Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 897 2.936455 .9770685 1 5 a_age2 | 897 4.022297 1.408502 1 6 a_age3 | 897 7.846154 2.652654 1 13 a_age4 | 897 4.580825 1.977663 1 8 a_age5 | 897 4.934225 2.479181 1 10 -------------+--------------------------------------------------------- a_age6 | 897 4.946488 2.462086 1 10 a_age7 | 897 6.878484 2.584672 1 12 a_age8 | 897 3.455964 1.870981 1 7 veh_no | 897 1.170569 .8391262 0 5 per_no | 897 1.598662 1.784581 1 19 -------------+--------------------------------------------------------- st_case | 897 430190.9 111.2634 430001 430385 year | 897 2008 0 2008 2008 a_ptype | 897 1.588629 .8218582 1 5 a_rest | 897 1.548495 .5571576 1 3 a_alctes | 897 1.898551 .9147649 1 4 -------------+--------------------------------------------------------- a_hisp | 897 .90301 .9958406 0 2 a_rcat | 897 .4749164 .5445403 0 2 a_hrace | 897 .451505 .4979203 0 1 a_eject | 897 1.082497 .3718547 1 3 a_perinj | 897 3.742475 2.489602 1 6 -------------+--------------------------------------------------------- a_loc | 897 1.344482 .7548616 1 3 by Jean Roth , jroth@nber.org , 18 Apr 2016