Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 1,416 2.866525 .9881894 1 5 a_age2 | 1,416 3.877119 1.436185 1 6 a_age3 | 1,416 7.598164 2.631201 1 13 a_age4 | 1,416 4.358051 1.983941 1 8 a_age5 | 1,416 4.681497 2.478937 1 10 -------------+--------------------------------------------------------- a_age6 | 1,416 4.699859 2.455173 1 10 a_age7 | 1,416 6.635593 2.560362 1 12 a_age8 | 1,416 3.288842 1.884072 1 7 veh_no | 1,416 1.15113 .7451412 0 4 per_no | 1,416 1.528955 1.11235 1 13 -------------+--------------------------------------------------------- st_case | 1,416 430279 159.3805 430001 430553 year | 1,416 1996 0 1996 1996 a_ptype | 1,416 1.642655 .8015813 1 5 a_rest | 1,416 1.706921 .523222 1 3 a_alctes | 1,416 2.071328 .9092364 1 4 -------------+--------------------------------------------------------- a_hisp | 1,416 0 0 0 0 a_rcat | 1,416 0 0 0 0 a_hrace | 1,416 0 0 0 0 a_eject | 1,416 1.094633 .3900885 1 3 a_perinj | 1,416 3.877825 2.472158 1 6 -------------+--------------------------------------------------------- a_loc | 1,416 1.346751 .7569443 1 3 by Jean Roth , jroth@nber.org , 18 Apr 2016