Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 1,437 2.725818 1.009003 1 5 a_age2 | 1,437 3.7119 1.50827 1 6 a_age3 | 1,437 7.18302 2.729299 1 13 a_age4 | 1,437 4.101601 1.993926 1 8 a_age5 | 1,437 4.35769 2.429815 1 10 -------------+--------------------------------------------------------- a_age6 | 1,437 4.367432 2.418302 1 10 a_age7 | 1,437 6.250522 2.605946 1 12 a_age8 | 1,437 3.044537 1.812051 1 7 veh_no | 1,437 1.08977 .7300836 0 5 per_no | 1,437 1.773138 1.500706 1 15 -------------+--------------------------------------------------------- st_case | 1,437 430296 179.4754 430001 430600 year | 1,437 1985 0 1985 1985 a_ptype | 1,437 1.702853 .8013387 1 5 a_rest | 1,437 1.990953 .2728198 1 3 a_alctes | 1,437 2.427975 .7809516 1 5 -------------+--------------------------------------------------------- a_hisp | 1,437 0 0 0 0 a_rcat | 1,437 0 0 0 0 a_hrace | 1,437 0 0 0 0 a_eject | 1,437 1.013918 .117191 1 2 a_perinj | 1,437 3.912317 2.466623 1 6 -------------+--------------------------------------------------------- a_loc | 1,437 1.35769 .7775343 1 4 by Jean Roth , jroth@nber.org , 18 Apr 2016