Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 1,014 2.965483 .9414194 1 5 a_age2 | 1,014 4.029586 1.324502 1 6 a_age3 | 1,014 7.844181 2.514986 1 13 a_age4 | 1,014 4.545365 1.891795 1 8 a_age5 | 1,014 4.89645 2.408468 1 10 -------------+--------------------------------------------------------- a_age6 | 1,014 4.906312 2.394486 1 10 a_age7 | 1,014 6.864892 2.469256 1 12 a_age8 | 1,014 3.43787 1.849091 1 7 veh_no | 1,014 1.139053 .7174276 0 4 per_no | 1,014 1.486193 1.182843 1 14 -------------+--------------------------------------------------------- st_case | 1,014 430223.3 127.2673 430001 430437 year | 1,014 2005 0 2005 2005 a_ptype | 1,014 1.587771 .8094264 1 5 a_rest | 1,014 1.561144 .5529327 1 3 a_alctes | 1,014 2.059172 .9173386 1 4 -------------+--------------------------------------------------------- a_hisp | 1,014 .9171598 1.02054 0 3 a_rcat | 1,014 .561144 1.063488 0 8 a_hrace | 1,014 .5769231 1.175389 0 9 a_eject | 1,014 1.086785 .3722387 1 3 a_perinj | 1,014 3.746548 2.489041 1 6 -------------+--------------------------------------------------------- a_loc | 1,014 1.303748 .7126316 1 3 by Jean Roth , jroth@nber.org , 18 Apr 2016