Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 100,666 2.742227 .9484715 1 5 a_age2 | 100,666 3.736435 1.482483 1 6 a_age3 | 100,666 7.299028 2.669825 1 13 a_age4 | 100,666 4.173554 1.97405 1 8 a_age5 | 100,666 4.450013 2.401946 1 10 -------------+--------------------------------------------------------- a_age6 | 100,666 4.46553 2.382762 1 10 a_age7 | 100,666 6.360092 2.555471 1 12 a_age8 | 100,666 3.110216 1.799579 1 7 veh_no | 100,666 1.341456 .8745713 0 21 per_no | 100,666 1.82884 2.636212 1 98 -------------+--------------------------------------------------------- st_case | 100,666 275556 160539.2 10001 560162 year | 100,666 1999 0 1999 1999 a_ptype | 100,666 1.523811 .6835838 1 5 a_rest | 100,666 1.620309 .6452947 1 3 a_alctes | 100,666 2.626597 1.0294 1 5 -------------+--------------------------------------------------------- a_hisp | 100,666 .632577 .9206275 0 3 a_rcat | 100,666 .9604732 1.994279 0 8 a_hrace | 100,666 1.469642 2.515349 0 9 a_eject | 100,666 1.1351 .3574308 1 3 a_perinj | 100,666 3.92795 2.463112 1 6 -------------+--------------------------------------------------------- a_loc | 100,666 1.119991 .4613684 1 4 by Jean Roth , jroth@nber.org , 18 Apr 2016