Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 1,345 2.843123 .9385506 1 5 a_age2 | 1,345 3.842379 1.386742 1 6 a_age3 | 1,345 7.481784 2.519537 1 13 a_age4 | 1,345 4.270632 1.90228 1 8 a_age5 | 1,345 4.559108 2.370696 1 10 -------------+--------------------------------------------------------- a_age6 | 1,345 4.573978 2.351369 1 10 a_age7 | 1,345 6.509294 2.461328 1 12 a_age8 | 1,345 3.136059 1.820457 1 7 veh_no | 1,345 1.113755 .7809085 0 7 per_no | 1,345 1.6171 1.348447 1 15 -------------+--------------------------------------------------------- st_case | 1,345 430262.6 365.9263 421734 430547 year | 1,345 1989 0 1989 1989 a_ptype | 1,345 1.679554 .823252 1 5 a_rest | 1,345 1.832714 .455914 1 3 a_alctes | 1,345 2.379926 .8420046 1 5 -------------+--------------------------------------------------------- a_hisp | 1,345 0 0 0 0 a_rcat | 1,345 0 0 0 0 a_hrace | 1,345 0 0 0 0 a_eject | 1,345 1.013383 .1149505 1 2 a_perinj | 1,345 3.981413 2.454123 1 6 -------------+--------------------------------------------------------- a_loc | 1,345 1.364312 .7722334 1 3 by Jean Roth , jroth@nber.org , 18 Apr 2016