Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 1,486 2.845895 1.007617 1 5 a_age2 | 1,486 3.843203 1.457008 1 6 a_age3 | 1,486 7.52288 2.735319 1 13 a_age4 | 1,486 4.318977 2.006522 1 8 a_age5 | 1,486 4.64603 2.513775 1 10 -------------+--------------------------------------------------------- a_age6 | 1,486 4.658816 2.497678 1 10 a_age7 | 1,486 6.569314 2.646179 1 12 a_age8 | 1,486 3.248318 1.894769 1 7 veh_no | 1,486 1.176985 .7890039 0 5 per_no | 1,486 1.683715 1.600788 1 20 -------------+--------------------------------------------------------- st_case | 1,486 430272.1 159.225 430001 430550 year | 1,486 1994 0 1994 1994 a_ptype | 1,486 1.654105 .7854785 1 5 a_rest | 1,486 1.664872 .532516 1 3 a_alctes | 1,486 2.160834 .8998917 1 4 -------------+--------------------------------------------------------- a_hisp | 1,486 0 0 0 0 a_rcat | 1,486 0 0 0 0 a_hrace | 1,486 0 0 0 0 a_eject | 1,486 1.078735 .3649529 1 3 a_perinj | 1,486 3.987887 2.452757 1 6 -------------+--------------------------------------------------------- a_loc | 1,486 1.318977 .7306677 1 3 by Jean Roth , jroth@nber.org , 18 Apr 2016