Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 1,188 2.756734 .9470818 1 5 a_age2 | 1,188 3.772727 1.453183 1 6 a_age3 | 1,188 7.31229 2.518531 1 13 a_age4 | 1,188 4.175926 1.933658 1 8 a_age5 | 1,188 4.414983 2.332224 1 10 -------------+--------------------------------------------------------- a_age6 | 1,188 4.434343 2.307798 1 10 a_age7 | 1,188 6.358586 2.431755 1 12 a_age8 | 1,188 3.094276 1.776814 1 7 veh_no | 1,188 1.091751 .7127431 0 5 per_no | 1,188 1.538721 .9822429 1 7 -------------+--------------------------------------------------------- st_case | 1,188 430235.1 132.8238 430001 430474 year | 1,188 1991 0 1991 1991 a_ptype | 1,188 1.662458 .803135 1 5 a_rest | 1,188 1.695286 .4974184 1 3 a_alctes | 1,188 2.074074 .8981313 1 4 -------------+--------------------------------------------------------- a_hisp | 1,188 0 0 0 0 a_rcat | 1,188 0 0 0 0 a_hrace | 1,188 0 0 0 0 a_eject | 1,188 1.039562 .261453 1 3 a_perinj | 1,188 3.916667 2.466071 1 6 -------------+--------------------------------------------------------- a_loc | 1,188 1.344276 .7514048 1 3 by Jean Roth , jroth@nber.org , 18 Apr 2016