Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 733 2.995907 .9343094 1 5 a_age2 | 733 4.096862 1.295285 1 6 a_age3 | 733 7.948158 2.547374 1 13 a_age4 | 733 4.664393 1.879368 1 8 a_age5 | 733 5.024557 2.386654 1 10 -------------+--------------------------------------------------------- a_age6 | 733 5.031378 2.376536 1 10 a_age7 | 733 6.975443 2.484806 1 12 a_age8 | 733 3.544338 1.863442 1 7 a_age9 | 733 2.013643 .3303078 1 3 st_case | 733 430167.9 93.38866 430001 430333 -------------+--------------------------------------------------------- veh_no | 733 1.085948 .7332699 0 4 per_no | 733 1.369714 .8467292 1 7 year | 733 2010 0 2010 2010 a_ptype | 733 1.603001 .8663987 1 5 a_rest | 733 1.787176 .7671531 1 3 -------------+--------------------------------------------------------- a_alctes | 733 1.920873 .9287534 1 4 a_hisp | 733 .9276944 .9980636 0 2 a_rcat | 733 .4815825 .5343416 0 2 a_hrace | 733 .4638472 .4990318 0 1 a_eject | 733 1.091405 .385665 1 3 -------------+--------------------------------------------------------- a_perinj | 733 3.680764 2.495159 1 6 a_loc | 733 1.381992 .84853 1 4 by Jean Roth , jroth@nber.org , 18 Apr 2016