Summary statistics for acc_aux dataset :

by Jean Roth , jroth@nber.org , 18 Apr 2016

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        year |     36,254        1994           0       1994       1994
       state |     36,254    27.21639    16.07215          1         56
      county |     36,254    87.46649    91.51538          0        999
      fatals |     36,254    1.123076    .4397571          1         14
     st_case |     36,254    272882.7    160566.6      10001     560135
-------------+---------------------------------------------------------
    a_crainj |     36,254           1           0          1          1
    a_region |     36,254    5.316269     2.39692          1         10
        a_ru |     36,254    1.431401     .498443          1          3
     a_inter |     36,254    1.892453    .3256127          1          3
     a_relrd |     36,254    2.056656    1.389655          1          6
-------------+---------------------------------------------------------
    a_intsec |     36,254    1.774204    .4231605          1          3
    a_roadfc |     36,254    3.921195    1.559634          1          7
      a_junc |     36,254    1.828874    .5087797          1          4
    a_mancol |     36,254    1.997628     1.29824          1          7
        a_rd |     36,254           3           0          3          3
-------------+---------------------------------------------------------
       a_tod |     36,254    1.520936    .5158672          1          3
       a_dow |     36,254    1.428532    .5000297          1          3
        a_hr |     36,254    1.960004    .1959515          1          2
        a_ct |     36,254    1.496138    .6120589          1          3
        a_lt |     36,254    1.879379     .325691          1          2
-------------+---------------------------------------------------------
        a_mc |     36,254     1.93711    .2427677          1          2
     a_spcra |     36,254     1.69653    .4597627          1          2
       a_ped |     36,254    1.849175    .3578829          1          2
     a_pedal |     36,254    1.977823    .1472605          1          2
      a_roll |     36,254    1.742346    .4373487          1          2
-------------+---------------------------------------------------------
    a_polpur |     36,254    1.991035    .0942572          1          2
    a_posbac |     36,254    2.274094    .8614199          1          3
    a_d15_19 |     36,254    1.832239    .3736589          1          2
    a_d16_19 |     36,254    1.838528    .3679707          1          2
    a_d15_20 |     36,254    1.789485    .4076798          1          2
-------------+---------------------------------------------------------
    a_d16_20 |     36,254    1.795774    .4031403          1          2
    a_d65pls |     36,254    1.841452    .3652591          1          2
    a_d21_24 |     36,254    1.833149    .3728475          1          2
    a_d16_24 |     36,254    1.642522    .4792638          1          2
      a_dist |     36,254    1.909003    .2876086          1          2
-------------+---------------------------------------------------------
    a_drowsy |     36,254     1.96006     .195822          1          2

by Jean Roth , jroth@nber.org , 18 Apr 2016