Summary statistics for acc_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- year | 531 1999 0 1999 1999 state | 531 43 0 43 43 county | 531 73.74576 40.22837 72 999 fatals | 531 1.050847 .2364323 1 3 st_case | 531 430270.7 154.6895 430002 430538 -------------+--------------------------------------------------------- a_crainj | 531 1 0 1 1 a_region | 531 2 0 2 2 a_ru | 531 1.615819 .4868596 1 2 a_inter | 531 1.813559 .3898291 1 2 a_relrd | 531 1.890772 1.328686 1 4 -------------+--------------------------------------------------------- a_intsec | 531 1.932203 .2516336 1 2 a_roadfc | 531 3.753296 1.647572 1 6 a_junc | 531 1.932203 .2516336 1 2 a_mancol | 531 1.845574 1.338358 1 5 a_rd | 531 3 0 3 3 -------------+--------------------------------------------------------- a_tod | 531 1.640301 .4842765 1 3 a_dow | 531 1.482109 .500151 1 2 a_hr | 531 1.913371 .2815559 1 2 a_ct | 531 1.361582 .5400494 1 3 a_lt | 531 1.943503 .231097 1 2 -------------+--------------------------------------------------------- a_mc | 531 1.932203 .2516336 1 2 a_spcra | 531 1.517891 .500151 1 2 a_ped | 531 1.638418 .4809116 1 2 a_pedal | 531 1.971751 .1658385 1 2 a_roll | 531 1.928437 .2580062 1 2 -------------+--------------------------------------------------------- a_polpur | 531 2 0 2 2 a_posbac | 531 2.13371 .8027154 1 3 a_d15_19 | 531 1.879473 .3258841 1 2 a_d16_19 | 531 1.883239 .3214379 1 2 a_d15_20 | 531 1.830508 .3755393 1 2 -------------+--------------------------------------------------------- a_d16_20 | 531 1.834275 .3721843 1 2 a_d65pls | 531 1.928437 .2580062 1 2 a_d21_24 | 531 1.80226 .3986706 1 2 a_d16_24 | 531 1.645951 .478675 1 2 a_dist | 531 1.998117 .0433963 1 2 -------------+--------------------------------------------------------- a_drowsy | 531 1.998117 .0433963 1 2 by Jean Roth , jroth@nber.org , 18 Apr 2016