Summary statistics for acc_aux dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        year |     38,444        2004           0       2004       2004
       state |     38,444    27.27273    16.23607          1         56
      county |     38,444    88.58639    90.99287          0        999
      fatals |     38,444    1.114244    .4168573          1         15
     st_case |     38,444    273491.6    162238.4      10001     560142
-------------+---------------------------------------------------------
    a_crainj |     38,444           1           0          1          1
    a_region |     38,444    5.297029    2.369872          1         10
        a_ru |     38,444     1.42571    .4979167          1          3
     a_inter |     38,444    1.883389    .3567343          1          3
     a_relrd |     38,444    2.114166    1.390919          1          6
-------------+---------------------------------------------------------
    a_intsec |     38,444    1.776584    .4221232          1          3
    a_roadfc |     38,444    3.908282    1.605215          1          7
      a_junc |     38,444    1.836854    .5158756          1          4
    a_mancol |     38,444    2.032177    1.361711          1          7
       a_tod |     38,444    1.516622    .5176282          1          3
-------------+---------------------------------------------------------
       a_dow |     38,444     1.42212     .499195          1          3
        a_hr |     38,444    1.960072    .1957931          1          2
        a_ct |     38,444    1.500182     .621582          1          3
        a_lt |     38,444    1.883519    .3208051          1          2
        a_mc |     38,444    1.897279    .3035979          1          2
-------------+---------------------------------------------------------
     a_spcra |     38,444    1.696338    .4598446          1          2
       a_ped |     38,444    1.878759    .3264117          1          2
     a_pedal |     38,444    1.980881    .1369441          1          2
      a_roll |     38,444    1.715664    .4511033          1          2
    a_polpur |     38,444    1.992196    .0879935          1          2
-------------+---------------------------------------------------------
    a_posbac |     38,444    2.308527    .8352826          1          3
    a_d15_19 |     38,444    1.844163    .3627055          1          2
    a_d16_19 |     38,444    1.848585    .3584576          1          2
    a_d15_20 |     38,444    1.802336    .3982426          1          2
    a_d16_20 |     38,444    1.806706    .3948868          1          2
-------------+---------------------------------------------------------
    a_d65pls |     38,444    1.847076    .3599187          1          2
    a_d21_24 |     38,444    1.839845    .3667545          1          2
    a_d16_24 |     38,444    1.659271    .4739607          1          2
        a_rd |     38,444    1.487176     .499842          1          2
      a_dist |     38,444    1.887811    .3156031          1          2
-------------+---------------------------------------------------------
    a_drowsy |     38,444    1.970086    .1703513          1          2

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