Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 22 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 102,120 2.647904 .9267688 1 5 a_age2 | 102,120 3.534107 1.428198 1 6 a_age3 | 102,120 6.959264 2.515298 1 13 a_age4 | 102,120 3.870907 1.886779 1 8 a_age5 | 102,120 4.092205 2.284403 1 10 -------------+--------------------------------------------------------- a_age6 | 102,120 4.107168 2.267311 1 10 a_age7 | 102,120 6.012789 2.415949 1 12 a_age8 | 102,120 2.814787 1.733842 1 7 veh_no | 102,120 1.239023 .7255562 0 18 per_no | 102,120 1.713337 1.838387 1 65 -------------+--------------------------------------------------------- st_case | 102,120 279210.5 159518.5 10001 560174 year | 102,120 1982 0 1982 1982 a_ptype | 102,120 1.557148 .7033924 1 5 a_rest | 102,120 2.147924 .46966 1 3 a_alctes | 102,120 2.825832 .9141524 1 5 -------------+--------------------------------------------------------- a_hisp | 102,120 0 0 0 0 a_rcat | 102,120 0 0 0 0 a_hrace | 102,120 0 0 0 0 a_eject | 102,120 1.149902 .4010789 1 3 a_perinj | 102,120 3.848365 2.475622 1 6 -------------+--------------------------------------------------------- a_loc | 102,120 1.166755 .5425819 1 4 by Jean Roth , jroth@nber.org , 22 Apr 2016