Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 1,374 2.86099 .9724722 1 5 a_age2 | 1,374 3.868268 1.402619 1 6 a_age3 | 1,374 7.571325 2.616897 1 13 a_age4 | 1,374 4.328967 1.963117 1 8 a_age5 | 1,374 4.64556 2.476751 1 10 -------------+--------------------------------------------------------- a_age6 | 1,374 4.652111 2.468403 1 10 a_age7 | 1,374 6.600437 2.557658 1 12 a_age8 | 1,374 3.238719 1.884444 1 7 veh_no | 1,374 1.129549 .7093899 0 4 per_no | 1,374 1.5 .9524377 1 9 -------------+--------------------------------------------------------- st_case | 1,374 430270.3 157.1528 430001 430548 year | 1,374 1995 0 1995 1995 a_ptype | 1,374 1.611354 .7692482 1 5 a_rest | 1,374 1.694323 .5313313 1 3 a_alctes | 1,374 2.204512 .8891726 1 4 -------------+--------------------------------------------------------- a_hisp | 1,374 0 0 0 0 a_rcat | 1,374 0 0 0 0 a_hrace | 1,374 0 0 0 0 a_eject | 1,374 1.09607 .3960096 1 3 a_perinj | 1,374 3.834789 2.478384 1 6 -------------+--------------------------------------------------------- a_loc | 1,374 1.30786 .7195001 1 3 by Jean Roth , jroth@nber.org , 18 Apr 2016