Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 1,282 2.829173 .9765354 1 5 a_age2 | 1,282 3.833853 1.430026 1 6 a_age3 | 1,282 7.48986 2.647133 1 13 a_age4 | 1,282 4.290172 1.970123 1 8 a_age5 | 1,282 4.593604 2.454149 1 10 -------------+--------------------------------------------------------- a_age6 | 1,282 4.605304 2.439316 1 10 a_age7 | 1,282 6.528861 2.567957 1 12 a_age8 | 1,282 3.215289 1.856394 1 7 veh_no | 1,282 1.093604 .744885 0 4 per_no | 1,282 1.49064 1.077912 1 13 -------------+--------------------------------------------------------- st_case | 1,282 430265.1 150.2178 430001 430524 year | 1,282 1998 0 1998 1998 a_ptype | 1,282 1.662246 .8487272 1 5 a_rest | 1,282 1.703588 .5192346 1 3 a_alctes | 1,282 2.134165 .9185926 1 4 -------------+--------------------------------------------------------- a_hisp | 1,282 0 0 0 0 a_rcat | 1,282 0 0 0 0 a_hrace | 1,282 0 0 0 0 a_eject | 1,282 1.082683 .3698593 1 3 a_perinj | 1,282 3.823713 2.479921 1 6 -------------+--------------------------------------------------------- a_loc | 1,282 1.382995 .7867706 1 3 by Jean Roth , jroth@nber.org , 18 Apr 2016