Summary statistics for acc_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- year | 437 2005 0 2005 2005 state | 437 43 0 43 43 county | 437 72 0 72 72 fatals | 437 1.045767 .2398617 1 4 st_case | 437 430219 126.2953 430001 430437 -------------+--------------------------------------------------------- a_crainj | 437 1 0 1 1 a_region | 437 2 0 2 2 a_ru | 437 1.535469 .499312 1 2 a_inter | 437 1.826087 .3794691 1 2 a_relrd | 437 2.09611 1.39294 1 4 -------------+--------------------------------------------------------- a_intsec | 437 1.979405 .1421868 1 2 a_roadfc | 437 3.677346 1.58078 1 6 a_junc | 437 1.979405 .1421868 1 2 a_mancol | 437 1.814645 1.332366 1 6 a_tod | 437 1.636156 .481656 1 2 -------------+--------------------------------------------------------- a_dow | 437 1.489703 .5004669 1 2 a_hr | 437 1.929062 .2570158 1 2 a_ct | 437 1.370709 .5825149 1 3 a_lt | 437 1.91762 .2752577 1 2 a_mc | 437 1.800915 .3997695 1 2 -------------+--------------------------------------------------------- a_spcra | 437 1.528604 .4997533 1 2 a_ped | 437 1.693364 .4616255 1 2 a_pedal | 437 1.974828 .1568257 1 2 a_roll | 437 1.913043 .2820943 1 2 a_polpur | 437 1.997712 .0478365 1 2 -------------+--------------------------------------------------------- a_posbac | 437 2.009153 .8098638 1 3 a_d15_19 | 437 1.887872 .3158857 1 2 a_d16_19 | 437 1.892449 .3101682 1 2 a_d15_20 | 437 1.826087 .3794691 1 2 a_d16_20 | 437 1.830664 .3754786 1 2 -------------+--------------------------------------------------------- a_d65pls | 437 1.91762 .2752577 1 2 a_d21_24 | 437 1.80778 .3944964 1 2 a_d16_24 | 437 1.649886 .4775523 1 2 a_rd | 437 1.684211 .4653623 1 2 a_dist | 437 2 0 2 2 -------------+--------------------------------------------------------- a_drowsy | 437 1.993135 .082665 1 2 by Jean Roth , jroth@nber.org , 18 Apr 2016