Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 1,309 2.851031 .9984511 1 5 a_age2 | 1,309 3.860199 1.437648 1 6 a_age3 | 1,309 7.522536 2.684561 1 13 a_age4 | 1,309 4.326967 1.983891 1 8 a_age5 | 1,309 4.637128 2.473813 1 10 -------------+--------------------------------------------------------- a_age6 | 1,309 4.647823 2.460179 1 10 a_age7 | 1,309 6.569137 2.593363 1 12 a_age8 | 1,309 3.244461 1.869965 1 7 veh_no | 1,309 1.111536 .7469181 0 5 per_no | 1,309 1.488923 .9590584 1 7 -------------+--------------------------------------------------------- st_case | 1,309 430263.5 148.8346 430001 430529 year | 1,309 1992 0 1992 1992 a_ptype | 1,309 1.648587 .811024 1 5 a_rest | 1,309 1.731092 .5212199 1 3 a_alctes | 1,309 2.18029 .8793639 1 5 -------------+--------------------------------------------------------- a_hisp | 1,309 0 0 0 0 a_rcat | 1,309 0 0 0 0 a_hrace | 1,309 0 0 0 0 a_eject | 1,309 1.106188 .4121992 1 3 a_perinj | 1,309 3.818946 2.480519 1 6 -------------+--------------------------------------------------------- a_loc | 1,309 1.350649 .7542195 1 3 by Jean Roth , jroth@nber.org , 18 Apr 2016