Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 1,391 2.765636 .9926338 1 5 a_age2 | 1,391 3.742631 1.467603 1 6 a_age3 | 1,391 7.253774 2.684008 1 13 a_age4 | 1,391 4.134436 1.959272 1 8 a_age5 | 1,391 4.406183 2.416595 1 10 -------------+--------------------------------------------------------- a_age6 | 1,391 4.416966 2.403558 1 10 a_age7 | 1,391 6.314881 2.570178 1 12 a_age8 | 1,391 3.070453 1.806283 1 7 veh_no | 1,391 1.079799 .7346229 0 5 per_no | 1,391 1.688713 1.230959 1 8 -------------+--------------------------------------------------------- st_case | 1,391 430245.5 147.6019 430001 430508 year | 1,391 1984 0 1984 1984 a_ptype | 1,391 1.736161 .853335 1 5 a_rest | 1,391 1.969087 .3259416 1 3 a_alctes | 1,391 2.474479 .7628251 1 5 -------------+--------------------------------------------------------- a_hisp | 1,391 0 0 0 0 a_rcat | 1,391 0 0 0 0 a_hrace | 1,391 0 0 0 0 a_eject | 1,391 1.01294 .1130578 1 2 a_perinj | 1,391 4.040978 2.441645 1 6 -------------+--------------------------------------------------------- a_loc | 1,391 1.378145 .784332 1 4 by Jean Roth , jroth@nber.org , 18 Apr 2016