Summary statistics for natl1972 dataset : by Jean Roth , jroth@nber.org , 3 Jan 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- datayear | 1,749,402 2 0 2 2 shipnum | 0 reparea | 0 rectype | 1,749,402 1.197085 .3977972 1 2 restatus | 1,749,402 1.227645 .4914059 1 4 -------------+--------------------------------------------------------- stateres | 0 cntyres | 0 cityres | 0 citrspop | 0 smsares | 0 -------------+--------------------------------------------------------- metrores | 0 divres | 1,749,402 4.717446 2.425877 0 9 stsubres | 1,749,402 50.72015 24.66778 0 95 statenat | 0 cntynat | 0 -------------+--------------------------------------------------------- divocc | 1,749,402 4.73495 2.417994 1 9 stsubocc | 1,749,402 50.90013 24.5758 11 95 csex | 1,749,402 1.48754 .4998449 1 2 birattnd | 1,749,402 1.016182 .1843603 1 4 frace | 1,749,402 1.861993 2.275102 0 9 -------------+--------------------------------------------------------- mrace | 1,749,402 1.244456 .7428339 0 9 crace | 1,749,402 1.24679 .7161925 0 8 crace3 | 1,749,402 1.347874 .7441424 1 3 dmage | 1,749,402 24.44084 5.497772 10 49 mage36 | 1,749,402 11.44162 5.4962 1 36 -------------+--------------------------------------------------------- mage15 | 1,749,402 11.54905 3.496797 1 17 mage12 | 1,749,402 8.221712 1.653047 1 13 mage8 | 1,749,402 3.485713 1.137109 1 8 mage7 | 1,749,402 3.485011 1.13463 1 7 mage6 | 1,749,402 2.488796 1.127983 1 6 -------------+--------------------------------------------------------- nlbnl | 1,749,402 4.256972 15.46653 0 99 nlbnd | 1,749,402 4.750594 18.26957 0 99 nlbd | 1,749,402 4.784777 18.17649 0 99 dtotord | 1,749,402 5.139791 16.14939 1 99 totord9 | 1,749,402 2.545499 1.950484 1 9 -------------+--------------------------------------------------------- dlivord | 1,749,402 4.959568 16.05959 1 99 livord9 | 1,749,402 2.409809 1.86288 1 9 livord8 | 1,749,402 2.355526 1.696983 1 8 livord7 | 1,749,402 2.311799 1.568206 1 7 livord6 | 1,749,402 2.238742 1.389956 1 6 -------------+--------------------------------------------------------- livord3 | 1,749,402 1.632305 .5372251 1 3 dfage | 1,749,402 34.81619 22.29105 10 99 fage11 | 1,749,402 4.8201 2.4183 1 11 dbirwt | 1,749,402 3308.348 683.3221 227 9999 birwt12 | 1,749,402 7.093092 1.2367 1 12 -------------+--------------------------------------------------------- birwt3 | 1,749,402 1.926188 .2713576 1 3 dplural | 1,749,402 1.018721 .1377747 1 5 plural3 | 1,749,402 1.018708 .1375336 1 3 plural2 | 1,749,402 1.018429 .1344953 1 2 birmon | 1,749,402 6.540962 3.452898 1 12 -------------+--------------------------------------------------------- birday | 1,749,402 15.77741 8.824148 1 99 lmpmon | 1,749,402 29.83113 37.39019 1 99 lmpday | 1,749,402 45.61251 38.37757 1 99 lmpyr | 0 dgestat | 1,749,402 38.96908 30.56801 0 99 -------------+--------------------------------------------------------- gestat10 | 1,749,402 5.584422 3.532404 0 10 gestat3 | 1,749,402 1.606974 1.018818 0 3 dmeduc | 1,749,402 36.68072 35.88703 0 99 meduc14 | 1,749,402 5.562775 4.188717 0 14 meduc6 | 1,749,402 2.097582 1.674683 0 6 -------------+--------------------------------------------------------- dfeduc | 1,749,402 43.53201 38.2821 0 99 feduc14 | 1,749,402 6.32744 4.918845 0 14 dlegit | 1,749,402 3.229865 3.182343 1 9 legit3 | 1,749,402 .7868266 .5881231 0 2 monprec | 0 -------------+--------------------------------------------------------- mpre10 | 1,749,402 2.236983 2.35224 0 10 mpre6 | 1,749,402 1.795699 1.424878 0 6 llbmon | 1,749,402 51.30276 38.12958 1 99 llbyr | 1,749,402 77.02554 9.0436 31 99 disllb | 1,749,402 507.5824 396.4896 0 999 -------------+--------------------------------------------------------- isllb17 | 1,749,402 5.294209 6.689791 0 21 isllb10 | 1,749,402 2.721397 3.35166 0 10 isllb8 | 1,749,402 2.208898 2.680727 0 8 lfdmon | 1,749,402 76.6612 18.28296 1 99 lfdyr | 1,749,402 79.51693 6.475859 0 99 -------------+--------------------------------------------------------- dlfd | 1,749,402 772.36 189.5527 0 999 dterm | 1,749,402 518.9658 401.9286 0 999 term9 | 1,749,402 2.737862 3.234229 0 9 outcome | 1,749,402 .5954635 .7518291 0 3 mplbir | 1,749,402 89.4504 25.23174 1 99 -------------+--------------------------------------------------------- nprevis | 1,749,402 46.52864 39.59245 0 99 legitstrflg | 1,749,402 .6938605 .4608885 0 1 educstrflg | 1,749,402 .6943984 .4606619 0 1 lmprflg | 1,749,402 .7537033 .4308535 0 1 monprerflg | 1,749,402 .8315613 .3742555 0 1 -------------+--------------------------------------------------------- llbrflg | 1,749,402 .7547288 .430248 0 1 lfdrflg | 1,749,402 .7325463 .4426311 0 1 legitsmsar~g | 1,749,402 .4131789 .4924045 0 1 educsmsarflg | 1,749,402 .4233412 .4940886 0 1 congenrflg | 1,749,402 .9071454 .2902286 0 1 -------------+--------------------------------------------------------- nprevisrflg | 1,749,402 .5664244 .4955683 0 1 legitstoflg | 1,749,402 .6977476 .4592342 0 1 educstoflg | 1,749,402 .694012 .4608248 0 1 lmpoflg | 1,749,402 .7549465 .430119 0 1 monpreoflg | 1,749,402 .8347915 .3713687 0 1 -------------+--------------------------------------------------------- llboflg | 1,749,402 .7552381 .4299461 0 1 lfdoflg | 1,749,402 .7326109 .4425972 0 1 congenflg | 1,749,402 .9100464 .2861153 0 1 nprevisoflg | 1,749,402 .5683176 .4953109 0 1 recwt | 1,749,402 1.867058 .3395121 1 2 -------------+--------------------------------------------------------- nprev28 | 1,749,402 6.674429 7.159833 0 28 by Jean Roth , jroth@nber.org , 3 Jan 2016