Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 101,175 2.747556 .9382634 1 5 a_age2 | 101,175 3.75916 1.468687 1 6 a_age3 | 101,175 7.32507 2.640336 1 13 a_age4 | 101,175 4.196491 1.957966 1 8 a_age5 | 101,175 4.468643 2.381184 1 10 -------------+--------------------------------------------------------- a_age6 | 101,175 4.48257 2.363717 1 10 a_age7 | 101,175 6.382753 2.530305 1 12 a_age8 | 101,175 3.128678 1.787464 1 7 veh_no | 101,175 1.385194 1.506571 0 57 per_no | 101,175 1.742258 1.779962 1 56 -------------+--------------------------------------------------------- st_case | 101,175 272581.9 162256.9 10001 560155 year | 101,175 2001 0 2001 2001 a_ptype | 101,175 1.509464 .6662252 1 5 a_rest | 101,175 1.585322 .6451861 1 3 a_alctes | 101,175 2.621665 1.056633 1 5 -------------+--------------------------------------------------------- a_hisp | 101,175 .6011169 .8639845 0 3 a_rcat | 101,175 .8920682 1.861864 0 8 a_hrace | 101,175 1.347359 2.3155 0 9 a_eject | 101,175 1.136496 .3597643 1 3 a_perinj | 101,175 3.914702 2.465377 1 6 -------------+--------------------------------------------------------- a_loc | 101,175 1.114752 .4517756 1 4 by Jean Roth , jroth@nber.org , 18 Apr 2016