Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 22 Oct 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 751 2.966711 .8795209 1 5 a_age2 | 751 4.053262 1.244652 1 6 a_age3 | 751 7.860186 2.363139 1 13 a_age4 | 751 4.567244 1.797908 1 8 a_age5 | 751 4.900133 2.276696 1 10 -------------+--------------------------------------------------------- a_age6 | 751 4.906791 2.266708 1 10 a_age7 | 751 6.876165 2.325936 1 12 a_age8 | 751 3.435419 1.78983 1 7 a_age9 | 751 2.003995 .275652 1 3 st_case | 751 430173.1 102.0776 430001 430352 -------------+--------------------------------------------------------- veh_no | 751 1.053262 .711683 0 5 per_no | 751 1.348868 .8411076 1 8 year | 751 2012 0 2012 2012 a_ptype | 751 1.625832 .9076408 1 5 a_rest | 751 1.761651 .7766042 1 3 -------------+--------------------------------------------------------- a_alctes | 751 1.850866 .8666387 1 4 a_hisp | 751 .9747004 1.000346 0 2 a_rcat | 751 .5073236 .538776 0 2 a_hrace | 751 .4873502 .5001731 0 1 a_eject | 751 1.082557 .3594097 1 3 -------------+--------------------------------------------------------- a_perinj | 751 3.563249 2.500865 1 6 a_loc | 751 1.378162 .8120771 1 4 by Jean Roth , jroth@nber.org , 22 Oct 2016