Summary statistics for acc_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- year | 533 1985 0 1985 1985 state | 533 43 0 43 43 county | 533 72 0 72 72 fatals | 533 1.125704 .4916174 1 6 st_case | 533 430299 176.8309 430001 430600 -------------+--------------------------------------------------------- a_crainj | 533 1 0 1 1 a_region | 533 2 0 2 2 a_ru | 533 1.39212 .4886819 1 2 a_inter | 533 2 0 2 2 a_relrd | 533 1.840525 1.310344 1 4 -------------+--------------------------------------------------------- a_intsec | 533 1.864916 .3421348 1 2 a_roadfc | 533 3.898687 1.171825 3 6 a_junc | 533 1.864916 .3421348 1 2 a_mancol | 533 1.500938 .9148416 1 5 a_rd | 533 3 0 3 3 -------------+--------------------------------------------------------- a_tod | 533 1.686679 .4762704 1 3 a_dow | 533 1.49531 .5004477 1 2 a_hr | 533 1.863039 .3441287 1 2 a_ct | 533 1.320826 .5347665 1 3 a_lt | 533 1.97561 .1544024 1 2 -------------+--------------------------------------------------------- a_mc | 533 1.966229 .1808092 1 2 a_spcra | 533 1.476548 .4999189 1 2 a_ped | 533 1.60788 .4886819 1 2 a_pedal | 533 1.964353 .1855833 1 2 a_roll | 533 1.908068 .289202 1 2 -------------+--------------------------------------------------------- a_polpur | 533 1.996248 .0611988 1 2 a_posbac | 533 2.228893 .9136342 1 3 a_d15_19 | 533 1.904315 .2944348 1 2 a_d16_19 | 533 1.906191 .2918362 1 2 a_d15_20 | 533 1.870544 .3360192 1 2 -------------+--------------------------------------------------------- a_d16_20 | 533 1.87242 .3339347 1 2 a_d65pls | 533 1.954972 .2075607 1 2 a_d21_24 | 533 1.801126 .3995282 1 2 a_d16_24 | 533 1.686679 .4642793 1 2 a_dist | 533 2 0 2 2 -------------+--------------------------------------------------------- a_drowsy | 533 1.998124 .0433148 1 2 by Jean Roth , jroth@nber.org , 18 Apr 2016