Summary statistics for acc_aux dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        year |     37,324        1997           0       1997       1997
       state |     37,324    27.69339    16.01708          1         56
      county |     37,324    88.99847    93.90807          0        999
      fatals |     37,324     1.12563    .4387252          1         11
     st_case |     37,324    277635.8      160093      10001     560118
-------------+---------------------------------------------------------
    a_crainj |     37,324           1           0          1          1
    a_region |     37,324    5.263825    2.365256          1         10
        a_ru |     37,324    1.417372     .495625          1          3
     a_inter |     37,324    1.889187     .346832          1          3
     a_relrd |     37,324    2.059345    1.389053          1          6
-------------+---------------------------------------------------------
    a_intsec |     37,324    1.771514    .4273891          1          3
    a_roadfc |     37,324    3.930259    1.586805          1          7
      a_junc |     37,324    1.821134    .5076351          1          4
    a_mancol |     37,324    2.033892    1.317405          1          7
        a_rd |     37,324           3           0          3          3
-------------+---------------------------------------------------------
       a_tod |     37,324    1.511976    .5177152          1          3
       a_dow |     37,324    1.417935    .4981447          1          3
        a_hr |     37,324    1.961285    .1929175          1          2
        a_ct |     37,324    1.507957    .6170908          1          3
        a_lt |     37,324     1.87638    .3291522          1          2
-------------+---------------------------------------------------------
        a_mc |     37,324    1.943923    .2300725          1          2
     a_spcra |     37,324    1.696763    .4596627          1          2
       a_ped |     37,324    1.858724    .3483111          1          2
     a_pedal |     37,324     1.97803    .1465868          1          2
      a_roll |     37,324    1.734702    .4414979          1          2
-------------+---------------------------------------------------------
    a_polpur |     37,324    1.993061    .0830137          1          2
    a_posbac |     37,324    2.311435    .8411598          1          3
    a_d15_19 |     37,324    1.835495    .3707385          1          2
    a_d16_19 |     37,324    1.840692    .3659677          1          2
    a_d15_20 |     37,324    1.796351    .4027164          1          2
-------------+---------------------------------------------------------
    a_d16_20 |     37,324    1.801522    .3988595          1          2
    a_d65pls |     37,324    1.829707    .3758947          1          2
    a_d21_24 |     37,324    1.852588    .3545208          1          2
    a_d16_24 |     37,324    1.665443    .4718416          1          2
      a_dist |     37,324    1.891062    .3115655          1          2
-------------+---------------------------------------------------------
    a_drowsy |     37,324    1.965063    .1836235          1          2

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