Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 968 2.944215 .9523213 1 5 a_age2 | 968 3.977273 1.347371 1 6 a_age3 | 968 7.785124 2.559591 1 13 a_age4 | 968 4.48657 1.925131 1 8 a_age5 | 968 4.83781 2.455717 1 10 -------------+--------------------------------------------------------- a_age6 | 968 4.850207 2.43876 1 10 a_age7 | 968 6.808884 2.510298 1 12 a_age8 | 968 3.385331 1.876561 1 7 veh_no | 968 1.165289 .8246172 0 6 per_no | 968 1.295455 .6648977 1 6 -------------+--------------------------------------------------------- st_case | 968 430218.7 122.9924 430001 430431 year | 968 2007 0 2007 2007 a_ptype | 968 1.55062 .811958 1 5 a_rest | 968 1.563017 .5515382 1 3 a_alctes | 968 1.829545 .917978 1 4 -------------+--------------------------------------------------------- a_hisp | 968 .9328512 .9977406 0 2 a_rcat | 968 .4958678 .5569746 0 3 a_hrace | 968 .4700413 .5116342 0 4 a_eject | 968 1.077479 .3598073 1 3 a_perinj | 968 3.665289 2.495819 1 6 -------------+--------------------------------------------------------- a_loc | 968 1.322314 .732915 1 3 by Jean Roth , jroth@nber.org , 18 Apr 2016