journal73 |     .075795    .0187272      4.05    0.000      .0390905     .1124996
 ia1journal74 |    .1235057    .0098135     12.59    0.000      .1042716     .1427397
 ia1journal75 |    .1785069    .0131318     13.59    0.000       .152769     .2042447
 ia1journal76 |    .1480463    .0080529     18.38    0.000      .1322628     .1638298
 ia1journal77 |     .112901    .0087795     12.86    0.000      .0956934     .1301085
 ia1journal78 |    .1044525    .0089966     11.61    0.000      .0868195     .1220855
 ia1journal79 |    .1297647    .0149273      8.69    0.000      .1005076     .1590217
 ia1journal80 |     .102359    .0109763      9.33    0.000      .0808458     .1238722
 ia1journal81 |    .1987128     .017298     11.49    0.000      .1648094     .2326162
 ia1journal82 |    .0266331    .0216838      1.23    0.219     -.0158664     .0691326
 ia1journal83 |    .0726504    .0132209      5.50    0.000      .0467379      .098563
 ia1journal84 |    .0331246    .0144444      2.29    0.022      .0048141      .061435
 ia1journal85 |   -15.56443    429.4861     -0.04    0.971     -857.3418     826.2129
 ia1journal86 |    .1758587    .0239405      7.35    0.000      .1289362     .2227812
 ia1journal87 |    .1440297    .0133653     10.78    0.000      .1178341     .1702252
 ia1journal88 |    .1117634     .017823      6.27    0.000       .076831     .1466958
 ia1journal89 |    .0629226     .020145      3.12    0.002      .0234391     .1024061
 ia1journal90 |    .0295403    .0103736      2.85    0.004      .0092083     .0498722
 ia1journal91 |   -.0004359    .0226973     -0.02    0.985     -.0449217       .04405
 ia1journal92 |     .099844    .0219479      4.55    0.000      .0568269     .1428612
 ia1journal93 |    .0302165    .0091257      3.31    0.001      .0123305     .0481025
 ia1journal94 |   -.0122811    .0231426     -0.53    0.596     -.0576398     .0330775
 ia1journal95 |    .0910757    .0367915      2.48    0.013      .0189658     .1631856
 ia1journal96 |     .090799    .0206228      4.40    0.000       .050379     .1312189
 ia1journal97 |    .0075856    .0257804      0.29    0.769     -.0429431     .0581143
 ia1journal98 |    .0177669     .018083      0.98    0.326     -.0176751     .0532088
 ia1journal99 |    .0583175    .0182732      3.19    0.001      .0225028     .0941322
ia1journal100 |    .0980129    .0195147      5.02    0.000      .0597648     .1362609
  ia2journal2 |   -.0023398    .0006029     -3.88    0.000     -.0035216    -.0011581
  ia2journal3 |   -.0024017    .0003263     -7.36    0.000     -.0030411    -.0017622
  ia2journal4 |   -.0044341    .0004128    -10.74    0.000     -.0052432     -.003625
  ia2journal5 |   -.0041569    .0004947     -8.40    0.000     -.0051265    -.0031873
  ia2journal6 |   -.0034091    .0003425     -9.95    0.000     -.0040803    -.0027378
  ia2journal7 |   -.0058571    .0008019     -7.30    0.000     -.0074288    -.0042854
  ia2journal8 |   -.0042053    .0007854     -5.35    0.000     -.0057447    -.0026659
  ia2journal9 |   -.0075357    .0010963     -6.87    0.000     -.0096845    -.0053869
 ia2journal10 |    .0016159    .0007786      2.08    0.038        .00009     .0031419
 ia2journal11 |    -.001337    .0005129     -2.61    0.009     -.0023422    -.0003318
 ia2journal12 |   -.0002112    .0009901     -0.21    0.831     -.0021518     .0017294
 ia2journal13 |   -.0045225    .0004929     -9.17    0.000     -.0054886    -.0035563
 ia2journal14 |   -.0021997    .0005448     -4.04    0.000     -.0032675    -.0011319
 ia2journal15 |   -.0016082     .000382     -4.21    0.000     -.0023569    -.0008594
 ia2journal16 |   -.0034116    .0007535     -4.53    0.000     -.0048885    -.0019348
 ia2journal17 |   -.0058178    .0006513     -8.93    0.000     -.0070943    -.0045414
 ia2journal18 |    .0042068    .0012561      3.35    0.001      .0017448     .0066687
 ia2journal19 |   -.0041534    .0010818     -3.84    0.000     -.0062737    -.0020331
 ia2journal20 |   -.0104509    .0013358     -7.82    0.000      -.013069    -.0078328
 ia2journal21 |   -.0044974    .0005089     -8.84    0.000     -.0054948    -.0034999
 ia2journal22 |   -.0056793     .000696     -8.16    0.000     -.0070434    -.0043151
 ia2journal23 |   -.0041395    .0007423     -5.58    0.000     -.0055943    -.0026846
 ia2journal24 |   -.0064239    .0010394     -6.18    0.000     -.0084611    -.0043867
 ia2journal25 |   -.0041981    .0003861    -10.87    0.000     -.0049548    -.0034415
 ia2journal26 |    -.003659    .0003828     -9.56    0.000     -.0044093    -.0029087
 ia2journal27 |   -.0070661    .0004333    -16.31    0.000     -.0079153    -.0062169
 ia2journal28 |   -.0027033    .0008181     -3.30    0.001     -.0043069    -.0010998
 ia2journal29 |   -.0020841    .0014692     -1.42    0.156     -.0049637     .0007956
 ia2journal30 |   -.0064443    .0008214     -7.85    0.000     -.0080543    -.0048344
 ia2journal31 |   -.0060397    .0008297     -7.28    0.000     -.0076658    -.0044135
 ia2journal32 |    -.004765    .0003521    -13.53    0.000     -.0054552    -.0040748
 ia2journal33 |   -.0061893    .0004092    -15.13    0.000     -.0069913    -.0053874
 ia2journal34 |   -.0077177    .0007231    -10.67    0.000     -.0091348    -.0063005
 ia2journal35 |   -.0024787     .000403     -6.15    0.000     -.0032686    -.0016888
 ia2journal36 |    -.007508     .000735    -10.22    0.000     -.0089486    -.0060675
 ia2journal37 |    -.007137    .0012378     -5.77    0.000     -.0095631    -.0047109
 ia2journal38 |   -.0066888    .0009304     -7.19    0.000     -.0085124    -.0048652
 ia2journal39 |   -.0072071    .0009406     -7.66    0.000     -.0090506    -.0053637
 ia2journal40 |    .0079427    .0022118      3.59    0.000      .0036076     .0122777
 ia2journal41 |   -.0086576    .0007871    -11.00    0.000     -.0102003     -.007115
 ia2journal42 |   -.0059005     .001422     -4.15    0.000     -.0086877    -.0031134
 ia2journal43 |   -.0060654    .0011019     -5.50    0.000     -.0082252    -.0039057
 ia2journal44 |   -.0062189    .0010603     -5.87    0.000      -.008297    -.0041408
 ia2journal45 |    -.004477    .0008688     -5.15    0.000     -.0061798    -.0027741
 ia2journal46 |   -.0048931    .0015055     -3.25    0.001     -.0078437    -.0019424
 ia2journal47 |   -.0045769     .000616     -7.43    0.000     -.0057842    -.0033697
 ia2journal48 |   -.0008654    .0015278     -0.57    0.571     -.0038599      .002129
 ia2journal50 |   -.0067588    .0005532    -12.22    0.000     -.0078431    -.0056745
 ia2journal51 |   -.0055548    .0011091     -5.01    0.000     -.0077286     -.003381
 ia2journal52 |   -.0049425    .0009455     -5.23    0.000     -.0067956    -.0030894
 ia2journal53 |   -.0080155    .0011549     -6.94    0.000     -.0102791    -.0057519
 ia2journal54 |   -.0029806    .0007938     -3.75    0.000     -.0045365    -.0014248
 ia2journal55 |   -.0049224    .0010029     -4.91    0.000     -.0068881    -.0029567
 ia2journal56 |   -.0019821    .0010212     -1.94    0.052     -.0039837     .0000195
 ia2journal57 |    -.001644    .0013978     -1.18    0.240     -.0043836     .0010956
 ia2journal58 |   -.0082883    .0009729     -8.52    0.000     -.0101953    -.0063814
 ia2journal59 |   -.0073173    .0006286    -11.64    0.000     -.0085494    -.0060853
 ia2journal60 |   -.0058254    .0009303     -6.26    0.000     -.0076486    -.0040021
 ia2journal61 |    -.006199    .0014513     -4.27    0.000     -.0090436    -.0033545
 ia2journal62 |   -.0075406    .0007716     -9.77    0.000      -.009053    -.0060282
 ia2journal63 |   -.0039208     .000433     -9.06    0.000     -.0047694    -.0030722
 ia2journal64 |   -.0060114    .0008312     -7.23    0.000     -.0076406    -.0043822
 ia2journal65 |   -.0074907     .000763     -9.82    0.000     -.0089862    -.0059953
 ia2journal66 |   -.0048823    .0005169     -9.45    0.000     -.0058954    -.0038692
 ia2journal67 |   -.0025697    .0007206     -3.57    0.000      -.003982    -.0011574
 ia2journal68 |   -.0022817    .0003979     -5.73    0.000     -.0030616    -.0015017
 ia2journal69 |   -.0045611    .0006455     -7.07    0.000     -.0058262    -.0032959
 ia2journal70 |   -.0081675    .0007699    -10.61    0.000     -.0096765    -.0066585
 ia2journal71 |    -.009193    .0010186     -9.02    0.000     -.0111895    -.0071966
 ia2journal72 |   -.0049589    .0008441     -5.87    0.000     -.0066133    -.0033045
 ia2journal73 |   -.0041734     .001181     -3.53    0.000     -.0064882    -.0018586
 ia2journal74 |    -.004351    .0005368     -8.11    0.000     -.0054031    -.0032989
 ia2journal75 |   -.0089467    .0007378    -12.13    0.000     -.0103929    -.0075006
 ia2journal76 |   -.0054525    .0004427    -12.32    0.000     -.0063202    -.0045848
 ia2journal77 |   -.0047142     .000479     -9.84    0.000      -.005653    -.0037754
 ia2journal78 |   -.0064237    .0005044    -12.73    0.000     -.0074123     -.005435
 ia2journal79 |    -.006925    .0008613     -8.04    0.000     -.0086132    -.0052369
 ia2journal80 |   -.0052128    .0006067     -8.59    0.000     -.0064019    -.0040236
 ia2journal81 |   -.0072124    .0009287     -7.77    0.000     -.0090327    -.0053922
 ia2journal82 |   -.0008729    .0014498     -0.60    0.547     -.0037144     .0019686
 ia2journal83 |   -.0032781     .000718     -4.57    0.000     -.0046854    -.0018708
 ia2journal84 |   -.0027763    .0008401     -3.30    0.001     -.0044228    -.0011297
 ia2journal85 |    .7662075    24.60269      0.03    0.975     -47.45418     48.98659
 ia2journal86 |   -.0108305    .0014187     -7.63    0.000     -.0136111      -.00805
 ia2journal87 |   -.0099906    .0007723    -12.94    0.000     -.0115042    -.0084769
 ia2journal88 |   -.0069773    .0010413     -6.70    0.000     -.0090183    -.0049363
 ia2journal89 |   -.0066252    .0012504     -5.30    0.000     -.0090759    -.0041746
 ia2journal90 |   -.0046682    .0006248     -7.47    0.000     -.0058927    -.0034436
 ia2journal91 |   -.0019159    .0013149     -1.46    0.145      -.004493     .0006613
 ia2journal92 |   -.0067299    .0012899     -5.22    0.000     -.0092581    -.0042018
 ia2journal93 |    -.003406     .000524     -6.50    0.000     -.0044331     -.002379
 ia2journal94 |   -.0013515    .0014339     -0.94    0.346     -.0041618     .0014588
 ia2journal95 |   -.0073142    .0022175     -3.30    0.001     -.0116604     -.002968
 ia2journal96 |   -.0049255    .0011868     -4.15    0.000     -.0072516    -.0025994
 ia2journal97 |   -.0043672    .0015183     -2.88    0.004     -.0073429    -.0013914
 ia2journal98 |   -.0048362    .0010984     -4.40    0.000     -.0069891    -.0026834
 ia2journal99 |    -.002118    .0010017     -2.11    0.034     -.0040813    -.0001547
ia2journal100 |   -.0066652    .0011456     -5.82    0.000     -.0089105    -.0044198
        d1c95 |   -.0274247    .0073504     -3.73    0.000     -.0418313    -.0130182
        d1c00 |    .0101697    .0095355      1.07    0.286     -.0085196      .028859
        d2c95 |   -.0035329     .005605     -0.63    0.528     -.0145186     .0074528
        d2c00 |    .0067271    .0075192      0.89    0.371     -.0080103     .0214644
--------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
--------------+----------------------------------------------------------------
           cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
--------------+----------------------------------------------------------------
cit           |
      cit_lag |     1.00132     .000253      5.22    0.000      1.000824     1.001816
      ip86c87 |    .7078518     .041409     -5.91    0.000      .6311716     .7938477
      ip86c88 |    1.091846    .0446311      2.15    0.032      1.007783     1.182921
      ip86c89 |    1.090826    .0452615      2.10    0.036      1.005626     1.183244
      ip86c90 |     1.10757    .0468364      2.42    0.016      1.019474      1.20328
      ip86c91 |     1.04126    .0464275      0.91    0.365      .9541263      1.13635
      ip86c92 |    1.010927    .0376698      0.29    0.771      .9397267     1.087521
      ip86c93 |    .9707401    .0481404     -0.60    0.549      .8808271     1.069831
      ip86c94 |     .923892    .0392428     -1.86    0.062      .8500921     1.004099
      ip86c95 |    .9119625    .0471489     -1.78    0.075      .8240802     1.009217
      ip86c96 |    .9760938    .0480192     -0.49    0.623      .8863729     1.074896
      ip86c97 |    .8605637    .0441245     -2.93    0.003      .7782849      .951541
      ip86c98 |    .8762714     .040943     -2.83    0.005      .7995893     .9603074
      ip86c99 |    .8657035    .0428607     -2.91    0.004      .7856452     .9539199
      ip87c88 |    .8015126    .0398792     -4.45    0.000      .7270409     .8836125
      ip87c89 |    1.179638     .040118      4.86    0.000      1.103572     1.260948
      ip87c90 |    1.251087    .0376592      7.44    0.000      1.179412     1.327119
      ip87c91 |    1.226974    .0516098      4.86    0.000      1.129878     1.332414
      ip87c92 |    1.172886    .0425039      4.40    0.000      1.092469     1.259222
      ip87c93 |     1.14368    .0547876      2.80    0.005      1.041185     1.256264
      ip87c94 |    1.024255    .0495128      0.50    0.620       .931667     1.126044
      ip87c95 |    1.045581    .0483604      0.96    0.335      .9549657     1.144795
      ip87c96 |    1.055309    .0581084      0.98    0.328      .9473488     1.175572
      ip87c97 |    .9341392    .0547419     -1.16    0.245      .8327795     1.047836
      ip87c98 |    .9388337    .0508473     -1.17    0.244      .8442819     1.043974
      ip87c99 |     .937769    .0445344     -1.35    0.176      .8544223     1.029246
      ip88c89 |    .6876166    .0396271     -6.50    0.000      .6141747     .7698406
      ip88c90 |    1.130656    .0465445      2.98    0.003      1.043014     1.225663
      ip88c91 |    1.108962    .0426151      2.69    0.007      1.028506     1.195712
      ip88c92 |    1.169527    .0459723      3.98    0.000      1.082806     1.263192
      ip88c93 |    1.133578    .0384421      3.70    0.000      1.060682     1.211483
      ip88c94 |    1.059854    .0367969      1.67    0.094      .9901329     1.134485
      ip88c95 |    1.094873    .0402271      2.47    0.014      1.018801     1.176625
      ip88c96 |    1.068796    .0493962      1.44    0.150      .9762369     1.170131
      ip88c97 |    .9740934    .0365714     -0.70    0.484      .9049885     1.048475
      ip88c98 |    .9989831    .0445584     -0.02    0.982      .9153587     1.090247
      ip88c99 |    .9333434       .0439     -1.47    0.142      .8511479     1.023477
      ip89c90 |    .7090751    .0487064     -5.00    0.000      .6197594     .8112624
      ip89c91 |    1.054757    .0622242      0.90    0.366      .9395864     1.184045
      ip89c92 |    1.135161    .0514418      2.80    0.005      1.038685     1.240598
      ip89c93 |    1.143885    .0458909      3.35    0.001      1.057386      1.23746
      ip89c94 |    1.091469    .0402477      2.37    0.018      1.015368     1.173274
      ip89c95 |    1.089569    .0426143      2.19    0.028      1.009167     1.176376
      ip89c96 |    1.089863    .0386551      2.43    0.015      1.016674     1.168321
      ip89c97 |    .9521556    .0364106     -1.28    0.200      .8834009     1.026261
      ip89c98 |    .9675896    .0328392     -0.97    0.332        .90532     1.034142
      ip89c99 |    .9654849    .0370918     -0.91    0.361      .8954558     1.040991
      ip90c91 |    .6940106    .0435591     -5.82    0.000      .6136786     .7848582
      ip90c92 |    1.100503     .056027      1.88    0.060      .9959927     1.215979
      ip90c93 |    1.192141    .0540645      3.88    0.000      1.090749     1.302957
      ip90c94 |    1.209131     .041795      5.49    0.000      1.129928     1.293887
      ip90c95 |     1.17714    .0349544      5.49    0.000      1.110586     1.247683
      ip90c96 |    1.216669    .0382161      6.24    0.000      1.144026     1.293925
      ip90c97 |    1.054887    .0343642      1.64    0.101       .989639     1.124436
      ip90c98 |    1.056462    .0299165      1.94    0.052      .9994238     1.116754
      ip90c99 |    1.024939    .0333219      0.76    0.449      .9616668     1.092375
      ip91c92 |    .7208334    .0490699     -4.81    0.000      .6307981     .8237196
      ip91c93 |     1.14023    .0638267      2.34    0.019      1.021751     1.272449
      ip91c94 |    1.185914    .0487539      4.15    0.000      1.094107     1.285425
      ip91c95 |    1.199877    .0429236      5.09    0.000       1.11863     1.287025
      ip91c96 |    1.227179    .0435566      5.77    0.000      1.144711     1.315587
      ip91c97 |    1.091782     .033985      2.82    0.005      1.027164     1.160465
      ip91c98 |    1.115995    .0361294      3.39    0.001      1.047382     1.189102
      ip91c99 |    1.075148     .031105      2.50    0.012      1.015879     1.137874
      ip92c93 |    .7421633    .0499215     -4.43    0.000      .6504944     .8467503
      ip92c94 |      1.0761    .0561416      1.41    0.160      .9715037     1.191958
      ip92c95 |     1.26287    .0461234      6.39    0.000      1.175629     1.356584
      ip92c96 |     1.29274    .0535311      6.20    0.000      1.191966     1.402034
      ip92c97 |    1.183818    .0316243      6.32    0.000       1.12343     1.247451
      ip92c98 |    1.183215    .0336838      5.91    0.000      1.119004     1.251111
      ip92c99 |    1.119631    .0280959      4.50    0.000      1.065897     1.176075
      ip93c94 |    .6628756    .0434343     -6.28    0.000      .5829856     .7537134
      ip93c95 |    1.094141    .0638337      1.54    0.123      .9759169     1.226686
      ip93c96 |    1.294572    .0609441      5.48    0.000      1.180468     1.419704
      ip93c97 |    1.189838    .0528437      3.91    0.000      1.090646     1.298051
      ip93c98 |    1.216945     .034362      6.95    0.000      1.151426     1.286192
      ip93c99 |    1.176126    .0329132      5.80    0.000      1.113354     1.242436
      ip94c95 |    .6633311    .0449332     -6.06    0.000      .5808594     .7575123
      ip94c96 |    1.116007    .0541611      2.26    0.024      1.014746     1.227374
      ip94c97 |    1.161481    .0473973      3.67    0.000      1.072202     1.258194
      ip94c98 |    1.227422    .0435118      5.78    0.000      1.145036     1.315736
      ip94c99 |    1.182142    .0282472      7.00    0.000      1.128055     1.238823
      ip95c96 |    .6232833    .0462886     -6.37    0.000       .538853     .7209425
      ip95c97 |    .9794345    .0519854     -0.39    0.695      .8826657     1.086812
      ip95c98 |    1.112124     .051097      2.31    0.021      1.016353      1.21692
      ip95c99 |    1.121033    .0419801      3.05    0.002        1.0417     1.206407
      ip86c00 |    .8953785    .0346943     -2.85    0.004      .8298968     .9660268
      ip86c01 |    .8874247    .0311834     -3.40    0.001      .8283634     .9506969
      ip86c02 |    .9188694     .027352     -2.84    0.004      .8667944     .9740729
      ip86c03 |    .9865979    .0271551     -0.49    0.624       .934785     1.041283
      ip86c04 |    1.015815     .034352      0.46    0.643      .9506687     1.085425
      ip87c00 |    .9181136    .0414659     -1.89    0.059      .8403352     1.003091
      ip87c01 |    .9336277    .0396272     -1.62    0.106      .8591026     1.014618
      ip87c02 |    .9459182    .0326735     -1.61    0.107       .883999     1.012175
      ip87c03 |    .9589224    .0278789     -1.44    0.149      .9058083     1.015151
      ip87c04 |    1.060944    .0306098      2.05    0.040      1.002615     1.122667
      ip88c00 |     .940339    .0346991     -1.67    0.096       .874731     1.010868
      ip88c01 |    .9431292    .0335997     -1.64    0.100      .8795216     1.011337
      ip88c02 |    .9688828    .0332295     -0.92    0.357      .9058949      1.03625
      ip88c03 |    1.001009    .0305102      0.03    0.974      .9429612      1.06263
      ip88c04 |    1.017525    .0288176      0.61    0.540       .962583     1.075604
      ip89c00 |    .9353057    .0307345     -2.04    0.042       .876966     .9975265
      ip89c01 |    .9432536    .0296727     -1.86    0.063      .8868528     1.003241
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 ia2journal89 |    .9933967    .0006293    -10.46    0.000       .992164     .9946309
 ia2journal90 |    .9953427    .0004376    -10.62    0.000      .9944854     .9962007
 ia2journal91 |     .998086    .0006446     -2.97    0.003      .9968235     .9993501
 ia2journal92 |    .9932927    .0006569    -10.18    0.000       .992006      .994581
 ia2journal93 |    .9965998    .0004469     -7.60    0.000      .9957242     .9974761
 ia2journal94 |    .9986494    .0006949     -1.94    0.052      .9972883     1.000012
 ia2journal95 |    .9927125    .0006434    -11.28    0.000      .9914522     .9939744
 ia2journal96 |    .9950866    .0006469     -7.58    0.000      .9938195     .9963554
 ia2journal97 |    .9956424    .0006672     -6.52    0.000      .9943355     .9969509
 ia2journal98 |    .9951754    .0006245     -7.71    0.000      .9939522     .9964002
 ia2journal99 |    .9978842    .0006538     -3.23    0.001      .9966037     .9991664
ia2journal100 |     .993357    .0006078    -10.89    0.000      .9921664      .994549
        d1c95 |    .9729479    .0174924     -1.53    0.127      .9392605     1.007844
        d1c00 |    1.010222    .0168454      0.61    0.542      .9777388     1.043783
        d2c95 |    .9964733    .0173704     -0.20    0.839      .9630031     1.031107
        d2c00 |     1.00675    .0151688      0.45    0.655      .9774541     1.036923
--------------+----------------------------------------------------------------
Wald chi2(336) = -1.7e+17                                Prob > chi2 =   1.0000

. **********************************************************************;
. *** 1996-2005                                                      ***;
. **********************************************************************;
. clear;

. use temp_data;

. gen plower = 1996;

. gen pupper = 2005;

. keep if pyear >= plower & pyear <= pupper;
(54,953 observations deleted)

. * Create fixed effects for publication x citation year interactions;
. * Drop the 2005 cyear to avoid multicolinearity with the constant;
. * Don't create variables with pyear after cyear;
. * Do create variables with pyear = cyear since keeping age0 = 1 observations;
. forvalues y = 56/99 {;
  2.    forvalues x = 80/99 {;
  3.       quietly gen ip`y'c`x' = py19`y' * c`x' if
>          (`x' >= `y')
>        & (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 56/99 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip`y'c0`x' = py19`y' * c0`x' if
>          (1900 + `y' >= plower)
>        & (1900 + `y' <= pupper);
  4.    };
  5. };

. forvalues y = 0/5 {;
  2.    forvalues x = 0/4 {;
  3.       quietly gen ip0`y'c0`x' = py200`y' * c0`x' if
>          (`x' >= `y')
>        & (2000 + `y' >= plower)
>        & (2000 + `y' <= pupper);
  4.    };
  5. };

. foreach var of varlist ip* {;
  2.    capture assert !missing(`var');
  3.    if _rc {;
  4.       drop `var';
  5.    };
  6. };

. egen title = group(journal);

. rename journal smournal;

. quietly tabulate title, generate(journal);

. drop title;

. foreach var of varlist journal* {;
  2.    quietly gen ia1`var' = age * `var';
  3.    quietly gen ia2`var' = age2 * `var';
  4.    quietly gen ia3`var' = age3 * `var';
  5.    quietly gen ia4`var' = age4 * `var';
  6. };

. rename smournal journal;

. * Avoid multicolinearity by dropping first journal's age profile;
.  drop ia1journal1 ia2journal1 ia3journal1 ia4journal1;

.  * Column 1: No fixed effects or journal age profile;
. poisson cit  ip* d1c* d2c*, irr cluster(journal);

Iteration 0:   log pseudolikelihood = -158025.23
Iteration 1:   log pseudolikelihood = -157399.13
Iteration 2:   log pseudolikelihood = -157395.81
Iteration 3:   log pseudolikelihood = -157395.81

Poisson regression                              Number of obs     =      5,500
                                                Wald chi2(49)     =    8290.21
Log pseudolikelihood = -157395.81               Prob > chi2       =     0.0000

(Std. Err. adjusted for 100 clusters in journal)
-------------+----------------------------------------------------------------
             |               Robust
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip96c96 |    .2196739    .0370425     -8.99    0.000      .1578501     .3057118
     ip96c97 |    .9890151     .131663     -0.08    0.934      .7618797     1.283865
     ip96c98 |    1.766238    .2330069      4.31    0.000      1.363818     2.287399
     ip96c99 |    2.234694    .3126431      5.75    0.000      1.698757     2.939712
     ip97c97 |    .2152494    .0346856     -9.53    0.000       .156956     .2951929
     ip97c98 |    .9531327    .1301413     -0.35    0.725      .7293395     1.245595
     ip97c99 |    1.727512    .2417165      3.91    0.000      1.313165     2.272598
     ip98c98 |    .2045042    .0357138     -9.09    0.000      .1452284     .2879737
     ip98c99 |     .993502    .1564189     -0.04    0.967      .7297161     1.352644
     ip99c99 |    .2178185    .0369428     -8.99    0.000      .1562168     .3037118
     ip96c00 |    1.233913    .0637809      4.07    0.000      1.115029     1.365473
     ip96c01 |    1.340395    .0650059      6.04    0.000      1.218854     1.474056
     ip96c02 |    1.222735    .0501481      4.90    0.000      1.128293     1.325082
     ip96c03 |    1.288253    .0532473      6.13    0.000      1.188006      1.39696
     ip96c04 |    1.287367    .0506736      6.42    0.000      1.191783     1.390617
     ip97c00 |    1.023082    .0393256      0.59    0.553      .9488372     1.103137
     ip97c01 |    1.125188    .0439199      3.02    0.003      1.042317     1.214648
     ip97c02 |    1.147605    .0383831      4.12    0.000      1.074788     1.225355
     ip97c03 |    1.248759    .0438439      6.33    0.000      1.165716     1.337717
     ip97c04 |     1.25405      .04398      6.45    0.000      1.170747     1.343281
     ip98c00 |    .8131529    .0422232     -3.98    0.000      .7344687     .9002666
     ip98c01 |    1.045467    .0481224      0.97    0.334      .9552779      1.14417
     ip98c02 |    1.115815    .0417505      2.93    0.003      1.036914     1.200719
     ip98c03 |    1.220792    .0495789      4.91    0.000      1.127386     1.321937
     ip98c04 |    1.257737    .0449052      6.42    0.000      1.172733     1.348902
     ip99c00 |    .4463975    .0213915    -16.83    0.000      .4063796     .4903561
     ip99c01 |      .84222     .033583     -4.31    0.000      .7789048     .9106819
     ip99c02 |    1.028488    .0323133      0.89    0.371       .967066     1.093812
     ip99c03 |    1.144362    .0357937      4.31    0.000      1.076315     1.216712
     ip99c04 |    1.224178    .0410077      6.04    0.000      1.146386     1.307248
     ip00c00 |    .3007579    .0459413     -7.87    0.000      .2229434     .4057323
     ip00c01 |    .4860428     .025404    -13.80    0.000      .4387173     .5384734
     ip00c02 |    .8290787    .0314129     -4.95    0.000      .7697411     .8929906
     ip00c03 |    1.082127    .0318811      2.68    0.007      1.021411     1.146452
     ip00c04 |    1.182217    .0373726      5.30    0.000      1.111191     1.257782
     ip01c01 |    .2943875    .0466052     -7.72    0.000      .2158557     .4014904
     ip01c02 |    .4724137    .0234547    -15.10    0.000      .4286091     .5206951
     ip01c03 |    .8422264    .0348481     -4.15    0.000      .7766215     .9133732
     ip01c04 |    1.063944    .0380688      1.73    0.083       .991887     1.141236
     ip02c02 |    .3353009    .0591102     -6.20    0.000      .2373429     .4736887
     ip02c03 |    .5031609    .0246725    -14.01    0.000      .4570548      .553918
     ip02c04 |    .8435365    .0279601     -5.13    0.000      .7904779     .9001564
     ip03c03 |    .3538297    .0591696     -6.21    0.000      .2549477     .4910633
     ip03c04 |    .4993612    .0235003    -14.76    0.000      .4553619      .547612
     ip04c04 |    .3319009    .0487314     -7.51    0.000      .2489034     .4425742
       d1c95 |    1.399938    .1987198      2.37    0.018      1.059941     1.848996
       d1c00 |    1.012914    .1642257      0.08    0.937      .7371665     1.391809
       d2c95 |    1.281451    .2247795      1.41    0.157      .9086414     1.807221
       d2c00 |    2.943691     .477986      6.65    0.000      2.141299     4.046759
       _cons |     27.1917    4.328982     20.75    0.000      19.90321     37.14921
-------------+----------------------------------------------------------------

.   * Column 2: Journal fixed effects, no age profile;
. xtpqml cit ip* d1c* d2c*, i(journal) irr fe cluster(journal);
note: 2 groups (110 obs) dropped because of all zero outcomes

Iteration 0:   log likelihood = -87472.032
Iteration 1:   log likelihood = -38035.178
Iteration 2:   log likelihood =  -33976.82
Iteration 3:   log likelihood = -33873.688
Iteration 4:   log likelihood = -33873.568
Iteration 5:   log likelihood = -33873.568

Conditional fixed-effects Poisson regression    Number of obs     =      5,390
Group variable: journal                         Number of groups  =         98

                                                Obs per group:
                                                              min =         55
                                                              avg =       55.0
                                                              max =         55

                                                Wald chi2(49)     =   62921.55
Log likelihood  = -33873.568                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip96c96 |   -2.170366    .0413297    -52.51    0.000     -2.251371    -2.089362
     ip96c97 |   -.7111496    .0246022    -28.91    0.000      -.759369    -.6629301
     ip96c98 |   -.0198788    .0233093     -0.85    0.394     -.0655642     .0258065
     ip96c99 |    .1882371    .0228909      8.22    0.000      .1433717     .2331025
     ip97c97 |   -2.189406    .0415606    -52.68    0.000     -2.270864    -2.107949
     ip97c98 |   -.6255357    .0259432    -24.11    0.000     -.6763835     -.574688
     ip97c99 |   -.0506083    .0240684     -2.10    0.035     -.0977814    -.0034351
     ip98c98 |   -2.102258    .0423653    -49.62    0.000     -2.185292    -2.019224
     ip98c99 |    -.605928    .0261781    -23.15    0.000     -.6572362    -.5546198
     ip99c99 |   -2.012404    .0415893    -48.39    0.000     -2.093918    -1.930891
     ip96c00 |    .0825303    .0116885      7.06    0.000      .0596212     .1054393
     ip96c01 |    .2018793    .0111711     18.07    0.000      .1799844     .2237743
     ip96c02 |     .142689    .0112212     12.72    0.000      .1206958     .1646822
     ip96c03 |    .2037086    .0109258     18.64    0.000      .1822944     .2251229
     ip96c04 |    .2183875    .0108558     20.12    0.000      .1971105     .2396646
     ip97c00 |   -.0557146    .0123074     -4.53    0.000     -.0798367    -.0315926
     ip97c01 |    .0583152    .0117175      4.98    0.000      .0353493      .081281
     ip97c02 |    .1021575    .0113959      8.96    0.000      .0798221      .124493
     ip97c03 |    .1953202     .010939     17.86    0.000      .1738801     .2167602
     ip97c04 |    .2029502     .010915     18.59    0.000      .1815572     .2243432
     ip98c00 |   -.2299846    .0135907    -16.92    0.000     -.2566218    -.2033473
     ip98c01 |   -.0040893     .011997     -0.34    0.733     -.0276029     .0194243
     ip98c02 |    .0885954    .0114627      7.73    0.000       .066129     .1110618
     ip98c03 |    .1848061    .0109795     16.83    0.000      .1632868     .2063254
     ip98c04 |    .2307224    .0107406     21.48    0.000      .2096712     .2517737
     ip99c00 |    -.843083      .01819    -46.35    0.000     -.8787347    -.8074313
     ip99c01 |   -.1693827    .0131802    -12.85    0.000     -.1952155    -.1435499
     ip99c02 |    .0193675    .0118154      1.64    0.101     -.0037903     .0425252
     ip99c03 |     .130001    .0112318     11.57    0.000      .1079871     .1520149
     ip99c04 |    .1974228    .0109015     18.11    0.000      .1760562     .2187893
     ip00c00 |   -1.459937    .0366272    -39.86    0.000     -1.531725    -1.388149
     ip00c01 |   -.7493306    .0173939    -43.08    0.000     -.7834221    -.7152392
     ip00c02 |   -.1913725    .0129922    -14.73    0.000     -.2168369    -.1659082
     ip00c03 |     .074996    .0115154      6.51    0.000      .0524261     .0975658
     ip00c04 |    .1634589    .0110709     14.76    0.000      .1417602     .1851576
     ip01c01 |   -1.456038    .0370729    -39.27    0.000       -1.5287    -1.383377
     ip01c02 |   -.7418342    .0171698    -43.21    0.000     -.7754864     -.708182
     ip01c03 |   -.1574868     .012781    -12.32    0.000     -.1825371    -.1324365
     ip01c04 |    .0762027    .0114994      6.63    0.000      .0536642     .0987411
     ip02c02 |   -1.231776    .0351212    -35.07    0.000     -1.300613     -1.16294
     ip02c03 |   -.6664954    .0164996    -40.39    0.000     -.6988341    -.6341568
     ip02c04 |   -.1497348    .0127338    -11.76    0.000     -.1746925    -.1247771
     ip03c03 |   -1.177989    .0343199    -34.32    0.000     -1.245254    -1.110723
     ip03c04 |   -.6646811    .0165051    -40.27    0.000     -.6970306    -.6323317
     ip04c04 |   -1.221374    .0350106    -34.89    0.000     -1.289993    -1.152754
       d1c95 |   -.1249994    .0192132     -6.51    0.000     -.1626566    -.0873422
       d1c00 |   -.7558059    .0196203    -38.52    0.000     -.7942611    -.7173508
       d2c95 |   -.0759253     .016628     -4.57    0.000     -.1085156     -.043335
       d2c00 |    .1671246     .015241     10.97    0.000      .1372527     .1969965
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     ip96c96 |    .1141358    .0136321    -18.17    0.000      .0903142     .1442406
     ip96c97 |    .4910793    .0320473    -10.90    0.000      .4321188     .5580848
     ip96c98 |    .9803174    .0668827     -0.29    0.771      .8576164     1.120574
     ip96c99 |     1.20712    .0798182      2.85    0.004      1.060392      1.37415
     ip97c97 |    .1119832    .0123897    -19.79    0.000      .0901522     .1391007
     ip97c98 |    .5349747    .0391005     -8.56    0.000      .4635752     .6173711
     ip97c99 |     .950651    .0695213     -0.69    0.489      .8237066     1.097159
     ip98c98 |    .1221802    .0151504    -16.95    0.000      .0958189     .1557939
     ip98c99 |    .5455679    .0436404     -7.57    0.000      .4664021     .6381711
     ip99c99 |    .1336669    .0154137    -17.45    0.000      .1066273     .1675636
     ip96c00 |    1.086032    .0422155      2.12    0.034      1.006364     1.172006
     ip96c01 |      1.2237    .0501542      4.93    0.000      1.129245     1.326057
     ip96c02 |    1.153371    .0393845      4.18    0.000      1.078705     1.233205
     ip96c03 |    1.225941    .0444647      5.62    0.000      1.141817     1.316262
     ip96c04 |    1.244069     .044105      6.16    0.000       1.16056     1.333587
     ip97c00 |     .945809    .0289253     -1.82    0.068      .8907821     1.004235
     ip97c01 |    1.060049    .0351297      1.76    0.078      .9933846     1.131187
     ip97c02 |    1.107558     .032034      3.53    0.000      1.046519     1.172157
     ip97c03 |      1.2157    .0388753      6.11    0.000      1.141845     1.294333
     ip97c04 |    1.225011    .0389313      6.39    0.000      1.151035     1.303742
     ip98c00 |    .7945459    .0471738     -3.87    0.000      .7072638     .8925992
     ip98c01 |     .995919    .0420315     -0.10    0.923      .9168539     1.081802
     ip98c02 |    1.092638    .0383007      2.53    0.011      1.020091     1.170345
     ip98c03 |    1.202985      .04679      4.75    0.000      1.114687     1.298278
     ip98c04 |     1.25951     .044692      6.50    0.000      1.174891     1.350222
     ip99c00 |    .4303816    .0172945    -20.98    0.000      .3977854     .4656489
     ip99c01 |    .8441858    .0442629     -3.23    0.001       .761741     .9355538
     ip99c02 |    1.019556    .0310047      0.64    0.524      .9605637     1.082172
     ip99c03 |     1.13883    .0342937      4.32    0.000       1.07356     1.208067
     ip99c04 |    1.218259    .0395648      6.08    0.000       1.14313     1.298326
     ip00c00 |     .232251    .0331807    -10.22    0.000      .1755294     .3073018
     ip00c01 |    .4726829    .0246131    -14.39    0.000      .4268222     .5234711
     ip00c02 |    .8258249    .0303268     -5.21    0.000      .7684741     .8874558
     ip00c03 |     1.07788    .0296513      2.73    0.006      1.021303     1.137591
     ip00c04 |    1.177577    .0350772      5.49    0.000      1.110795     1.248374
     ip01c01 |    .2331582    .0365489     -9.29    0.000      .1714825     .3170163
     ip01c02 |    .4762396    .0242934    -14.54    0.000      .4309283     .5263153
     ip01c03 |    .8542881    .0343873     -3.91    0.000      .7894803     .9244158
     ip01c04 |    1.079181    .0374231      2.20    0.028       1.00827     1.155079
     ip02c02 |    .2917739    .0459537     -7.82    0.000      .2142813     .3972909
     ip02c03 |     .513505    .0263104    -13.01    0.000      .4644423     .5677506
     ip02c04 |    .8609363    .0283091     -4.55    0.000      .8072017      .918248
     ip03c03 |    .3078974    .0416061     -8.72    0.000      .2362563     .4012627
     ip03c04 |    .5144376    .0218989    -15.61    0.000      .4732582     .5592001
     ip04c04 |    .2948249    .0350692    -10.27    0.000      .2335148     .3722322
       d1c95 |    .8824974    .0575518     -1.92    0.055      .7766093     1.002823
       d1c00 |     .469632    .0539428     -6.58    0.000      .3749619     .5882042
       d2c95 |    .9268855    .0607622     -1.16    0.247      .8151272     1.053966
       d2c00 |    1.181902    .0774746      2.55    0.011      1.039404     1.343935
-------------+----------------------------------------------------------------
Wald chi2(49) =  8213.07                                Prob > chi2 =   0.0000

.  * Column 3: Volume fixed effects, no age profile;
. xtpqml cit ip* d1c* d2c*, i(volume) irr fe cluster(journal);
warning: existing panel variable is not volume
note: 100 groups (100 obs) dropped because of only one obs per group
note: 18 groups (108 obs) dropped because of all zero outcomes

Iteration 0:   log likelihood = -63847.455
Iteration 1:   log likelihood = -20336.995
Iteration 2:   log likelihood = -16840.868
Iteration 3:   log likelihood = -16688.146
Iteration 4:   log likelihood = -16687.446
Iteration 5:   log likelihood = -16687.446

Conditional fixed-effects Poisson regression    Number of obs     =      5,292
Group variable: volume                          Number of groups  =        882

                                                Obs per group:
                                                              min =          2
                                                              avg =        6.0
                                                              max =         10

                                                Wald chi2(49)     =   54953.90
Log likelihood  = -16687.446                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     ip96c96 |   -2.440067    .0435488    -56.03    0.000     -2.525422    -2.354713
     ip96c97 |    -.965786    .0280551    -34.42    0.000     -1.020773     -.910799
     ip96c98 |   -.2534659     .026675     -9.50    0.000     -.3057481    -.2011838
     ip96c99 |   -.0363045    .0263426     -1.38    0.168     -.0879351      .015326
     ip97c97 |   -2.471189    .0439167    -56.27    0.000     -2.557264    -2.385114
     ip97c98 |   -.8739236    .0292239    -29.90    0.000     -.9312014    -.8166458
     ip97c99 |   -.2863273    .0275322    -10.40    0.000     -.3402893    -.2323652
     ip98c98 |   -2.390234    .0445291    -53.68    0.000      -2.47751    -2.302959
     ip98c99 |    -.863795    .0293933    -29.39    0.000     -.9214048    -.8061853
     ip99c99 |   -2.324449    .0437541    -53.13    0.000     -2.410205    -2.238692
     ip96c00 |   -.0672029    .0153812     -4.37    0.000     -.0973495    -.0370564
     ip96c01 |    .0185772    .0150201      1.24    0.216     -.0108617     .0480161
     ip96c02 |    .0062176     .014978      0.42    0.678     -.0231388     .0355739
     ip96c03 |    .0658394    .0147589      4.46    0.000      .0369125     .0947663
     ip96c04 |    .0794866    .0147091      5.40    0.000      .0506573      .108316
     ip97c00 |   -.2107542    .0157485    -13.38    0.000     -.2416207    -.1798876
     ip97c01 |   -.1073741    .0152999     -7.02    0.000     -.1373613    -.0773869
     ip97c02 |   -.0456602    .0150449     -3.03    0.002     -.0751476    -.0161727
     ip97c03 |    .0459133    .0147039      3.12    0.002      .0170942     .0747323
     ip97c04 |    .0504057    .0146885      3.43    0.001      .0216168     .0791946
     ip98c00 |   -.4466293    .0168171    -26.56    0.000     -.4795903    -.4136684
     ip98c01 |   -.1765944    .0154567    -11.43    0.000      -.206889    -.1462998
     ip98c02 |   -.0766363    .0150393     -5.10    0.000     -.1061128    -.0471598
     ip98c03 |    .0202631    .0146736      1.38    0.167     -.0084966     .0490229
     ip98c04 |      .07025    .0144934      4.85    0.000      .0418435     .0986566
     ip99c00 |   -1.089394    .0206417    -52.78    0.000     -1.129851    -1.048937
     ip99c01 |    -.410337    .0163693    -25.07    0.000     -.4424202    -.3782537
     ip99c02 |   -.1716857    .0152121    -11.29    0.000     -.2015009    -.1418705
     ip99c03 |   -.0583151    .0147623     -3.95    0.000     -.0872487    -.0293816
     ip99c04 |    .0091066    .0145126      0.63    0.530     -.0193375     .0375508
     ip00c00 |   -2.361856    .0398402    -59.28    0.000     -2.439941    -2.283771
     ip00c01 |   -.9539887    .0200942    -47.48    0.000     -.9933726    -.9146049
     ip00c02 |    -.338707    .0162836    -20.80    0.000     -.3706222    -.3067918
     ip00c03 |   -.0723385    .0151315     -4.78    0.000     -.1019957    -.0426813
     ip00c04 |    .0161244     .014796      1.09    0.276     -.0128753     .0451241
     ip01c01 |   -2.364227    .0403393    -58.61    0.000      -2.44329    -2.285163
     ip01c02 |   -.9144347    .0198897    -45.98    0.000     -.9534177    -.8754516
     ip01c03 |   -.2850655    .0161742    -17.62    0.000     -.3167664    -.2533647
     ip01c04 |    -.051376    .0151818     -3.38    0.001     -.0811318    -.0216202
     ip02c02 |   -2.109069    .0387822    -54.38    0.000     -2.185081    -2.033057
     ip02c03 |   -.7292907    .0195942    -37.22    0.000     -.7676946    -.6908867
     ip02c04 |   -.1745903     .016507    -10.58    0.000     -.2069435    -.1422371
     ip03c03 |   -1.826624    .0384167    -47.55    0.000     -1.901919    -1.751328
     ip03c04 |   -.5023869    .0203774    -24.65    0.000     -.5423258    -.4624479
     ip04c04 |   -1.263868    .0406317    -31.11    0.000     -1.343505    -1.184232
       d1c95 |   -.1668468    .0202593     -8.24    0.000     -.2065542    -.1271393
       d1c00 |   -.0331551    .0233917     -1.42    0.156      -.079002     .0126918
       d2c95 |   -.1542498    .0182378     -8.46    0.000     -.1899953    -.1185043
       d2c00 |    .0038844     .019422      0.20    0.841     -.0341821     .0419508
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     ip96c96 |     .087155    .0112416    -18.92    0.000      .0676863     .1122235
     ip96c97 |    .3806839    .0248226    -14.81    0.000       .335013     .4325809
     ip96c98 |    .7761062    .0467728     -4.21    0.000      .6896403      .873413
     ip96c99 |    .9643466    .0525949     -0.67    0.506      .8665809     1.073142
     ip97c97 |    .0844843    .0089915    -23.22    0.000       .068578     .1040801
     ip97c98 |     .417311    .0245103    -14.88    0.000      .3719336     .4682246
     ip97c99 |    .7510168    .0438857     -4.90    0.000      .6697452     .8421504
     ip98c98 |    .0916082    .0117462    -18.64    0.000      .0712511     .1177817
     ip98c99 |    .4215592    .0267634    -13.61    0.000      .3722362     .4774178
     ip99c99 |    .0978374    .0121041    -18.79    0.000       .076771     .1246845
     ip96c00 |    .9350055    .0284818     -2.21    0.027       .880816     .9925288
     ip96c01 |    1.018751    .0275775      0.69    0.493      .9661087     1.074261
     ip96c02 |    1.006237    .0238886      0.26    0.793      .9604888     1.054164
     ip96c03 |    1.068055    .0214695      3.28    0.001      1.026794     1.110975
     ip96c04 |    1.082731    .0214905      4.00    0.000      1.041419     1.125682
     ip97c00 |    .8099732    .0239989     -7.11    0.000       .764276     .8584027
     ip97c01 |    .8981896    .0215224     -4.48    0.000      .8569817     .9413789
     ip97c02 |    .9553666    .0180916     -2.41    0.016      .9205577     .9914917
     ip97c03 |    1.046984     .018713      2.57    0.010      1.010942      1.08431
     ip97c04 |    1.051698    .0186921      2.84    0.005      1.015693     1.088979
     ip98c00 |     .639781    .0224623    -12.72    0.000      .5972363     .6853565
     ip98c01 |    .8381196    .0235192     -6.29    0.000      .7932676     .8855076
     ip98c02 |    .9262267    .0234519     -3.03    0.002      .8813836     .9733513
     ip98c03 |     1.02047    .0162197      1.27    0.202      .9891698      1.05276
     ip98c04 |    1.072776    .0213788      3.53    0.000      1.031682     1.115507
     ip99c00 |    .3364202    .0142055    -25.80    0.000      .3096988     .3654471
     ip99c01 |    .6634267    .0190786    -14.27    0.000      .6270677     .7018938
     ip99c02 |    .8422438    .0227652     -6.35    0.000      .7987862     .8880658
     ip99c03 |    .9433526    .0217582     -2.53    0.011      .9016568     .9869766
     ip99c04 |    1.009148    .0205163      0.45    0.654      .9697277     1.050171
     ip00c00 |    .0942451    .0103216    -21.57    0.000      .0760391     .1168103
     ip00c01 |    .3852015    .0152388    -24.11    0.000      .3564625     .4162574
     ip00c02 |    .7126912    .0228512    -10.56    0.000      .6692819     .7589161
     ip00c03 |    .9302159    .0216155     -3.11    0.002      .8888006     .9735611
     ip00c04 |    1.016255    .0187141      0.88    0.381      .9802303     1.053604
     ip01c01 |     .094022    .0101388    -21.92    0.000      .0761099     .1161496
     ip01c02 |    .4007431    .0144132    -25.42    0.000      .3734665     .4300119
     ip01c03 |     .751965    .0156611    -13.69    0.000      .7218879     .7832952
     ip01c04 |    .9499214    .0158128     -3.09    0.002      .9194289     .9814251
     ip02c02 |    .1213509    .0150998    -16.95    0.000      .0950883      .154867
     ip02c03 |    .4822509     .016338    -21.53    0.000       .451269     .5153599
     ip02c04 |     .839801    .0161966     -9.05    0.000      .8086488     .8721533
     ip03c03 |    .1609561     .014964    -19.65    0.000      .1341442      .193127
     ip03c04 |    .6050847    .0159563    -19.05    0.000      .5746053     .6371808
     ip04c04 |    .2825589    .0248238    -14.39    0.000      .2378636     .3356525
       d1c95 |    .8463293    .0510795     -2.76    0.006      .7519099     .9526052
       d1c00 |    .9673885    .0438365     -0.73    0.464      .8851755     1.057237
       d2c95 |    .8570579    .0500061     -2.64    0.008      .7644442     .9608919
       d2c00 |    1.003892    .0487925      0.08    0.936      .9126741     1.104227
-------------+----------------------------------------------------------------
Wald chi2(49) =  8663.03                                Prob > chi2 =   0.0000

.  * Column 4: Volume fixed effects and age profile;
. xtpqml cit ip* ia1j* ia2j* d1c* d2c*, i(volume) irr fe cluster(journal);
note: 100 groups (100 obs) dropped because of only one obs per group
note: 18 groups (108 obs) dropped because of all zero outcomes
note: ia1journal49 dropped because of collinearity
note: ia1journal85 dropped because of collinearity
note: ia2journal49 dropped because of collinearity
note: ia2journal85 dropped because of collinearity

Iteration 0:   log likelihood = -63847.455
Iteration 1:   log likelihood = -18947.028
Iteration 2:   log likelihood = -15055.132
Iteration 3:   log likelihood = -14885.099
Iteration 4:   log likelihood = -14884.199
Iteration 5:   log likelihood = -14884.199

Conditional fixed-effects Poisson regression    Number of obs     =      5,292
Group variable: volume                          Number of groups  =        882

                                                Obs per group:
                                                              min =          2
                                                              avg =        6.0
                                                              max =         10

                                                Wald chi2(243)    =   56570.60
Log likelihood  = -14884.199                    Prob > chi2       =     0.0000

--------------+----------------------------------------------------------------
           cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
--------------+----------------------------------------------------------------
      ip96c96 |   -2.373435    .0586344    -40.48    0.000     -2.488356    -2.258514
      ip96c97 |   -.9253422    .0451547    -20.49    0.000     -1.013844    -.8368407
      ip96c98 |   -.2891634    .0441349     -6.55    0.000     -.3756661    -.2026606
      ip96c99 |   -.1093792    .0443872     -2.46    0.014     -.1963766    -.0223818
      ip97c97 |   -2.392462    .0587092    -40.75    0.000      -2.50753    -2.277394
      ip97c98 |   -.8776761    .0417654    -21.01    0.000     -.9595347    -.7958174
      ip97c99 |   -.3344612     .038358     -8.72    0.000     -.4096416    -.2592808
      ip98c98 |   -2.366622    .0588249    -40.23    0.000     -2.481917    -2.251328
      ip98c99 |   -.8884675    .0401966    -22.10    0.000     -.9672514    -.8096835
      ip99c99 |   -2.297429    .0586386    -39.18    0.000     -2.412359      -2.1825
      ip96c00 |   -.0306622    .0385276     -0.80    0.426      -.106175     .0448505
      ip96c01 |    .0352132     .036658      0.96    0.337      -.036635     .1070615
      ip96c02 |     .011811    .0327074      0.36    0.718     -.0522944     .0759164
      ip96c03 |    .0658078       .0266      2.47    0.013      .0136729     .1179428
      ip96c04 |    .0784404    .0192896      4.07    0.000      .0406334     .1162474
      ip97c00 |   -.1438907    .0296936     -4.85    0.000     -.2020891    -.0856924
      ip97c01 |   -.0649049    .0286202     -2.27    0.023     -.1209994    -.0088104
      ip97c02 |   -.0217026    .0264031     -0.82    0.411     -.0734516     .0300465
      ip97c03 |    .0568735    .0225155      2.53    0.012      .0127439     .1010031
      ip97c04 |    .0537105    .0177047      3.03    0.002      .0190099      .088411
      ip98c00 |      -.3653    .0266232    -13.72    0.000     -.4174805    -.3131195
      ip98c01 |   -.1207123    .0231867     -5.21    0.000     -.1661574    -.0752673
      ip98c02 |   -.0434145     .021287     -2.04    0.041     -.0851363    -.0016927
      ip98c03 |    .0363478    .0189968      1.91    0.056     -.0008853     .0735809
      ip98c04 |    .0753405    .0161934      4.65    0.000       .043602      .107079
      ip99c00 |   -.9746023    .0331569    -29.39    0.000     -1.039589    -.9096159
      ip99c01 |   -.3258076    .0239936    -13.58    0.000     -.3728341     -.278781
      ip99c02 |   -.1154014    .0194245     -5.94    0.000     -.1534727    -.0773302
      ip99c03 |   -.0265475    .0170673     -1.56    0.120     -.0599989     .0069038
      ip99c04 |    .0219392    .0153478      1.43    0.153     -.0081419     .0520204
      ip00c00 |   -2.250157    .0559819    -40.19    0.000     -2.359879    -2.140434
      ip00c01 |   -.8482486    .0320231    -26.49    0.000     -.9110126    -.7854845
      ip00c02 |   -.2610734    .0221527    -11.79    0.000     -.3044918     -.217655
      ip00c03 |   -.0235389    .0174031     -1.35    0.176     -.0576484     .0105705
      ip00c04 |    .0384163    .0153342      2.51    0.012      .0083618     .0684708
      ip01c01 |   -2.257046     .054728    -41.24    0.000     -2.364311    -2.149781
      ip01c02 |   -.8262499    .0293061    -28.19    0.000     -.8836887    -.7688111
      ip01c03 |   -.2271843    .0200936    -11.31    0.000     -.2665669    -.1878016
      ip01c04 |   -.0243951     .015977     -1.53    0.127     -.0557095     .0069193
      ip02c02 |   -2.033421    .0508693    -39.97    0.000     -2.133124    -1.933719
      ip02c03 |     -.67002    .0261683    -25.60    0.000     -.7213089     -.618731
      ip02c04 |   -.1445442    .0180566     -8.01    0.000     -.1799345    -.1091539
      ip03c03 |   -1.774855    .0463289    -38.31    0.000     -1.865658    -1.684052
      ip03c04 |   -.4691115    .0227021    -20.66    0.000     -.5136068    -.4246162
      ip04c04 |   -1.238699    .0438459    -28.25    0.000     -1.324635    -1.152762
  ia1journal2 |   -.0651913    .0258852     -2.52    0.012     -.1159253    -.0144572
  ia1journal3 |   -.0231949    .0250948     -0.92    0.355     -.0723797       .02599
  ia1journal4 |    .0344447    .0242342      1.42    0.155     -.0130533     .0819428
  ia1journal5 |    .1098202    .0302363      3.63    0.000      .0505581     .1690823
  ia1journal6 |     .039864    .0260996      1.53    0.127     -.0112902     .0910182
  ia1journal7 |   -.0083918    .0388834     -0.22    0.829     -.0846019     .0678182
  ia1journal8 |    .1005155    .0549087      1.83    0.067     -.0071035     .2081345
  ia1journal9 |     .030818    .0446105      0.69    0.490      -.056617     .1182529
 ia1journal10 |   -.2696079    .0544094     -4.96    0.000     -.3762483    -.1629674
 ia1journal11 |   -.0385441    .0281881     -1.37    0.172     -.0937917     .0167035
 ia1journal12 |   -.0106448     .032717     -0.33    0.745     -.0747688     .0534793
 ia1journal13 |   -.0041779    .0348975     -0.12    0.905     -.0725757     .0642199
 ia1journal14 |    .0525843    .0277491      1.89    0.058     -.0018029     .1069715
 ia1journal15 |   -.0209772    .0213276     -0.98    0.325     -.0627784     .0208241
 ia1journal16 |    .0405047    .0464682      0.87    0.383     -.0505713     .1315806
 ia1journal17 |     .005424    .0503607      0.11    0.914     -.0932811     .1041291
 ia1journal18 |   -.3988293     .065282     -6.11    0.000     -.5267796    -.2708789
 ia1journal19 |    .1728544    .0602849      2.87    0.004      .0546982     .2910107
 ia1journal20 |   -.1287567    .0977565     -1.32    0.188      -.320356     .0628425
 ia1journal21 |    .0933232    .0375845      2.48    0.013      .0196588     .1669875
 ia1journal22 |    .0798935    .0419217      1.91    0.057     -.0022715     .1620586
 ia1journal23 |    .1063661    .0409709      2.60    0.009      .0260646     .1866677
 ia1journal24 |    .1168281    .0529763      2.21    0.027      .0129964     .2206597
 ia1journal25 |    .1222074     .022716      5.38    0.000      .0776849       .16673
 ia1journal26 |    .0433994    .0240062      1.81    0.071     -.0036519     .0904507
 ia1journal27 |    .1717715    .0285143      6.02    0.000      .1158845     .2276586
 ia1journal28 |   -.1386859     .041608     -3.33    0.001     -.2202361    -.0571357
 ia1journal29 |   -.0884234    .0723098     -1.22    0.221      -.230148     .0533012
 ia1journal30 |   -.0051476    .0429405     -0.12    0.905     -.0893094     .0790143
 ia1journal31 |    .0103304    .0379133      0.27    0.785     -.0639783     .0846391
 ia1journal32 |    .1307851    .0236884      5.52    0.000      .0843568     .1772134
 ia1journal33 |    .1393035    .0229165      6.08    0.000      .0943879     .1842191
 ia1journal34 |    .2736096    .0378278      7.23    0.000      .1994685     .3477508
 ia1journal35 |    .1513823    .0332284      4.56    0.000      .0862559     .2165087
 ia1journal36 |   -.0016755    .0396921     -0.04    0.966     -.0794706     .0761197
 ia1journal37 |   -.0664633     .044817     -1.48    0.138      -.154303     .0213763
 ia1journal38 |   -.0807817    .0513066     -1.57    0.115     -.1813409     .0197775
 ia1journal39 |    .1370214    .0578127      2.37    0.018      .0237106     .2503323
 ia1journal40 |   -.0708312    .0980911     -0.72    0.470     -.2630862     .1214239
 ia1journal41 |    .1745544    .0395383      4.41    0.000      .0970608      .252048
 ia1journal42 |    .0867747    .0520754      1.67    0.096     -.0152912     .1888405
 ia1journal43 |    .0028189    .0472822      0.06    0.952     -.0898525     .0954903
 ia1journal44 |   -.0731672    .0563189     -1.30    0.194     -.1835503     .0372159
 ia1journal45 |    .1112883    .0484569      2.30    0.022      .0163145     .2062621
 ia1journal46 |   -.0598826    .0486353     -1.23    0.218     -.1552061     .0354408
 ia1journal47 |    .0870008    .0289501      3.01    0.003      .0302597     .1437419
 ia1journal48 |   -.1063621    .0834082     -1.28    0.202     -.2698392      .057115
 ia1journal50 |   -.0421914    .0304393     -1.39    0.166     -.1018514     .0174686
 ia1journal51 |    .3761507    .0589607      6.38    0.000      .2605898     .4917116
 ia1journal52 |   -.0164879    .0518687     -0.32    0.751     -.1181487     .0851728
 ia1journal53 |    .0424315    .0466974      0.91    0.364     -.0490938     .1339568
 ia1journal54 |    .0713429    .0423235      1.69    0.092     -.0116098     .1542955
 ia1journal55 |    .3533525    .0646809      5.46    0.000      .2265803     .4801247
 ia1journal56 |    .0545932    .0498398      1.10    0.273     -.0430911     .1522775
 ia1journal57 |   -.0879001    .0640837     -1.37    0.170     -.2135019     .0377017
 ia1journal58 |   -.1024334    .0351715     -2.91    0.004     -.1713684    -.0334985
 ia1journal59 |   -.0115034    .0394184     -0.29    0.770     -.0887621     .0657553
 ia1journal60 |     .262009    .0533625      4.91    0.000      .1574204     .3665975
 ia1journal61 |   -.0243263    .0508744     -0.48    0.633     -.1240382     .0753856
 ia1journal62 |     .148519    .0388456      3.82    0.000       .072383      .224655
 ia1journal63 |    .0184845    .0263055      0.70    0.482     -.0330733     .0700423
 ia1journal64 |    .0421618    .0412817      1.02    0.307     -.0387489     .1230725
 ia1journal65 |   -.0350276    .0384905     -0.91    0.363     -.1104676     .0404125
 ia1journal66 |   -.0776144     .030523     -2.54    0.011     -.1374383    -.0177904
 ia1journal67 |    .0573301    .0353818      1.62    0.105     -.0120169     .1266772
 ia1journal68 |   -.0723717    .0247368     -2.93    0.003     -.1208549    -.0238884
 ia1journal69 |   -.0343786    .0300565     -1.14    0.253     -.0932884     .0245311
 ia1journal70 |    .0426028    .0322045      1.32    0.186     -.0205168     .1057224
 ia1journal71 |    .1133912     .047095      2.41    0.016      .0210867     .2056957
 ia1journal72 |   -.1040865    .0456791     -2.28    0.023     -.1936158    -.0145572
 ia1journal73 |   -.1551673    .0497354     -3.12    0.002      -.252647    -.0576877
 ia1journal74 |    .2470936    .0355752      6.95    0.000      .1773675     .3168196
 ia1journal75 |    .3292691    .0432394      7.62    0.000      .2445215     .4140167
 ia1journal76 |    .2070638     .029357      7.05    0.000       .149525     .2646026
 ia1journal77 |    .0940289    .0318655      2.95    0.003      .0315736     .1564842
 ia1journal78 |    .1262446    .0339507      3.72    0.000      .0597024     .1927868
 ia1journal79 |    .2459818    .0451434      5.45    0.000      .1575023     .3344612
 ia1journal80 |    .0116485    .0306853      0.38    0.704     -.0484936     .0717906
 ia1journal81 |    .2458552    .0551305      4.46    0.000      .1378014     .3539089
 ia1journal82 |    .0422724    .0514044      0.82    0.411     -.0584783     .1430231
 ia1journal83 |    .0307014    .0411078      0.75    0.455     -.0498684     .1112712
 ia1journal84 |    .0677526    .0410369      1.65    0.099     -.0126783     .1481835
 ia1journal86 |    .1646132    .0710696      2.32    0.021      .0253193      .303907
 ia1journal87 |    .0967582    .0549158      1.76    0.078     -.0108747     .2043912
 ia1journal88 |    .1421987    .0557685      2.55    0.011      .0328943      .251503
 ia1journal89 |    .0239673    .0462723      0.52    0.604     -.0667247     .1146593
 ia1journal90 |   -.0175607    .0261908     -0.67    0.503     -.0688937     .0337724
 ia1journal91 |   -.0750601    .0769684     -0.98    0.329     -.2259153     .0757952
 ia1journal92 |    .1972777    .0708342      2.79    0.005      .0584453     .3361101
 ia1journal93 |    .1512065    .0316544      4.78    0.000       .089165     .2132479
 ia1journal94 |   -1.199527    .0504297    -23.79    0.000     -1.298368    -1.100687
 ia1journal95 |    .1604818    .1405654      1.14    0.254     -.1150213      .435985
 ia1journal96 |    .0950002    .0594436      1.60    0.110     -.0215072     .2115075
 ia1journal97 |   -.1491842    .1058581     -1.41    0.159     -.3566621     .0582938
 ia1journal98 |    .0190232    .0628878      0.30    0.762     -.1042346      .142281
 ia1journal99 |   -.1565178      .05989     -2.61    0.009     -.2738999    -.0391356
ia1journal100 |    .1185984    .0634742      1.87    0.062     -.0058088     .2430056
  ia2journal2 |   -.0005575    .0028921     -0.19    0.847     -.0062258     .0051109
  ia2journal3 |    .0064819    .0026476      2.45    0.014      .0012926     .0116712
  ia2journal4 |   -.0005656     .002609     -0.22    0.828     -.0056792     .0045479
  ia2journal5 |   -.0088424    .0032147     -2.75    0.006     -.0151431    -.0025417
  ia2journal6 |   -.0007267    .0027479     -0.26    0.791     -.0061126     .0046591
  ia2journal7 |   -.0016563    .0041174     -0.40    0.687     -.0097263     .0064137
  ia2journal8 |   -.0067286    .0059891     -1.12    0.261     -.0184671     .0050099
  ia2journal9 |    .0004859     .004662      0.10    0.917     -.0086515     .0096234
 ia2journal10 |    .0158601    .0062599      2.53    0.011       .003591     .0281291
 ia2journal11 |    .0016083      .00303      0.53    0.596     -.0043305      .007547
 ia2journal12 |    .0058648    .0035065      1.67    0.094     -.0010078     .0127374
 ia2journal13 |    .0030295    .0038015      0.80    0.425     -.0044213     .0104803
 ia2journal14 |   -.0074848    .0029947     -2.50    0.012     -.0133543    -.0016154
 ia2journal15 |    .0048964    .0022895      2.14    0.032       .000409     .0093838
 ia2journal16 |    -.000396    .0048378     -0.08    0.935     -.0098778     .0090858
 ia2journal17 |    .0017467    .0055526      0.31    0.753     -.0091362     .0126297
 ia2journal18 |    .0221818    .0078625      2.82    0.005      .0067715      .037592
 ia2journal19 |   -.0224181    .0065211     -3.44    0.001     -.0351992    -.0096369
 ia2journal20 |    .0084008     .010735      0.78    0.434     -.0126393      .029441
 ia2journal21 |   -.0080296     .004026     -1.99    0.046     -.0159204    -.0001389
 ia2journal22 |   -.0074946    .0045896     -1.63    0.102     -.0164901     .0015009
 ia2journal23 |   -.0090776    .0044549     -2.04    0.042     -.0178091    -.0003461
 ia2journal24 |   -.0152429     .005746     -2.65    0.008     -.0265048    -.0039809
 ia2journal25 |   -.0059177    .0023727     -2.49    0.013     -.0105681    -.0012674
 ia2journal26 |    .0002953    .0025508      0.12    0.908     -.0047042     .0052948
 ia2journal27 |   -.0093701    .0029473     -3.18    0.001     -.0151466    -.0035936
 ia2journal28 |    .0201021    .0044255      4.54    0.000      .0114282     .0287759
 ia2journal29 |   -.0042143    .0081502     -0.52    0.605     -.0201885     .0117598
 ia2journal30 |    .0036935    .0047568      0.78    0.437     -.0056298     .0130167
 ia2journal31 |    .0032975    .0041159      0.80    0.423     -.0047696     .0113646
 ia2journal32 |   -.0072454    .0025124     -2.88    0.004     -.0121696    -.0023213
 ia2journal33 |   -.0071011    .0023803     -2.98    0.003     -.0117665    -.0024357
 ia2journal34 |   -.0244358    .0039672     -6.16    0.000     -.0322114    -.0166603
 ia2journal35 |   -.0124047    .0036284     -3.42    0.001     -.0195163     -.005293
 ia2journal36 |    .0027388    .0042085      0.65    0.515     -.0055098     .0109874
 ia2journal37 |   -.0016507    .0049384     -0.33    0.738     -.0113298     .0080284
 ia2journal38 |    .0015046    .0058053      0.26    0.795     -.0098735     .0128827
 ia2journal39 |   -.0095096    .0061833     -1.54    0.124     -.0216287     .0026094
 ia2journal40 |   -.0292334    .0130224     -2.24    0.025     -.0547569      -.00371
 ia2journal41 |   -.0171865    .0043017     -4.00    0.000     -.0256177    -.0087553
 ia2journal42 |   -.0213635    .0061724     -3.46    0.001     -.0334613    -.0092658
 ia2journal43 |   -.0029906    .0051806     -0.58    0.564     -.0131443     .0071631
 ia2journal44 |    .0009326    .0064829      0.14    0.886     -.0117738     .0136389
 ia2journal45 |   -.0125829    .0052309     -2.41    0.016     -.0228352    -.0023306
 ia2journal46 |    -.001585    .0054854     -0.29    0.773     -.0123362     .0091661
 ia2journal47 |   -.0075408     .003073     -2.45    0.014     -.0135638    -.0015178
 ia2journal48 |    .0039447    .0094001      0.42    0.675     -.0144793     .0223686
 ia2journal50 |    .0050563    .0032459      1.56    0.119     -.0013057     .0114182
 ia2journal51 |   -.0407701    .0061995     -6.58    0.000     -.0529209    -.0286194
 ia2journal52 |    .0043382    .0056402      0.77    0.442     -.0067164     .0153929
 ia2journal53 |   -.0026926    .0050749     -0.53    0.596     -.0126392     .0072541
 ia2journal54 |    .0008261     .004506      0.18    0.855     -.0080055     .0096577
 ia2journal55 |   -.0337967     .006875     -4.92    0.000     -.0472714    -.0203219
 ia2journal56 |   -.0093388    .0054108     -1.73    0.084     -.0199438     .0012661
 ia2journal57 |    .0015261    .0071882      0.21    0.832     -.0125626     .0156147
 ia2journal58 |    .0083294    .0039297      2.12    0.034      .0006274     .0160314
 ia2journal59 |    .0024947    .0042052      0.59    0.553     -.0057473     .0107367
 ia2journal60 |   -.0134875    .0054836     -2.46    0.014     -.0242351    -.0027398
 ia2journal61 |   -.0075072    .0058657     -1.28    0.201     -.0190038     .0039894
 ia2journal62 |   -.0128687    .0041174     -3.13    0.002     -.0209387    -.0047986
 ia2journal63 |   -.0012068    .0027769     -0.43    0.664     -.0066495     .0042359
 ia2journal64 |   -.0058006    .0046792     -1.24    0.215     -.0149717     .0033705
 ia2journal65 |    -.000335    .0042736     -0.08    0.938     -.0087111     .0080411
 ia2journal66 |    .0059613    .0033105      1.80    0.072     -.0005273     .0124498
 ia2journal67 |   -.0046728    .0037251     -1.25    0.210     -.0119738     .0026283
 ia2journal68 |    .0119488    .0026581      4.50    0.000       .006739     .0171585
 ia2journal69 |    .0030477     .003304      0.92    0.356     -.0034281     .0095235
 ia2journal70 |   -.0070017    .0035877     -1.95    0.051     -.0140335     .0000301
 ia2journal71 |   -.0145125    .0051393     -2.82    0.005     -.0245853    -.0044397
 ia2journal72 |    .0102825    .0050824      2.02    0.043      .0003211      .020244
 ia2journal73 |    .0145555    .0056064      2.60    0.009      .0035672     .0255437
 ia2journal74 |   -.0169058    .0037811     -4.47    0.000     -.0243166     -.009495
 ia2journal75 |   -.0299482    .0046166     -6.49    0.000     -.0389966    -.0208997
 ia2journal76 |   -.0113226    .0030146     -3.76    0.000      -.017231    -.0054141
 ia2journal77 |   -.0066823    .0034379     -1.94    0.052     -.0134204     .0000558
 ia2journal78 |   -.0101498    .0036523     -2.78    0.005     -.0173082    -.0029913
 ia2journal79 |   -.0224284    .0047613     -4.71    0.000     -.0317604    -.0130964
 ia2journal80 |   -.0010346    .0033185     -0.31    0.755     -.0075387     .0054696
 ia2journal81 |   -.0153885    .0057482     -2.68    0.007     -.0266547    -.0041223
 ia2journal82 |   -.0074924    .0057943     -1.29    0.196      -.018849     .0038642
 ia2journal83 |   -.0003016    .0044824     -0.07    0.946     -.0090869     .0084837
 ia2journal84 |   -.0123885     .004465     -2.77    0.006     -.0211397    -.0036374
 ia2journal86 |   -.0171636     .007767     -2.21    0.027     -.0323866    -.0019406
 ia2journal87 |    -.010269    .0058689     -1.75    0.080      -.021772     .0012339
 ia2journal88 |   -.0113806    .0059002     -1.93    0.054     -.0229447     .0001836
 ia2journal89 |   -.0048862    .0048163     -1.01    0.310      -.014326     .0045537
 ia2journal90 |   -.0023109    .0028822     -0.80    0.423     -.0079599     .0033381
 ia2journal91 |   -.0000921    .0086887     -0.01    0.992     -.0171217     .0169375
 ia2journal92 |   -.0198965     .007803     -2.55    0.011     -.0351901    -.0046029
 ia2journal93 |   -.0175016    .0034034     -5.14    0.000      -.024172    -.0108311
 ia2journal94 |    .1116621    .0058537     19.08    0.000       .100189     .1231352
 ia2journal95 |   -.0298946    .0166293     -1.80    0.072     -.0624874     .0026982
 ia2journal96 |   -.0048878    .0063512     -0.77    0.442     -.0173359     .0075603
 ia2journal97 |    .0047843    .0124218      0.39    0.700      -.019562     .0291305
 ia2journal98 |   -.0041017    .0067948     -0.60    0.546     -.0174192     .0092158
 ia2journal99 |    .0019801    .0069175      0.29    0.775     -.0115779     .0155382
ia2journal100 |   -.0139714    .0070041     -1.99    0.046     -.0276991    -.0002436
        d1c95 |    -.024715    .0232333     -1.06    0.287     -.0702515     .0208215
        d1c00 |   -.0034424    .0249454     -0.14    0.890     -.0523346     .0454497
        d2c95 |    .0245825    .0228805      1.07    0.283     -.0202625     .0694275
        d2c00 |    .0258984    .0229113      1.13    0.258      -.019007     .0708037
--------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
--------------+----------------------------------------------------------------
           cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
--------------+----------------------------------------------------------------
cit           |
      ip96c96 |    .0931602    .0073776    -29.97    0.000      .0797667     .1088025
      ip96c97 |    .3963957    .0163809    -22.39    0.000      .3655555     .4298378
      ip96c98 |    .7488898    .0262843     -8.24    0.000      .6991055     .8022194
      ip96c99 |    .8963904    .0339684     -2.89    0.004       .832226      .965502
      ip97c97 |    .0914044    .0062735    -34.86    0.000      .0798997     .1045656
      ip97c98 |     .415748    .0186467    -19.57    0.000      .3807614     .4539493
      ip97c99 |    .7157236    .0281745     -8.50    0.000      .6625792     .7731307
      ip98c98 |     .093797    .0084928    -26.14    0.000      .0785448     .1120109
      ip98c99 |    .4112856    .0196575    -18.59    0.000      .3745071     .4516759
      ip99c99 |    .1005169    .0086665    -26.65    0.000      .0848885     .1190226
      ip96c00 |    .9698031    .0167698     -1.77    0.076      .9374857     1.003235
      ip96c01 |    1.035841     .021777      1.67    0.094      .9940259     1.079414
      ip96c02 |    1.011881    .0221624      0.54    0.590      .9693626     1.056264
      ip96c03 |    1.068021     .023461      3.00    0.003      1.023014     1.115009
      ip96c04 |    1.081599    .0216142      3.93    0.000      1.040055     1.124803
      ip97c00 |    .8659824    .0183985     -6.77    0.000      .8306625      .902804
      ip97c01 |    .9371565    .0163447     -3.72    0.000      .9056628     .9697455
      ip97c02 |    .9785312    .0158654     -1.34    0.181      .9479246     1.010126
      ip97c03 |    1.058522    .0194419      3.10    0.002      1.021094     1.097321
      ip97c04 |    1.055179    .0192482      2.94    0.003       1.01812     1.093587
      ip98c00 |    .6939884     .017845    -14.21    0.000      .6598797     .7298602
      ip98c01 |    .8862889    .0208787     -5.12    0.000      .8462977     .9281698
      ip98c02 |    .9575144    .0214817     -1.94    0.053      .9163232     1.000557
      ip98c03 |    1.037016    .0146554      2.57    0.010      1.008687     1.066142
      ip98c04 |    1.078251    .0199185      4.08    0.000       1.03991     1.118006
      ip99c00 |    .3773424    .0148914    -24.70    0.000       .349256     .4076875
      ip99c01 |    .7219441    .0199923    -11.77    0.000      .6838043     .7622112
      ip99c02 |    .8910084     .022708     -4.53    0.000      .8475947     .9366457
      ip99c03 |    .9738017    .0221872     -1.17    0.244      .9312723     1.018273
      ip99c04 |    1.022182    .0212298      1.06    0.291      .9814076      1.06465
      ip00c00 |    .1053827    .0078429    -30.23    0.000      .0910795     .1219321
      ip00c01 |    .4281642    .0155389    -23.37    0.000      .3987664     .4597293
      ip00c02 |    .7702244    .0169367    -11.87    0.000      .7377343     .8041454
      ip00c03 |    .9767359    .0203054     -1.13    0.258      .9377381     1.017356
      ip00c04 |    1.039164    .0193001      2.07    0.039      1.002016     1.077688
      ip01c01 |    .1046592    .0100252    -23.56    0.000      .0867444     .1262738
      ip01c02 |    .4376876     .013437    -26.91    0.000      .4121282     .4648321
      ip01c03 |    .7967739    .0173235    -10.45    0.000      .7635338     .8314611
      ip01c04 |    .9759001    .0180163     -1.32    0.186      .9412199     1.011858
      ip02c02 |    .1308869    .0143689    -18.52    0.000      .1055481     .1623088
      ip02c03 |    .5116984    .0179361    -19.11    0.000      .4777246     .5480882
      ip02c04 |    .8654167    .0178295     -7.02    0.000      .8311675     .9010771
      ip03c03 |     .169508    .0129262    -23.27    0.000      .1459755     .1968342
      ip03c04 |    .6255578    .0171393    -17.12    0.000      .5928514     .6600686
      ip04c04 |     .289761    .0205369    -17.48    0.000        .25218     .3329425
  ia1journal2 |    .9368883    .0015298    -39.93    0.000      .9338948     .9398913
  ia1journal3 |    .9770721    .0106978     -2.12    0.034      .9563282     .9982659
  ia1journal4 |    1.035045    .0107848      3.31    0.001      1.014121       1.0564
  ia1journal5 |    1.116077    .0132266      9.27    0.000      1.090452     1.142305
  ia1journal6 |    1.040669     .011259      3.68    0.000      1.018834     1.062972
  ia1journal7 |    .9916433    .0113261     -0.73    0.462      .9696912     1.014092
  ia1journal8 |    1.105741    .0139197      7.98    0.000      1.078792     1.133362
  ia1journal9 |    1.031298    .0083306      3.82    0.000      1.015099     1.047755
 ia1journal10 |    .7636789    .0110963    -18.56    0.000      .7422372       .78574
 ia1journal11 |    .9621893    .0113357     -3.27    0.001      .9402262     .9846654
 ia1journal12 |    .9894117    .0057409     -1.83    0.067      .9782234     1.000728
 ia1journal13 |    .9958308     .009903     -0.42    0.674      .9766093     1.015431
 ia1journal14 |    1.053991    .0085413      6.49    0.000      1.037383     1.070866
 ia1journal15 |    .9792413    .0102667     -2.00    0.045      .9593244     .9995718
 ia1journal16 |    1.041336    .0110208      3.83    0.000      1.019958     1.063162
 ia1journal17 |    1.005439    .0104233      0.52    0.601      .9852155     1.026077
 ia1journal18 |    .6711053    .0097683    -27.40    0.000      .6522302     .6905266
 ia1journal19 |    1.188693    .0131362     15.64    0.000      1.163223      1.21472
 ia1journal20 |    .8791878    .0096391    -11.74    0.000      .8604971     .8982845
 ia1journal21 |    1.097816    .0114782      8.93    0.000      1.075549     1.120545
 ia1journal22 |    1.083172    .0111046      7.79    0.000      1.061624     1.105157
 ia1journal23 |    1.112229    .0075291     15.71    0.000       1.09757     1.127084
 ia1journal24 |    1.123926    .0063537     20.67    0.000      1.111542     1.136449
 ia1journal25 |    1.129988    .0109045     12.66    0.000      1.108817     1.151564
 ia1journal26 |    1.044355    .0109092      4.15    0.000      1.023191     1.065957
 ia1journal27 |    1.187407    .0128067     15.93    0.000      1.162569     1.212774
 ia1journal28 |    .8705014    .0077819    -15.51    0.000      .8553819     .8858881
 ia1journal29 |    .9153732    .0106305     -7.61    0.000      .8947731     .9364476
 ia1journal30 |    .9948657    .0063802     -0.80    0.422       .982439      1.00745
 ia1journal31 |    1.010384    .0105574      0.99    0.323      .9899024     1.031289
 ia1journal32 |    1.139723     .010268     14.52    0.000      1.119775     1.160026
 ia1journal33 |    1.149473    .0116648     13.73    0.000      1.126836     1.172564
 ia1journal34 |    1.314701    .0140406     25.62    0.000      1.287468     1.342511
 ia1journal35 |    1.163441    .0116089     15.17    0.000      1.140909     1.186418
 ia1journal36 |     .998326      .00804     -0.21    0.835      .9826916     1.014209
 ia1journal37 |    .9356972    .0106286     -5.85    0.000      .9150957     .9567626
 ia1journal38 |     .922395    .0099342     -7.50    0.000      .9031285     .9420726
 ia1journal39 |    1.146853    .0099231     15.84    0.000      1.127568     1.166467
 ia1journal40 |    .9316192       .0111     -5.94    0.000      .9101157     .9536308
 ia1journal41 |    1.190716    .0118485     17.54    0.000      1.167718     1.214166
 ia1journal42 |    1.090651    .0113787      8.32    0.000      1.068576     1.113182
 ia1journal43 |    1.002823     .010445      0.27    0.787      .9825586     1.023505
 ia1journal44 |    .9294454    .0093205     -7.30    0.000      .9113559     .9478941
 ia1journal45 |    1.117717    .0118804     10.47    0.000      1.094673     1.141247
 ia1journal46 |    .9418751    .0118615     -4.76    0.000      .9189116     .9654124
 ia1journal47 |    1.090898    .0089407     10.62    0.000      1.073514     1.108562
 ia1journal48 |     .899099    .0097327     -9.83    0.000      .8802243     .9183785
 ia1journal50 |    .9586863      .00825     -4.90    0.000      .9426521     .9749932
 ia1journal51 |    1.456667    .0077131     71.04    0.000      1.441627     1.471863
 ia1journal52 |    .9836472    .0084087     -1.93    0.054      .9673039     1.000267
 ia1journal53 |    1.043345    .0089803      4.93    0.000      1.025891     1.061095
 ia1journal54 |    1.073949    .0099347      7.71    0.000      1.054653     1.093599
 ia1journal55 |    1.423833    .0148577     33.86    0.000      1.395008     1.453253
 ia1journal56 |    1.056111    .0114458      5.04    0.000      1.033914     1.078784
 ia1journal57 |    .9158524    .0100667     -8.00    0.000      .8963331     .9357967
 ia1journal58 |    .9026382    .0078562    -11.77    0.000      .8873709     .9181682
 ia1journal59 |    .9885625    .0108624     -1.05    0.295      .9675003     1.010083
 ia1journal60 |    1.299538    .0127047     26.80    0.000      1.274875     1.324679
 ia1journal61 |    .9759672    .0104702     -2.27    0.023      .9556603     .9967056
 ia1journal62 |    1.160115    .0097566     17.66    0.000      1.141149     1.179396
 ia1journal63 |    1.018656    .0080997      2.32    0.020      1.002904     1.034656
 ia1journal64 |    1.043063    .0096693      4.55    0.000      1.024283     1.062188
 ia1journal65 |    .9655788     .008013     -4.22    0.000      .9500006     .9814125
 ia1journal66 |    .9253212     .010386     -6.91    0.000      .9051873     .9459029
 ia1journal67 |    1.059005    .0117556      5.16    0.000      1.036214     1.082298
 ia1journal68 |    .9301851    .0080087     -8.41    0.000        .91462     .9460151
 ia1journal69 |    .9662056    .0083903     -3.96    0.000      .9499001      .982791
 ia1journal70 |    1.043523    .0088272      5.04    0.000      1.026365     1.060968
 ia1journal71 |     1.12007    .0089857     14.13    0.000      1.102596     1.137821
 ia1journal72 |    .9011474    .0054803    -17.12    0.000      .8904699     .9119529
 ia1journal73 |    .8562719     .013974     -9.51    0.000      .8293168     .8841031
 ia1journal74 |    1.280299    .0129223     24.48    0.000      1.255221     1.305878
 ia1journal75 |    1.389952    .0179247     25.53    0.000       1.35526     1.425531
 ia1journal76 |    1.230061    .0134396     18.95    0.000         1.204     1.256686
 ia1journal77 |    1.098592    .0113343      9.11    0.000        1.0766     1.121032
 ia1journal78 |     1.13456    .0100167     14.30    0.000      1.115096     1.154363
 ia1journal79 |    1.278876    .0106639     29.50    0.000      1.258145     1.299949
 ia1journal80 |    1.011717    .0083453      1.41    0.158      .9954916     1.028206
 ia1journal81 |    1.278714    .0130788     24.04    0.000      1.253336     1.304607
 ia1journal82 |    1.043179    .0093068      4.74    0.000      1.025096      1.06158
 ia1journal83 |    1.031178    .0107883      2.93    0.003      1.010248     1.052541
 ia1journal84 |      1.0701    .0104659      6.93    0.000      1.049783     1.090811
 ia1journal86 |    1.178937    .0123435     15.72    0.000      1.154991      1.20338
 ia1journal87 |    1.101594    .0141542      7.53    0.000      1.074199     1.129688
 ia1journal88 |    1.152806    .0095781     17.11    0.000      1.134185     1.171732
 ia1journal89 |    1.024257     .008532      2.88    0.004       1.00767     1.041117
 ia1journal90 |    .9825926    .0081742     -2.11    0.035      .9667014     .9987451
 ia1journal91 |    .9276877    .0055441    -12.56    0.000      .9168848     .9386179
 ia1journal92 |    1.218082    .0133856     17.95    0.000      1.192127     1.244602
 ia1journal93 |    1.163237    .0122426     14.37    0.000      1.139487     1.187481
 ia1journal94 |    .3013367    .0055336    -65.32    0.000      .2906839     .3123799
 ia1journal95 |    1.174076     .011559     16.30    0.000      1.151638     1.196952
 ia1journal96 |    1.099659    .0099718     10.48    0.000      1.080287     1.119378
 ia1journal97 |    .8614105     .009348    -13.75    0.000      .8432821     .8799285
 ia1journal98 |    1.019205    .0151405      1.28    0.200      .9899583     1.049316
 ia1journal99 |    .8551163     .006416    -20.86    0.000      .8426333     .8677843
ia1journal100 |    1.125918    .0135344      9.87    0.000      1.099701      1.15276
  ia2journal2 |    .9994427    .0001864     -2.99    0.003      .9990774     .9998081
  ia2journal3 |    1.006503    .0009199      7.09    0.000      1.004702     1.008308
  ia2journal4 |    .9994345    .0008774     -0.64    0.519      .9977163     1.001156
  ia2journal5 |    .9911966    .0013032     -6.73    0.000      .9886457     .9937541
  ia2journal6 |    .9992735    .0009042     -0.80    0.422      .9975029     1.001047
  ia2journal7 |    .9983451    .0009423     -1.75    0.079      .9964999     1.000194
  ia2journal8 |     .993294    .0011584     -5.77    0.000      .9910261     .9955671
  ia2journal9 |    1.000486    .0007042      0.69    0.490      .9991069     1.001867
 ia2journal10 |    1.015986    .0019501      8.26    0.000      1.012171     1.019816
 ia2journal11 |     1.00161    .0013019      1.24    0.216      .9990612     1.004164
 ia2journal12 |    1.005882    .0007998      7.38    0.000      1.004316     1.007451
 ia2journal13 |    1.003034      .00101      3.01    0.003      1.001057     1.005016
 ia2journal14 |    .9925431    .0006848    -10.85    0.000      .9912018     .9938863
 ia2journal15 |    1.004908    .0008882      5.54    0.000      1.003169     1.006651
 ia2journal16 |    .9996041     .000899     -0.44    0.660      .9978437     1.001368
 ia2journal17 |    1.001748    .0008691      2.01    0.044      1.000046     1.003453
 ia2journal18 |     1.02243      .00159     14.26    0.000      1.019318     1.025551
 ia2journal19 |    .9778313    .0012117    -18.09    0.000      .9754593     .9802091
 ia2journal20 |    1.008436    .0009383      9.03    0.000      1.006599     1.010277
 ia2journal21 |    .9920025     .000883     -9.02    0.000      .9902733     .9937347
 ia2journal22 |    .9925334    .0008606     -8.64    0.000      .9908481     .9942216
 ia2journal23 |    .9909635    .0008839    -10.18    0.000      .9892326     .9926974
 ia2journal24 |    .9848727    .0008915    -16.84    0.000       .983127     .9866215
 ia2journal25 |    .9940997    .0008326     -7.07    0.000      .9924692      .995733
 ia2journal26 |    1.000295    .0008811      0.34    0.737      .9985698     1.002024
 ia2journal27 |    .9906737    .0008983    -10.33    0.000      .9889147     .9924359
 ia2journal28 |    1.020305    .0007896     25.97    0.000      1.018759     1.021854
 ia2journal29 |    .9957945    .0009647     -4.35    0.000      .9939056      .997687
 ia2journal30 |      1.0037    .0009607      3.86    0.000      1.001819     1.005585
 ia2journal31 |    1.003303    .0012803      2.58    0.010      1.000797     1.005815
 ia2journal32 |    .9927808    .0007557     -9.52    0.000      .9913006     .9942631
 ia2journal33 |     .992924    .0008586     -8.21    0.000      .9912426     .9946083
 ia2journal34 |    .9758603    .0008695    -27.42    0.000      .9741575     .9775661
 ia2journal35 |    .9876719     .000846    -14.48    0.000      .9860152     .9893315
 ia2journal36 |    1.002743    .0006733      4.08    0.000      1.001424     1.004063
 ia2journal37 |    .9983507    .0009403     -1.75    0.080      .9965095     1.000195
 ia2journal38 |    1.001506    .0009166      1.64    0.100      .9997109     1.003304
 ia2journal39 |    .9905354    .0007426    -12.69    0.000      .9890811     .9919919
 ia2journal40 |    .9711897    .0010858    -26.15    0.000       .969064     .9733202
 ia2journal41 |    .9829604    .0008631    -19.57    0.000      .9812702     .9846534
 ia2journal42 |     .978863    .0009985    -20.94    0.000       .976908      .980822
 ia2journal43 |    .9970139    .0009031     -3.30    0.001      .9952453     .9987856
 ia2journal44 |    1.000933     .000859      1.09    0.277      .9992509     1.002618
 ia2journal45 |     .987496    .0008833    -14.07    0.000      .9857662     .9892287
 ia2journal46 |    .9984162    .0016208     -0.98    0.329      .9952445     1.001598
 ia2journal47 |    .9924876    .0007034    -10.64    0.000      .9911098     .9938673
 ia2journal48 |    1.003952    .0009095      4.35    0.000      1.002172     1.005737
 ia2journal50 |    1.005069    .0007501      6.78    0.000        1.0036      1.00654
 ia2journal51 |    .9600498    .0004859    -80.56    0.000      .9590979     .9610026
 ia2journal52 |    1.004348    .0007489      5.82    0.000      1.002881     1.005816
 ia2journal53 |    .9973111    .0007462     -3.60    0.000      .9958496     .9987747
 ia2journal54 |    1.000826    .0008061      1.03    0.305      .9992477     1.002408
 ia2journal55 |    .9667681     .000847    -38.58    0.000      .9651094     .9684296
 ia2journal56 |    .9907046    .0008895    -10.40    0.000      .9889629     .9924495
 ia2journal57 |    1.001527    .0008865      1.72    0.085      .9997913     1.003266
 ia2journal58 |    1.008364    .0007736     10.86    0.000      1.006849     1.009882
 ia2journal59 |    1.002498    .0009218      2.71    0.007      1.000693     1.004306
 ia2journal60 |    .9866031    .0008446    -15.75    0.000       .984949     .9882599
 ia2journal61 |    .9925209    .0009109     -8.18    0.000      .9907372     .9943078
 ia2journal62 |    .9872138    .0007192    -17.66    0.000      .9858051     .9886245
 ia2journal63 |    .9987939    .0006914     -1.74    0.081      .9974397      1.00015
 ia2journal64 |    .9942162     .000814     -7.08    0.000       .992622     .9958129
 ia2journal65 |     .999665    .0007284     -0.46    0.646      .9982384     1.001094
 ia2journal66 |    1.005979    .0009506      6.31    0.000      1.004118     1.007844
 ia2journal67 |    .9953381    .0009181     -5.07    0.000      .9935403     .9971392
 ia2journal68 |     1.01202    .0007628     15.85    0.000      1.010526     1.013517
 ia2journal69 |    1.003052    .0007649      4.00    0.000      1.001554     1.004553
 ia2journal70 |    .9930227    .0007296     -9.53    0.000      .9915937     .9944538
 ia2journal71 |    .9855923    .0006799    -21.04    0.000      .9842606     .9869257
 ia2journal72 |    1.010336     .000979     10.61    0.000      1.008419     1.012256
 ia2journal73 |    1.014662    .0019416      7.61    0.000      1.010864     1.018475
 ia2journal74 |    .9832363    .0008305    -20.01    0.000      .9816099     .9848654
 ia2journal75 |    .9704959    .0011463    -25.35    0.000      .9682517     .9727452
 ia2journal76 |    .9887413    .0009119    -12.28    0.000      .9869556     .9905302
 ia2journal77 |      .99334    .0008611     -7.71    0.000      .9916536     .9950292
 ia2journal78 |    .9899016    .0007562    -13.29    0.000      .9884205     .9913849
 ia2journal79 |    .9778213    .0007059    -31.07    0.000      .9764387     .9792058
 ia2journal80 |    .9989659    .0007159     -1.44    0.149      .9975639      1.00037
 ia2journal81 |    .9847293    .0008468    -17.90    0.000      .9830711     .9863903
 ia2journal82 |    .9925356    .0007699     -9.66    0.000      .9910278     .9940457
 ia2journal83 |    .9996984    .0008843     -0.34    0.733      .9979668     1.001433
 ia2journal84 |    .9876879       .0008    -15.29    0.000      .9861211     .9892572
 ia2journal86 |    .9829828    .0008589    -19.64    0.000      .9813009     .9846676
 ia2journal87 |    .9897835    .0010831     -9.38    0.000      .9876629     .9919087
 ia2journal88 |    .9886839    .0007069    -15.92    0.000      .9872994     .9900704
 ia2journal89 |    .9951257    .0006851     -7.10    0.000      .9937839     .9964694
 ia2journal90 |    .9976918     .000722     -3.19    0.001      .9962776     .9991079
 ia2journal91 |    .9999079    .0004801     -0.19    0.848      .9989674     1.000849
 ia2journal92 |    .9803001    .0007811    -24.97    0.000      .9787704     .9818322
 ia2journal93 |    .9826507    .0008595    -20.01    0.000      .9809676     .9843367
 ia2journal94 |    1.118135    .0022965     54.37    0.000      1.113643     1.122645
 ia2journal95 |    .9705478    .0008408    -34.51    0.000      .9689013     .9721972
 ia2journal96 |    .9951241     .000787     -6.18    0.000      .9935828     .9966678
 ia2journal97 |    1.004796    .0009148      5.25    0.000      1.003004      1.00659
 ia2journal98 |    .9959067    .0016389     -2.49    0.013      .9926997      .999124
 ia2journal99 |    1.001982    .0006703      2.96    0.003      1.000669     1.003297
ia2journal100 |    .9861258    .0012806    -10.76    0.000       .983619     .9886389
        d1c95 |    .9755879    .0478285     -0.50    0.614      .8862087     1.073982
        d1c00 |    .9965635    .0368374     -0.09    0.926      .9269169     1.071443
        d2c95 |    1.024887    .0483519      0.52    0.602      .9343687     1.124175
        d2c00 |    1.026237    .0373997      0.71    0.477      .9554912      1.10222
--------------+----------------------------------------------------------------
Wald chi2(243) = -1.3e+19                                Prob > chi2 =   1.0000

.  * Column 5: Evans replication, with journal volume fixed effects, citation lags;
. xtpqml cit cit_lag d1c* d2c*, i(volume) irr fe cluster(journal);
note: 100 groups (100 obs) dropped because of only one obs per group
note: 16 groups (88 obs) dropped because of all zero outcomes

Iteration 0:   log likelihood = -27604.369
Iteration 1:   log likelihood =  -17949.93
Iteration 2:   log likelihood = -17918.147
Iteration 3:   log likelihood = -17918.137
Iteration 4:   log likelihood = -17918.137

Conditional fixed-effects Poisson regression    Number of obs     =      4,312
Group variable: volume                          Number of groups  =        784

                                                Obs per group:
                                                              min =          2
                                                              avg =        5.5
                                                              max =          9

                                                Wald chi2(5)      =   16837.98
Log likelihood  = -17918.137                    Prob > chi2       =     0.0000

-------------+----------------------------------------------------------------
          cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
     cit_lag |    .0027098    .0000303     89.53    0.000      .0026504     .0027691
       d1c95 |    .0030709    .0202324      0.15    0.879      -.036584     .0427257
       d1c00 |    .1143128    .0210585      5.43    0.000      .0730389     .1555867
       d2c95 |      .01911    .0156167      1.22    0.221     -.0114981     .0497181
       d2c00 |    .2882918     .014141     20.39    0.000       .260576     .3160076
-------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
-------------+----------------------------------------------------------------
          cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
-------------+----------------------------------------------------------------
cit          |
     cit_lag |    1.002713    .0003603      7.54    0.000      1.002007      1.00342
       d1c95 |    1.003076     .071361      0.04    0.966      .8725238     1.153161
       d1c00 |    1.121103    .0761998      1.68    0.093      .9812742     1.280856
       d2c95 |    1.019294    .0792366      0.25    0.806      .8752452      1.18705
       d2c00 |    1.334147    .0854625      4.50    0.000      1.176732     1.512619
-------------+----------------------------------------------------------------
Wald chi2(5) =   450.65                                Prob > chi2 =   0.0000

. * Column 6: Combine citation lags with journal volumen fixed effects,
> * time effects, and age profiles;
.   xtpqml cit cit_lag ip* ia1j* ia2j* d1c* d2c*, i(volume) irr fe cluster(journal);
note: 100 groups (100 obs) dropped because of only one obs per group
note: 16 groups (88 obs) dropped because of all zero outcomes
note: ip96c96 dropped because of collinearity
note: ip97c97 dropped because of collinearity
note: ip98c98 dropped because of collinearity
note: ip99c99 dropped because of collinearity
note: ip00c00 dropped because of collinearity
note: ip01c01 dropped because of collinearity
note: ip02c02 dropped because of collinearity
note: ip03c03 dropped because of collinearity
note: ip04c04 dropped because of collinearity
note: ia1journal49 dropped because of collinearity
note: ia1journal85 dropped because of collinearity
note: ia2journal49 dropped because of collinearity
note: ia2journal85 dropped because of collinearity

Iteration 0:   log likelihood = -27604.369
Iteration 1:   log likelihood =  -12521.78
Iteration 2:   log likelihood = -12096.734
Iteration 3:   log likelihood = -12094.555
Iteration 4:   log likelihood = -12094.555

Conditional fixed-effects Poisson regression    Number of obs     =      4,312
Group variable: volume                          Number of groups  =        784

                                                Obs per group:
                                                              min =          2
                                                              avg =        5.5
                                                              max =          9

                                                Wald chi2(235)    =   25280.74
Log likelihood  = -12094.555                    Prob > chi2       =     0.0000

--------------+----------------------------------------------------------------
           cit |      Coef.    Std. Err.       z    P>|z|      [95% Con f. Interval]
--------------+----------------------------------------------------------------
      cit_lag |   -.0003341    .0000909     -3.68    0.000     -.0005122     -.000156
      ip96c97 |   -1.073167     .061515    -17.45    0.000     -1.193734    -.9525996
      ip96c98 |   -.3852795    .0533943     -7.22    0.000     -.4899305    -.2806286
      ip96c99 |   -.1687945    .0486655     -3.47    0.001     -.2641771    -.0734118
      ip97c98 |   -1.019424    .0610873    -16.69    0.000     -1.139152    -.8996946
      ip97c99 |   -.4317302    .0495328     -8.72    0.000     -.5288126    -.3346478
      ip98c99 |   -1.029413    .0603766    -17.05    0.000     -1.147749    -.9110772
      ip96c00 |   -.0738736    .0406029     -1.82    0.069     -.1534537     .0057066
      ip96c01 |    .0151606     .038115      0.40    0.691     -.0595434     .0898645
      ip96c02 |    .0044717    .0341072      0.13    0.896     -.0623772     .0713206
      ip96c03 |    .0617974    .0277508      2.23    0.026      .0074068      .116188
      ip96c04 |    .0804196    .0199111      4.04    0.000      .0413944     .1194447
      ip97c00 |   -.2191994    .0356107     -6.16    0.000      -.288995    -.1494037
      ip97c01 |   -.1094855    .0311014     -3.52    0.000     -.1704431     -.048528
      ip97c02 |   -.0473041    .0276439     -1.71    0.087     -.1014852      .006877
      ip97c03 |    .0442238    .0232442      1.90    0.057     -.0013341     .0897817
      ip97c04 |    .0525975    .0180037      2.92    0.003      .0173109     .0878842
      ip98c00 |   -.4739656    .0406971    -11.65    0.000     -.5537305    -.3942007
      ip98c01 |   -.1930417    .0302896     -6.37    0.000     -.2524083    -.1336751
      ip98c02 |     -.08524    .0239764     -3.56    0.000     -.1322328    -.0382472
      ip98c03 |    .0132563    .0200039      0.66    0.508     -.0259507     .0524632
      ip98c04 |      .06849    .0163705      4.18    0.000      .0364044     .1005757
      ip99c00 |   -1.119951    .0546582    -20.49    0.000     -1.227079    -1.012823
      ip99c01 |   -.4292876    .0385996    -11.12    0.000     -.5049414    -.3536339
      ip99c02 |   -.1784431    .0262302     -6.80    0.000     -.2298534    -.1270328
      ip99c03 |   -.0615584    .0195031     -3.16    0.002     -.0997837     -.023333
      ip99c04 |    .0069046     .015847      0.44    0.663     -.0241549     .0379642
      ip00c01 |   -.9840504    .0522802    -18.82    0.000     -1.086518     -.881583
      ip00c02 |   -.3540303    .0350214    -10.11    0.000     -.4226711    -.2853896
      ip00c03 |   -.0747099    .0226921     -3.29    0.001     -.1191856    -.0302342
      ip00c04 |    .0182459    .0163067      1.12    0.263     -.0137147     .0502065
      ip01c02 |   -.9423249     .046213    -20.39    0.000     -1.032901     -.851749
      ip01c03 |   -.3002551    .0293996    -10.21    0.000     -.3578773    -.2426329
      ip01c04 |    -.054373    .0181869     -2.99    0.003     -.0900186    -.0187274
      ip02c03 |   -.7545717    .0374724    -20.14    0.000     -.8280163    -.6811272
      ip02c04 |   -.1847226    .0217901     -8.48    0.000     -.2274304    -.1420148
      ip03c04 |   -.5116955    .0267602    -19.12    0.000     -.5641446    -.4592465
  ia1journal2 |   -.1569328    .0308879     -5.08    0.000     -.2174719    -.0963936
  ia1journal3 |   -.0592494    .0304778     -1.94    0.052     -.1189848     .0004861
  ia1journal4 |    .0233183    .0286109      0.82    0.415     -.0327579     .0793946
  ia1journal5 |    .0686085    .0360794      1.90    0.057     -.0021057     .1393227
  ia1journal6 |   -.0034216    .0310941     -0.11    0.912      -.064365     .0575218
  ia1journal7 |    .0144487    .0474479      0.30    0.761     -.0785474     .1074448
  ia1journal8 |   -.0117061    .0627896     -0.19    0.852     -.1347715     .1113593
  ia1journal9 |   -.0584116    .0521851     -1.12    0.263     -.1606926     .0438693
 ia1journal10 |   -.3296434    .0669414     -4.92    0.000     -.4608462    -.1984407
 ia1journal11 |   -.0750565     .034025     -2.21    0.027     -.1417443    -.0083687
 ia1journal12 |   -.0403477      .03987     -1.01    0.312     -.1184914      .037796
 ia1journal13 |    .0045674    .0427532      0.11    0.915     -.0792273     .0883621
 ia1journal14 |   -.0062173    .0328334     -0.19    0.850     -.0705696      .058135
 ia1journal15 |   -.0210426     .024694     -0.85    0.394      -.069442     .0273568
 ia1journal16 |   -.0132142    .0547811     -0.24    0.809     -.1205831     .0941547
 ia1journal17 |   -.0505671    .0596283     -0.85    0.396     -.1674363     .0663021
 ia1journal18 |   -.4674908    .0830286     -5.63    0.000     -.6302238    -.3047579
 ia1journal19 |    .0836539    .0689101      1.21    0.225     -.0514074     .2187153
 ia1journal20 |    -.381901    .1093038     -3.49    0.000     -.5961325    -.1676694
 ia1journal21 |    .0103771    .0441225      0.24    0.814     -.0761015     .0968557
 ia1journal22 |     .000443    .0492729      0.01    0.993       -.09613     .0970161
 ia1journal23 |    .1101067    .0487557      2.26    0.024      .0145473     .2056661
 ia1journal24 |    .0290604    .0613532      0.47    0.636     -.0911897     .1493104
 ia1journal25 |     .116021    .0258534      4.49    0.000      .0653493     .1666927
 ia1journal26 |    .0561338    .0281694      1.99    0.046      .0009228     .1113448
 ia1journal27 |    .1091711    .0329642      3.31    0.001      .0445625     .1737797
 ia1journal28 |   -.1697976    .0517287     -3.28    0.001     -.2711839    -.0684113
 ia1journal29 |   -.0950157    .0873741     -1.09    0.277     -.2662658     .0762344
 ia1journal30 |   -.0007544    .0525174     -0.01    0.989     -.1036866     .1021778
 ia1journal31 |     .048749    .0469663      1.04    0.299     -.0433032     .1408012
 ia1journal32 |     .102392    .0275133      3.72    0.000      .0484669     .1563171
 ia1journal33 |    .1357743    .0263525      5.15    0.000      .0841243     .1874243
 ia1journal34 |    .2057556    .0434336      4.74    0.000      .1206274     .2908838
 ia1journal35 |     .063008    .0388641      1.62    0.105     -.0131641     .1391802
 ia1journal36 |   -.0877667    .0471065     -1.86    0.062     -.1800937     .0045603
 ia1journal37 |   -.1307108    .0541018     -2.42    0.016     -.2367483    -.0246732
 ia1journal38 |   -.1146928    .0618983     -1.85    0.064     -.2360113     .0066257
 ia1journal39 |    .1081458    .0676528      1.60    0.110     -.0244513     .2407429
 ia1journal40 |   -.3121299    .1152243     -2.71    0.007     -.5379653    -.0862945
 ia1journal41 |    .0818074    .0448778      1.82    0.068     -.0061515     .1697662
 ia1journal42 |    .0909019     .062758      1.45    0.147     -.0321015     .2139054
 ia1journal43 |   -.0341085    .0569077     -0.60    0.549     -.1456454     .0774285
 ia1journal44 |   -.1349544     .067363     -2.00    0.045     -.2669834    -.0029254
 ia1journal45 |    .0982931    .0572889      1.72    0.086      -.013991     .2105772
 ia1journal46 |   -.1463846    .0582397     -2.51    0.012     -.2605323     -.032237
 ia1journal47 |     .037289     .034172      1.09    0.275      -.029687     .1042649
 ia1journal48 |   -.2526406    .0967391     -2.61    0.009     -.4422457    -.0630355
 ia1journal50 |   -.1359851    .0367206     -3.70    0.000     -.2079562    -.0640139
 ia1journal51 |    .2802631      .06559      4.27    0.000      .1517092     .4088171
 ia1journal52 |    .0353719    .0636117      0.56    0.578     -.0893048     .1600486
 ia1journal53 |      -.0093    .0555007     -0.17    0.867     -.1180793     .0994793
 ia1journal54 |    .1430214     .051793      2.76    0.006       .041509     .2445338
 ia1journal55 |    .2246177    .0708934      3.17    0.002      .0856691     .3635662
 ia1journal56 |    .0957119    .0599283      1.60    0.110     -.0217453     .2131692
 ia1journal57 |   -.1830046    .0757373     -2.42    0.016      -.331447    -.0345622
 ia1journal58 |    .0507445    .0452859      1.12    0.262     -.0380142     .1395032
 ia1journal59 |   -.0385108    .0475159     -0.81    0.418     -.1316402     .0546186
 ia1journal60 |    .2647211    .0627627      4.22    0.000      .1417085     .3877336
 ia1journal61 |   -.0414373    .0620399     -0.67    0.504     -.1630334     .0801587
 ia1journal62 |     .080695    .0456199      1.77    0.077     -.0087184     .1701085
 ia1journal63 |    .0125442    .0317448      0.40    0.693     -.0496744     .0747628
 ia1journal64 |    .0060398    .0496663      0.12    0.903     -.0913044      .103384
 ia1journal65 |   -.0641422    .0470333     -1.36    0.173     -.1563258     .0280414
 ia1journal66 |   -.0404984      .03803     -1.06    0.287     -.1150359     .0340391
 ia1journal67 |   -.0299745    .0419838     -0.71    0.475     -.1122612     .0523123
 ia1journal68 |   -.1126978    .0301157     -3.74    0.000     -.1717235    -.0536721
 ia1journal69 |   -.0985248    .0366455     -2.69    0.007     -.1703486     -.026701
 ia1journal70 |    .0111551    .0387918      0.29    0.774     -.0648755     .0871857
 ia1journal71 |    .0152157    .0545004      0.28    0.780     -.0916031     .1220346
 ia1journal72 |   -.0827669    .0562558     -1.47    0.141     -.1930262     .0274925
 ia1journal73 |   -.2771912    .0592012     -4.68    0.000     -.3932233     -.161159
 ia1journal74 |    .1747184    .0408889      4.27    0.000      .0945776     .2548592
 ia1journal75 |    .2540038    .0497737      5.10    0.000       .156449     .3515585
 ia1journal76 |    .1575327    .0345341      4.56    0.000      .0898472     .2252182
 ia1journal77 |    .0169042     .037476      0.45    0.652     -.0565475     .0903559
 ia1journal78 |    .0548814    .0402695      1.36    0.173     -.0240454     .1338082
 ia1journal79 |    .1381109    .0510226      2.71    0.007      .0381085     .2381133
 ia1journal80 |   -.0093289    .0372114     -0.25    0.802     -.0822618     .0636041
 ia1journal81 |    .2159433     .063156      3.42    0.001      .0921598     .3397267
 ia1journal82 |     .043476    .0622022      0.70    0.485     -.0784381     .1653901
 ia1journal83 |   -.0527322    .0486462     -1.08    0.278     -.1480771     .0426126
 ia1journal84 |    .0314813    .0488225      0.64    0.519      -.064209     .1271715
 ia1journal86 |    .0129912    .0799053      0.16    0.871     -.1436203     .1696028
 ia1journal87 |    .0286691     .063693      0.45    0.653     -.0961668     .1535051
 ia1journal88 |    .0801238    .0642779      1.25    0.213     -.0458585     .2061062
 ia1journal89 |   -.0061762    .0551621     -0.11    0.911     -.1142919     .1019395
 ia1journal90 |   -.0525687    .0316517     -1.66    0.097     -.1146048     .0094675
 ia1journal91 |   -.1544715     .091596     -1.69    0.092     -.3339964     .0250535
 ia1journal92 |    .0614437    .0795608      0.77    0.440     -.0944926       .21738
 ia1journal93 |     .090614    .0371292      2.44    0.015      .0178421     .1633859
 ia1journal94 |   -.2748317    .0876922     -3.13    0.002     -.4467053    -.1029582
 ia1journal95 |    .0918408    .1614796      0.57    0.570     -.2246533      .408335
 ia1journal96 |    .1290041    .0714974      1.80    0.071     -.0111283     .2691365
 ia1journal97 |   -.1864018    .1287872     -1.45    0.148     -.4388201     .0660165
 ia1journal98 |   -.1377136    .0718613     -1.92    0.055     -.2785591     .0031318
 ia1journal99 |   -.1301598    .0748274     -1.74    0.082     -.2768187     .0164991
ia1journal100 |    .0590886    .0738654      0.80    0.424      -.085685     .2038622
  ia2journal2 |    .0070431    .0032463      2.17    0.030      .0006804     .0134057
  ia2journal3 |    .0091014    .0030511      2.98    0.003      .0031213     .0150815
  ia2journal4 |   -.0000109    .0029585     -0.00    0.997     -.0058095     .0057877
  ia2journal5 |   -.0058434     .003646     -1.60    0.109     -.0129894     .0013026
  ia2journal6 |    .0026459    .0031233      0.85    0.397     -.0034756     .0087674
  ia2journal7 |   -.0046989    .0047647     -0.99    0.324     -.0140376     .0046398
  ia2journal8 |    .0025901    .0065894      0.39    0.694     -.0103248      .015505
  ia2journal9 |    .0074437    .0052132      1.43    0.153     -.0027739     .0176614
 ia2journal10 |    .0206129    .0072588      2.84    0.005      .0063858     .0348399
 ia2journal11 |    .0040015    .0034546      1.16    0.247     -.0027693     .0107724
 ia2journal12 |    .0076062     .004027      1.89    0.059     -.0002865      .015499
 ia2journal13 |    .0010262    .0043933      0.23    0.815     -.0075846      .009637
 ia2journal14 |   -.0029722    .0033622     -0.88    0.377      -.009562     .0036176
 ia2journal15 |    .0046621     .002572      1.81    0.070     -.0003789     .0097032
 ia2journal16 |    .0031448    .0054581      0.58    0.565     -.0075529     .0138425
 ia2journal17 |    .0053801    .0062648      0.86    0.390     -.0068988      .017659
 ia2journal18 |    .0274408    .0093599      2.93    0.003      .0090957     .0457859
 ia2journal19 |   -.0152074    .0071881     -2.12    0.034     -.0292959     -.001119
 ia2journal20 |     .031227      .01164      2.68    0.007      .0084131      .054041
 ia2journal21 |   -.0013052    .0045003     -0.29    0.772     -.0101257     .0075152
 ia2journal22 |    -.001146    .0051443     -0.22    0.824     -.0112286     .0089367
 ia2journal23 |   -.0107673    .0050666     -2.13    0.034     -.0206978    -.0008369
 ia2journal24 |   -.0080654    .0063797     -1.26    0.206     -.0205694     .0044386
 ia2journal25 |   -.0056413    .0026303     -2.14    0.032     -.0107966     -.000486
 ia2journal26 |   -.0013834    .0028816     -0.48    0.631     -.0070312     .0042643
 ia2journal27 |   -.0041096    .0032871     -1.25    0.211     -.0105522     .0023329
 ia2journal28 |     .021801    .0051955      4.20    0.000      .0116181     .0319839
 ia2journal29 |   -.0050941    .0094177     -0.54    0.589     -.0235525     .0133642
 ia2journal30 |     .001896    .0054999      0.34    0.730     -.0088835     .0126755
 ia2journal31 |   -.0018142    .0048191     -0.38    0.707     -.0112594      .007631
 ia2journal32 |   -.0049684    .0028234     -1.76    0.078     -.0105022     .0005654
 ia2journal33 |   -.0067118    .0026754     -2.51    0.012     -.0119555    -.0014681
 ia2journal34 |    -.019248    .0043722     -4.40    0.000     -.0278175    -.0106786
 ia2journal35 |   -.0050342    .0040467     -1.24    0.213     -.0129655     .0028972
 ia2journal36 |    .0096946    .0047569      2.04    0.042      .0003713     .0190178
 ia2journal37 |    .0030656    .0056464      0.54    0.587     -.0080011     .0141323
 ia2journal38 |    .0030698    .0066475      0.46    0.644     -.0099591     .0160987
 ia2journal39 |   -.0082568    .0069564     -1.19    0.235     -.0218912     .0053775
 ia2journal40 |    -.004582    .0143331     -0.32    0.749     -.0326744     .0235104
 ia2journal41 |   -.0095065    .0047041     -2.02    0.043     -.0187263    -.0002867
 ia2journal42 |   -.0234838    .0070932     -3.31    0.001     -.0373862    -.0095814
 ia2journal43 |   -.0011381    .0059277     -0.19    0.848     -.0127561       .01048
 ia2journal44 |     .005424    .0073811      0.73    0.462     -.0090427     .0198906
 ia2journal45 |   -.0126674    .0059183     -2.14    0.032     -.0242671    -.0010677
 ia2journal46 |    .0054636     .006208      0.88    0.379     -.0067039     .0176311
 ia2journal47 |   -.0039929    .0034516     -1.16    0.247     -.0107578     .0027721
 ia2journal48 |     .016469    .0104561      1.58    0.115     -.0040246     .0369626
 ia2journal50 |    .0127226    .0036928      3.45    0.001      .0054849     .0199603
 ia2journal51 |   -.0331797    .0066924     -4.96    0.000     -.0462965    -.0200628
 ia2journal52 |   -.0029211    .0065908     -0.44    0.658     -.0158389     .0099966
 ia2journal53 |    .0005591    .0057433      0.10    0.922     -.0106975     .0118156
 ia2journal54 |   -.0076939    .0052367     -1.47    0.142     -.0179576     .0025698
 ia2journal55 |   -.0230186    .0073357     -3.14    0.002     -.0373963    -.0086409
 ia2journal56 |   -.0144814    .0062062     -2.33    0.020     -.0266453    -.0023176
 ia2journal57 |    .0091734    .0081113      1.13    0.258     -.0067245     .0250713
 ia2journal58 |   -.0076673    .0047245     -1.62    0.105     -.0169271     .0015924
 ia2journal59 |    .0040807    .0048099      0.85    0.396     -.0053465     .0135078
 ia2journal60 |   -.0148867    .0062133     -2.40    0.017     -.0270646    -.0027088
 ia2journal61 |   -.0073279    .0067813     -1.08    0.280     -.0206191     .0059632
 ia2journal62 |     -.00774    .0046106     -1.68    0.093     -.0167767     .0012967
 ia2journal63 |   -.0017056    .0031799     -0.54    0.592     -.0079381     .0045268
 ia2journal64 |   -.0038324    .0053451     -0.72    0.473     -.0143086     .0066439
 ia2journal65 |    .0006825    .0049329      0.14    0.890     -.0089857     .0103507
 ia2journal66 |    .0005761    .0038779      0.15    0.882     -.0070244     .0081765
 ia2journal67 |    .0022976    .0042018      0.55    0.585     -.0059378      .010533
 ia2journal68 |    .0149677     .003059      4.89    0.000      .0089721     .0209632
 ia2journal69 |    .0078545    .0037886      2.07    0.038      .0004289     .0152801
 ia2journal70 |   -.0055215    .0040794     -1.35    0.176      -.013517      .002474
 ia2journal71 |    -.006692    .0056897     -1.18    0.240     -.0178435     .0044595
 ia2journal72 |    .0074526     .005895      1.26    0.206     -.0041014     .0190067
 ia2journal73 |    .0252739    .0063284      3.99    0.000      .0128705     .0376772
 ia2journal74 |   -.0111861    .0041662     -2.68    0.007     -.0193516    -.0030206
 ia2journal75 |   -.0242139    .0051067     -4.74    0.000     -.0342229     -.014205
 ia2journal76 |   -.0072005    .0034118     -2.11    0.035     -.0138874    -.0005135
 ia2journal77 |   -.0004765    .0038471     -0.12    0.901     -.0080166     .0070636
 ia2journal78 |   -.0046955    .0041142     -1.14    0.254     -.0127593     .0033682
 ia2journal79 |   -.0136253    .0051833     -2.63    0.009     -.0237843    -.0034663
 ia2journal80 |   -.0004914    .0037975     -0.13    0.897     -.0079343     .0069515
 ia2journal81 |   -.0137754    .0063588     -2.17    0.030     -.0262384    -.0013124
 ia2journal82 |   -.0091683    .0066758     -1.37    0.170     -.0222526     .0039161
 ia2journal83 |    .0063665    .0050434      1.26    0.207     -.0035184     .0162514
 ia2journal84 |   -.0102683    .0050464     -2.03    0.042      -.020159    -.0003777
 ia2journal86 |   -.0040624    .0084471     -0.48    0.631     -.0206184     .0124935
 ia2journal87 |   -.0051293    .0065421     -0.78    0.433     -.0179515     .0076929
 ia2journal88 |   -.0070491    .0065441     -1.08    0.281     -.0198753     .0057771
 ia2journal89 |   -.0026795    .0054792     -0.49    0.625     -.0134185     .0080596
 ia2journal90 |   -.0001915    .0032811     -0.06    0.953     -.0066223     .0062393
 ia2journal91 |    .0058811    .0098857      0.59    0.552     -.0134945     .0252567
 ia2journal92 |   -.0083689    .0084855     -0.99    0.324     -.0250002     .0082623
 ia2journal93 |    -.013038    .0038023     -3.43    0.001     -.0204904    -.0055856
 ia2journal94 |    .0220718    .0090639      2.44    0.015      .0043068     .0398367
 ia2journal95 |   -.0249608    .0184842     -1.35    0.177     -.0611892     .0112676
 ia2journal96 |   -.0092478    .0073058     -1.27    0.206     -.0235669     .0050713
 ia2journal97 |    .0063423    .0144478      0.44    0.661     -.0219748     .0346594
 ia2journal98 |    .0093048    .0074745      1.24    0.213      -.005345     .0239545
 ia2journal99 |   -.0012536     .008189     -0.15    0.878     -.0173038     .0147967
ia2journal100 |   -.0093393    .0078319     -1.19    0.233     -.0246896     .0060109
        d1c95 |   -.0669947     .026029     -2.57    0.010     -.1180106    -.0159787
        d1c00 |   -.0379014    .0266571     -1.42    0.155     -.0901485     .0143456
        d2c95 |    -.008135     .024019     -0.34    0.735     -.0552113     .0389414
        d2c00 |    .0086292    .0237087      0.36    0.716      -.037839     .0550974
--------------+----------------------------------------------------------------
Calculating Robust Standard Errors...
--------------+----------------------------------------------------------------
           cit |        IRR    Std. Err.       z    P>|z|      [95% Con f. Interval]
--------------+----------------------------------------------------------------
cit           |
      cit_lag |    .9996659    .0002015     -1.66    0.097       .999271     1.000061
      ip96c97 |     .341924    .0331108    -11.08    0.000      .2828146     .4133874
      ip96c98 |    .6802604    .0521028     -5.03    0.000      .5854362     .7904436
      ip96c99 |    .8446825    .0499722     -2.85    0.004      .7522039     .9485307
      ip97c98 |    .3608029    .0431682     -8.52    0.000       .285383     .4561543
      ip97c99 |    .6493846     .051917     -5.40    0.000      .5552008     .7595455
      ip98c99 |    .3572165    .0411868     -8.93    0.000      .2849631     .4477901
      ip96c00 |    .9287891    .0272479     -2.52    0.012      .8768905     .9837594
      ip96c01 |    1.015276    .0224053      0.69    0.492      .9722986     1.060153
      ip96c02 |    1.004482    .0204556      0.22    0.826       .965179     1.045385
      ip96c03 |    1.063747    .0225496      2.92    0.004      1.020456     1.108874
      ip96c04 |    1.083742    .0219458      3.97    0.000      1.041571      1.12762
      ip97c00 |    .8031616    .0363965     -4.84    0.000       .734902     .8777614
      ip97c01 |    .8962951    .0289487     -3.39    0.001      .8413153     .9548679
      ip97c02 |    .9537973     .019887     -2.27    0.023      .9156052     .9935825
      ip97c03 |    1.045216    .0198185      2.33    0.020      1.007086     1.084791
      ip97c04 |    1.054005    .0189337      2.93    0.003      1.017542     1.091776
      ip98c00 |    .6225286    .0483735     -6.10    0.000       .534585     .7249397
      ip98c01 |    .8244476    .0446185     -3.57    0.000      .7414752     .9167048
      ip98c02 |    .9182919    .0314752     -2.49    0.013      .8586281     .9821015
      ip98c03 |    1.013345    .0207533      0.65    0.517      .9734743     1.054848
      ip98c04 |     1.07089    .0185403      3.96    0.000      1.035161     1.107852
      ip99c00 |    .3262958    .0357045    -10.24    0.000      .2633115     .4043458
      ip99c01 |    .6509727    .0503138     -5.55    0.000      .5594654     .7574471
      ip99c02 |    .8365717    .0440568     -3.39    0.001       .754529     .9275352
      ip99c03 |     .940298    .0318913     -1.82    0.070      .8798245     1.004928
      ip99c04 |    1.006928    .0226364      0.31    0.759      .9635253     1.052287
      ip00c01 |     .373794    .0370631     -9.92    0.000      .3077744     .4539753
      ip00c02 |    .7018537    .0419547     -5.92    0.000      .6242582     .7890943
      ip00c03 |    .9280127    .0325034     -2.13    0.033      .8664445     .9939558
      ip00c04 |    1.018413    .0222969      0.83    0.405      .9756367     1.063066
      ip01c02 |    .3897207    .0346637    -10.59    0.000      .3273733      .463942
      ip01c03 |    .7406293    .0396708     -5.61    0.000      .6668182     .8226105
      ip01c04 |    .9470788     .026369     -1.95    0.051      .8967814     1.000197
      ip02c03 |     .470212    .0333954    -10.62    0.000      .4091096     .5404403
      ip02c04 |    .8313348    .0284214     -5.40    0.000      .7774553     .8889484
      ip03c04 |    .5994783    .0232098    -13.22    0.000      .5556711     .6467391
  ia1journal2 |    .8547615    .0168262     -7.97    0.000      .8224109     .8883847
  ia1journal3 |    .9424717    .0232374     -2.40    0.016      .8980103     .9891345
  ia1journal4 |    1.023592    .0190093      1.26    0.209      .9870046     1.061536
  ia1journal5 |    1.071017     .030326      2.42    0.015      1.013198     1.132135
  ia1journal6 |    .9965842    .0233622     -0.15    0.884      .9518312     1.043441
  ia1journal7 |    1.014554    .0318984      0.46    0.646      .9539213      1.07904
  ia1journal8 |    .9883621    .0357337     -0.32    0.746      .9207493      1.06094
  ia1journal9 |    .9432616    .0306999     -1.79    0.073      .8849699     1.005393
 ia1journal10 |    .7191801    .0279253     -8.49    0.000      .6664785     .7760491
 ia1journal11 |    .9276911    .0242615     -2.87    0.004      .8813375     .9764826
 ia1journal12 |    .9604554    .0295625     -1.31    0.190       .904227      1.02018
 ia1journal13 |    1.004578    .0313269      0.15    0.884       .945017     1.067893
 ia1journal14 |     .993802    .0227576     -0.27    0.786      .9501841     1.039422
 ia1journal15 |    .9791772    .0119766     -1.72    0.085      .9559826     1.002935
 ia1journal16 |    .9868727     .031716     -0.41    0.681      .9266279     1.051034
 ia1journal17 |    .9506901    .0331153     -1.45    0.147      .8879514     1.017862
 ia1journal18 |    .6265725    .0229411    -12.77    0.000      .5831842     .6731888
 ia1journal19 |    1.087253    .0383625      2.37    0.018      1.014604     1.165103
 ia1journal20 |    .6825626    .0242906    -10.73    0.000      .6365764      .731871
 ia1journal21 |    1.010431    .0305582      0.34    0.732      .9522787     1.072135
 ia1journal22 |    1.000443    .0321123      0.01    0.989      .9394431     1.065404
 ia1journal23 |    1.116397    .0344909      3.56    0.000      1.050802     1.186087
 ia1journal24 |    1.029487     .036367      0.82    0.411      .9606202      1.10329
 ia1journal25 |    1.123019    .0114944     11.34    0.000      1.100715     1.145775
 ia1journal26 |    1.057739    .0184016      3.23    0.001      1.022281     1.094427
 ia1journal27 |    1.115353    .0262858      4.63    0.000      1.065006     1.168081
 ia1journal28 |    .8438356    .0286431     -5.00    0.000      .7895228     .9018846
 ia1journal29 |    .9093587    .0318899     -2.71    0.007      .8489552     .9740599
 ia1journal30 |    .9992459    .0334586     -0.02    0.982      .9357737     1.067023
 ia1journal31 |    1.049957    .0359506      1.42    0.155      .9818072     1.122837
 ia1journal32 |    1.107818    .0180477      6.29    0.000      1.073004     1.143761
 ia1journal33 |    1.145423    .0166222      9.36    0.000      1.113303      1.17847
 ia1journal34 |    1.228453    .0350501      7.21    0.000      1.161642     1.299107
 ia1journal35 |    1.065035    .0278293      2.41    0.016      1.011864     1.121001
 ia1journal36 |    .9159745     .027184     -2.96    0.003      .8642148     .9708342
 ia1journal37 |    .8774715    .0289908     -3.96    0.000      .8224513     .9361725
 ia1journal38 |      .89164    .0303549     -3.37    0.001      .8340869     .9531644
 ia1journal39 |     1.11421    .0388829      3.10    0.002      1.040549     1.193086
 ia1journal40 |    .7318864    .0269219     -8.49    0.000      .6809776     .7866011
 ia1journal41 |    1.085247    .0263754      3.37    0.001      1.034764     1.138193
 ia1journal42 |    1.095162    .0375428      2.65    0.008      1.023997     1.171272
 ia1journal43 |    .9664667    .0337674     -0.98    0.329      .9024991     1.034968
 ia1journal44 |    .8737557    .0303944     -3.88    0.000      .8161692     .9354054
 ia1journal45 |    1.103286     .035988      3.01    0.003      1.034958     1.176125
 ia1journal46 |    .8638254    .0319367     -3.96    0.000      .8034447     .9287437
 ia1journal47 |    1.037993    .0248652      1.56    0.120      .9903843      1.08789
 ia1journal48 |     .776747    .0285619     -6.87    0.000      .7227363      .834794
 ia1journal50 |    .8728556    .0251478     -4.72    0.000      .8249327     .9235626
 ia1journal51 |    1.323478    .0416118      8.91    0.000      1.244382     1.407601
 ia1journal52 |    1.036005    .0356507      1.03    0.304      .9684352     1.108289
 ia1journal53 |    .9907431    .0332605     -0.28    0.782      .9276521     1.058125
 ia1journal54 |    1.153754     .037514      4.40    0.000      1.082522     1.229674
 ia1journal55 |    1.251844    .0424916      6.62    0.000      1.171272     1.337959
 ia1journal56 |    1.100442     .036576      2.88    0.004       1.03104     1.174516
 ia1journal57 |    .8327643    .0307749     -4.95    0.000      .7745791     .8953202
 ia1journal58 |    1.052054    .0330715      1.61    0.106      .9891914     1.118912
 ia1journal59 |    .9622213    .0312094     -1.19    0.235      .9029557     1.025377
 ia1journal60 |    1.303067    .0438854      7.86    0.000      1.219831     1.391984
 ia1journal61 |    .9594094    .0327374     -1.21    0.225      .8973439     1.025768
 ia1journal62 |     1.08404    .0335854      2.60    0.009      1.020173     1.151906
 ia1journal63 |    1.012623    .0228477      0.56    0.578      .9688182     1.058409
 ia1journal64 |    1.006058    .0317663      0.19    0.848      .9456846     1.070286
 ia1journal65 |    .9378716    .0289567     -2.08    0.038      .8828006     .9963781
 ia1journal66 |    .9603107     .026994     -1.44    0.150      .9088345     1.014703
 ia1journal67 |    .9704703    .0291387     -1.00    0.318      .9150074     1.029295
 ia1journal68 |    .8934206    .0213229     -4.72    0.000      .8525908     .9362056
 ia1journal69 |    .9061732    .0248061     -3.60    0.000      .8588354     .9561202
 ia1journal70 |    1.011218     .027073      0.42    0.677      .9595235     1.065697
 ia1journal71 |    1.015332    .0326288      0.47    0.636      .9533533      1.08134
 ia1journal72 |    .9205657    .0316963     -2.40    0.016       .860492     .9848334
 ia1journal73 |    .7579096    .0296084     -7.10    0.000      .7020442     .8182205
 ia1journal74 |    1.190911    .0324571      6.41    0.000      1.128965     1.256255
 ia1journal75 |    1.289177    .0418159      7.83    0.000       1.20977     1.373796
 ia1journal76 |    1.170619     .031473      5.86    0.000       1.11053     1.233959
 ia1journal77 |    1.017048    .0272247      0.63    0.528       .965064     1.071832
 ia1journal78 |    1.056415    .0305378      1.90    0.058      .9982262     1.117996
 ia1journal79 |    1.148103    .0355066      4.47    0.000      1.080578     1.219847
 ia1journal80 |    .9907145     .026671     -0.35    0.729      .9397955     1.044392
 ia1journal81 |    1.241032    .0415014      6.46    0.000      1.162299     1.325098
 ia1journal82 |    1.044435    .0354841      1.28    0.201      .9771523      1.11635
 ia1journal83 |     .948634    .0309366     -1.62    0.106      .8898965     1.011248
 ia1journal84 |    1.031982    .0302447      1.07    0.283      .9743739     1.092996
 ia1journal86 |    1.013076    .0362452      0.36    0.717      .9444702     1.086665
 ia1journal87 |    1.029084      .03538      0.83    0.404      .9620253     1.100817
 ia1journal88 |    1.083421    .0370165      2.35    0.019      1.013246     1.158457
 ia1journal89 |    .9938429    .0329396     -0.19    0.852      .9313347     1.060546
 ia1journal90 |    .9487892    .0212015     -2.35    0.019      .9081318     .9912668
 ia1journal91 |     .856868    .0296694     -4.46    0.000      .8006463     .9170375
 ia1journal92 |    1.063371    .0385008      1.70    0.090      .9905256     1.141573
 ia1journal93 |    1.094846    .0276236      3.59    0.000      1.042022     1.150349
 ia1journal94 |       .7597     .032925     -6.34    0.000      .6978329     .8270519
 ia1journal95 |     1.09619    .0391831      2.57    0.010      1.022021     1.175742
 ia1journal96 |    1.137695    .0398952      3.68    0.000      1.062128     1.218638
 ia1journal97 |    .8299401    .0331296     -4.67    0.000      .7674824     .8974805
 ia1journal98 |    .8713482    .0334324     -3.59    0.000      .8082252     .9394012
 ia1journal99 |    .8779551    .0309486     -3.69    0.000       .819345     .9407578
ia1journal100 |    1.060869    .0399827      1.57    0.117       .985329     1.142201
  ia2journal2 |    1.007068    .0011043      6.42    0.000      1.004906     1.009235
  ia2journal3 |    1.009143    .0019193      4.79    0.000      1.005388     1.012912
  ia2journal4 |    .9999891    .0014665     -0.01    0.994       .997119     1.002867
  ia2journal5 |    .9941736    .0022088     -2.63    0.009      .9898538     .9985123
  ia2journal6 |    1.002649    .0017972      1.48    0.140      .9991331     1.006178
  ia2journal7 |    .9953121    .0021818     -2.14    0.032       .991045     .9995976
  ia2journal8 |    1.002593     .002668      0.97    0.330       .997378     1.007836
  ia2journal9 |    1.007472    .0022793      3.29    0.001      1.003014     1.011949
 ia2journal10 |    1.020827    .0031127      6.76    0.000      1.014744     1.026946
 ia2journal11 |     1.00401    .0019638      2.05    0.041      1.000168     1.007866
 ia2journal12 |    1.007635    .0022606      3.39    0.001      1.003214     1.012076
 ia2journal13 |    1.001027    .0022511      0.46    0.648      .9966243     1.005449
 ia2journal14 |    .9970322    .0015276     -1.94    0.052      .9940427     1.000031
 ia2journal15 |    1.004673    .0010311      4.54    0.000      1.002654     1.006696
 ia2journal16 |     1.00315    .0022499      1.40    0.161      .9987497     1.007569
 ia2journal17 |    1.005395    .0024525      2.21    0.027      1.000599     1.010213
 ia2journal18 |    1.027821    .0028235      9.99    0.000      1.022302      1.03337
 ia2journal19 |    .9849076    .0025368     -5.90    0.000      .9799482     .9898922
 ia2journal20 |     1.03172    .0025702     12.54    0.000      1.026695     1.036769
 ia2journal21 |    .9986956     .002112     -0.62    0.537      .9945647     1.002844
 ia2journal22 |    .9988547    .0022538     -0.51    0.612       .994447     1.003282
 ia2journal23 |    .9892904    .0022408     -4.75    0.000      .9849083      .993692
 ia2journal24 |     .991967    .0025484     -3.14    0.002      .9869848     .9969744
 ia2journal25 |    .9943746    .0008482     -6.61    0.000      .9927135     .9960384
 ia2journal26 |    .9986175    .0013464     -1.03    0.305      .9959821      1.00126
 ia2journal27 |    .9958988     .001871     -2.19    0.029      .9922385     .9995726
 ia2journal28 |     1.02204    .0025018      8.91    0.000      1.017149     1.026956
 ia2journal29 |    .9949188    .0024269     -2.09    0.037      .9901736     .9996868
 ia2journal30 |    1.001898    .0024547      0.77    0.439      .9970983      1.00672
 ia2journal31 |    .9981875     .002642     -0.69    0.493      .9930227     1.003379
 ia2journal32 |    .9950439    .0013508     -3.66    0.000      .9923998      .997695
 ia2journal33 |    .9933107    .0013669     -4.88    0.000      .9906352     .9959934
 ia2journal34 |     .980936    .0019556     -9.65    0.000      .9771106     .9847765
 ia2journal35 |    .9949785    .0018179     -2.76    0.006      .9914219     .9985478
 ia2journal36 |    1.009742    .0020718      4.72    0.000      1.005689     1.013811
 ia2journal37 |     1.00307     .002286      1.35    0.179      .9985999     1.007561
 ia2journal38 |    1.003075    .0023309      1.32    0.186      .9985164     1.007653
 ia2journal39 |    .9917772    .0024649     -3.32    0.001      .9869579       .99662
 ia2journal40 |    .9954285    .0025953     -1.76    0.079      .9903548     1.000528
 ia2journal41 |    .9905385    .0015589     -6.04    0.000      .9874879     .9935986
 ia2journal42 |    .9767898     .002302     -9.96    0.000      .9722883     .9813121
 ia2journal43 |    .9988626    .0023566     -0.48    0.630      .9942543     1.003492
 ia2journal44 |    1.005439    .0024158      2.26    0.024      1.000715     1.010185
 ia2journal45 |    .9874125    .0022325     -5.60    0.000      .9830465     .9917979
 ia2journal46 |    1.005479     .002854      1.92    0.054      .9999003     1.011088
 ia2journal47 |    .9960151    .0016645     -2.39    0.017       .992758     .9992829
 ia2journal48 |    1.016605    .0026256      6.38    0.000      1.011472     1.021764
 ia2journal50 |    1.012804    .0020613      6.25    0.000      1.008772     1.016852
 ia2journal51 |    .9673648    .0020298    -15.81    0.000      .9633946     .9713512
 ia2journal52 |    .9970831    .0024165     -1.21    0.228      .9923581     1.001831
 ia2journal53 |    1.000559    .0023497      0.24    0.812      .9959644     1.005175
 ia2journal54 |    .9923356    .0022771     -3.35    0.001      .9878827     .9968086
 ia2journal55 |    .9772443    .0022974     -9.79    0.000      .9727518     .9817575
 ia2journal56 |    .9856229    .0022573     -6.32    0.000      .9812085     .9900572
 ia2journal57 |    1.009216    .0024972      3.71    0.000      1.004333     1.014122
 ia2journal58 |     .992362    .0021894     -3.48    0.001        .98808     .9966625
 ia2journal59 |    1.004089    .0022961      1.78    0.074      .9995989     1.008599
 ia2journal60 |    .9852236    .0023525     -6.23    0.000      .9806236     .9898451
 ia2journal61 |    .9926989     .002307     -3.15    0.002      .9881876     .9972307
 ia2journal62 |    .9922899    .0021602     -3.56    0.000      .9880649     .9965329
 ia2journal63 |    .9982958    .0016172     -1.05    0.292      .9951312     1.001471
 ia2journal64 |    .9961749     .002214     -1.72    0.085       .991845     1.000524
 ia2journal65 |    1.000683    .0021205      0.32    0.747      .9965353     1.004847
 ia2journal66 |    1.000576    .0019183      0.30    0.764      .9968234     1.004343
 ia2journal67 |      1.0023    .0021077      1.09    0.275      .9981777      1.00644
 ia2journal68 |     1.01508    .0018375      8.27    0.000      1.011485     1.018688
 ia2journal69 |    1.007885    .0018981      4.17    0.000      1.004172     1.011613
 ia2journal70 |    .9944937    .0017654     -3.11    0.002      .9910397     .9979598
 ia2journal71 |    .9933303    .0021727     -3.06    0.002      .9890811     .9975978
 ia2journal72 |     1.00748    .0024676      3.04    0.002      1.002656     1.012329
 ia2journal73 |    1.025596    .0031133      8.33    0.000      1.019512     1.031716
 ia2journal74 |    .9888762    .0018919     -5.85    0.000      .9851751     .9925913
 ia2journal75 |    .9760769    .0023258    -10.16    0.000       .971529     .9806461
 ia2journal76 |    .9928254    .0021578     -3.31    0.001      .9886052     .9970635
 ia2journal77 |    .9995236     .001875     -0.25    0.799      .9958554     1.003205
 ia2journal78 |    .9953155    .0020326     -2.30    0.021      .9913396     .9993073
 ia2journal79 |    .9864671    .0021186     -6.34    0.000      .9823235     .9906282
 ia2journal80 |    .9995087    .0018356     -0.27    0.789      .9959174     1.003113
 ia2journal81 |     .986319    .0023439     -5.80    0.000      .9817357     .9909237
 ia2journal82 |    .9908736    .0023182     -3.92    0.000      .9863405     .9954276
 ia2journal83 |    1.006387    .0023077      2.78    0.005      1.001874      1.01092
 ia2journal84 |    .9897842    .0019079     -5.33    0.000      .9860518     .9935308
 ia2journal86 |    .9959458    .0024905     -1.62    0.104      .9910765     1.000839
 ia2journal87 |    .9948838    .0023175     -2.20    0.028      .9903519     .9994364
 ia2journal88 |    .9929757    .0023748     -2.95    0.003      .9883319     .9976412
 ia2journal89 |    .9973241    .0022173     -1.21    0.228      .9929877     1.001679
 ia2journal90 |    .9998085    .0014204     -0.13    0.893      .9970286     1.002596
 ia2journal91 |    1.005898    .0024126      2.45    0.014      1.001181     1.010638
 ia2journal92 |     .991666    .0024739     -3.35    0.001      .9868291     .9965266
 ia2journal93 |    .9870466    .0016936     -7.60    0.000      .9837329     .9903715
 ia2journal94 |    1.022317    .0033842      6.67    0.000      1.015706     1.028972
 ia2journal95 |    .9753482    .0024056    -10.12    0.000      .9706447     .9800745
 ia2journal96 |    .9907948    .0024326     -3.77    0.000      .9860385     .9955741
 ia2journal97 |    1.006362     .002802      2.28    0.023      1.000886     1.011869
 ia2journal98 |    1.009348    .0029458      3.19    0.001      1.003591     1.015138
 ia2journal99 |    .9987472    .0024305     -0.52    0.606      .9939949     1.003522
ia2journal100 |    .9907041     .002784     -3.32    0.001      .9852627     .9961756
        d1c95 |    .9352002    .0472123     -1.33    0.184      .8470964     1.032467
        d1c00 |    .9628078     .036204     -1.01    0.313       .894401     1.036447
        d2c95 |     .991898    .0447664     -0.18    0.857      .9079262     1.083636
        d2c00 |    1.008667    .0323681      0.27    0.788      .9471801     1.074144
--------------+----------------------------------------------------------------
Wald chi2(235) =  2.9e+16                                Prob > chi2 =   0.0000

. erase temp_data.dta;

.
end of do-file

. exit, clear