Summary statistics for acc_aux dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        year |     38,477        2003           0       2003       2003
       state |     38,477    27.43499    16.15495          1         56
      county |     38,477    89.21057    91.17886          0        999
      fatals |     38,477    1.114536    .4144896          1         10
     st_case |     38,477    275119.1    161438.5      10001     560141
-------------+---------------------------------------------------------
    a_crainj |     38,477           1           0          1          1
    a_region |     38,477    5.320425    2.375994          1         10
        a_ru |     38,477    1.431738    .5020998          1          3
     a_inter |     38,477    1.882709    .3451529          1          3
     a_relrd |     38,477    2.132625    1.402719          1          6
-------------+---------------------------------------------------------
    a_intsec |     38,477    1.773501    .4243064          1          3
    a_roadfc |     38,477     3.93157     1.59675          1          7
      a_junc |     38,477     1.83008    .5134399          1          4
    a_mancol |     38,477    2.032617    1.361307          1          7
        a_rd |     38,477           3           0          3          3
-------------+---------------------------------------------------------
       a_tod |     38,477    1.516802    .5202118          1          3
       a_dow |     38,477    1.424513    .5001299          1          3
        a_hr |     38,477      1.9606    .1945476          1          2
        a_ct |     38,477     1.50269    .6222762          1          3
        a_lt |     38,477    1.887335    .3161866          1          2
-------------+---------------------------------------------------------
        a_mc |     38,477    1.905892    .2919829          1          2
     a_spcra |     38,477    1.691556     .461857          1          2
       a_ped |     38,477    1.876706    .3287791          1          2
     a_pedal |     38,477    1.983497    .1274026          1          2
      a_roll |     38,477    1.719235    .4493788          1          2
-------------+---------------------------------------------------------
    a_polpur |     38,477    1.992359    .0870789          1          2
    a_posbac |     38,477    2.288926    .8422918          1          3
    a_d15_19 |     38,477    1.844712    .3621833          1          2
    a_d16_19 |     38,477    1.849469    .3575963          1          2
    a_d15_20 |     38,477    1.802869    .3978371          1          2
-------------+---------------------------------------------------------
    a_d16_20 |     38,477    1.807573    .3942115          1          2
    a_d65pls |     38,477    1.842139    .3646149          1          2
    a_d21_24 |     38,477    1.843517    .3633174          1          2
    a_d16_24 |     38,477    1.662552    .4728454          1          2
      a_dist |     38,477    1.870208    .3360786          1          2
-------------+---------------------------------------------------------
    a_drowsy |     38,477    1.971256    .1670896          1          2

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