Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 101,100 2.741642 .9498846 1 5 a_age2 | 101,100 3.738002 1.484174 1 6 a_age3 | 101,100 7.296162 2.678606 1 13 a_age4 | 101,100 4.175668 1.975613 1 8 a_age5 | 101,100 4.451711 2.4027 1 10 -------------+--------------------------------------------------------- a_age6 | 101,100 4.467428 2.383261 1 10 a_age7 | 101,100 6.357903 2.56264 1 12 a_age8 | 101,100 3.11093 1.800286 1 7 veh_no | 101,100 1.375905 1.247168 0 42 per_no | 101,100 1.774975 2.062028 1 61 -------------+--------------------------------------------------------- st_case | 101,100 275879.2 160117.2 10001 560129 year | 101,100 1998 0 1998 1998 a_ptype | 101,100 1.523798 .6755896 1 5 a_rest | 101,100 1.620801 .6471277 1 3 a_alctes | 101,100 2.624768 1.018553 1 5 -------------+--------------------------------------------------------- a_hisp | 101,100 0 0 0 0 a_rcat | 101,100 0 0 0 0 a_hrace | 101,100 0 0 0 0 a_eject | 101,100 1.131563 .352709 1 3 a_perinj | 101,100 3.947527 2.45963 1 6 -------------+--------------------------------------------------------- a_loc | 101,100 1.121276 .4625463 1 4 by Jean Roth , jroth@nber.org , 18 Apr 2016