Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 22 Oct 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 637 3.00157 .9391874 1 5 a_age2 | 637 4.087912 1.30256 1 6 a_age3 | 637 7.990581 2.589269 1 13 a_age4 | 637 4.6719 1.90102 1 8 a_age5 | 637 5.062794 2.439677 1 10 -------------+--------------------------------------------------------- a_age6 | 637 5.070644 2.428157 1 10 a_age7 | 637 7.018838 2.526518 1 12 a_age8 | 637 3.549451 1.870699 1 7 a_age9 | 637 2.010989 .324384 1 3 st_case | 637 430141.2 83.55551 430001 430288 -------------+--------------------------------------------------------- veh_no | 637 1.083203 .7382095 0 4 per_no | 637 1.373626 .8384218 1 7 year | 637 2014 0 2014 2014 a_ptype | 637 1.607535 .8429171 1 5 a_rest | 637 1.750392 .7903828 1 3 -------------+--------------------------------------------------------- a_alctes | 637 1.786499 .8531885 1 4 a_hisp | 637 .9544741 .9997482 0 2 a_rcat | 637 .4803768 .5062576 0 2 a_hrace | 637 .477237 .4998741 0 1 a_eject | 637 1.084772 .3749681 1 3 -------------+--------------------------------------------------------- a_perinj | 637 3.613815 2.49937 1 6 a_loc | 637 1.400314 .853148 1 4 by Jean Roth , jroth@nber.org , 22 Oct 2016