Summary statistics for acc_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- year | 486 1983 0 1983 1983 state | 486 43 0 43 43 county | 486 72 0 72 72 fatals | 486 1.057613 .2885686 1 4 st_case | 486 430247.7 143.2221 430001 430494 -------------+--------------------------------------------------------- a_crainj | 486 1 0 1 1 a_region | 486 2 0 2 2 a_ru | 486 1.427984 .4952963 1 2 a_inter | 486 2 0 2 2 a_relrd | 486 1.796296 1.281778 1 6 -------------+--------------------------------------------------------- a_intsec | 486 1.831276 .3748941 1 2 a_roadfc | 486 4.216049 1.436142 2 6 a_junc | 486 1.837449 .3857205 1 3 a_mancol | 486 1.615226 1.156824 1 5 a_rd | 486 3 0 3 3 -------------+--------------------------------------------------------- a_tod | 486 1.631687 .5037427 1 3 a_dow | 486 1.580247 .5023047 1 3 a_hr | 486 1.874486 .3316427 1 2 a_ct | 486 1.312757 .5381544 1 3 a_lt | 486 1.969136 .1731279 1 2 -------------+--------------------------------------------------------- a_mc | 486 1.940329 .23712 1 2 a_spcra | 486 1.576132 .4946792 1 2 a_ped | 486 1.553498 .497642 1 2 a_pedal | 486 1.962963 .1890472 1 2 a_roll | 486 1.888889 .3145935 1 2 -------------+--------------------------------------------------------- a_polpur | 486 1.997942 .0453609 1 2 a_posbac | 486 2.345679 .8989409 1 3 a_d15_19 | 486 1.925926 .2621613 1 2 a_d16_19 | 486 1.925926 .2621613 1 2 a_d15_20 | 486 1.876543 .3292998 1 2 -------------+--------------------------------------------------------- a_d16_20 | 486 1.876543 .3292998 1 2 a_d65pls | 486 1.965021 .183917 1 2 a_d21_24 | 486 1.835391 .3712094 1 2 a_d16_24 | 486 1.718107 .4503851 1 2 a_dist | 486 2 0 2 2 -------------+--------------------------------------------------------- a_drowsy | 486 1.989712 .101011 1 2 by Jean Roth , jroth@nber.org , 18 Apr 2016