Summary statistics for acc_aux dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        year |     41,438        1987           0       1987       1987
       state |     41,438    27.22173    16.04389          1         56
      county |     41,438     85.3476    92.17909          1        997
      fatals |     41,438    1.119504    .4208819          1          9
     st_case |     41,438    273093.8    160194.6      10001     560114
-------------+---------------------------------------------------------
    a_crainj |     41,438           1           0          1          1
    a_region |     41,438    5.235702    2.494006          1         10
        a_ru |     41,438    1.432453    .4973671          1          3
     a_inter |     41,438    1.905304    .3049896          1          3
     a_relrd |     41,438    2.073459     1.39352          1          6
-------------+---------------------------------------------------------
    a_intsec |     41,438    1.788745    .4091489          1          3
    a_roadfc |     41,438    3.966794    1.502163          1          7
      a_junc |     41,438    1.837758    .4852792          1          4
    a_mancol |     41,438    1.951349    1.282106          1          7
        a_rd |     41,438           3           0          3          3
-------------+---------------------------------------------------------
       a_tod |     41,438    1.575969    .5109121          1          3
       a_dow |     41,438    1.447995    .5020274          1          3
        a_hr |     41,438    1.958854    .1986298          1          2
        a_ct |     41,438    1.474227    .6029821          1          3
        a_lt |     41,438    1.883851    .3204079          1          2
-------------+---------------------------------------------------------
        a_mc |     41,438    1.904001    .2945932          1          2
     a_spcra |     41,438    1.650417    .4768439          1          2
       a_ped |     41,438    1.838626    .3678797          1          2
     a_pedal |     41,438    1.977122    .1495149          1          2
      a_roll |     41,438     1.75356    .4309432          1          2
-------------+---------------------------------------------------------
    a_polpur |     41,438     1.99445    .0742953          1          2
    a_posbac |     41,438    2.196897    .9091582          1          3
    a_d15_19 |     41,438    1.814325    .3888489          1          2
    a_d16_19 |     41,438    1.820455    .3838129          1          2
    a_d15_20 |     41,438    1.767146     .422655          1          2
-------------+---------------------------------------------------------
    a_d16_20 |     41,438    1.773203     .418765          1          2
    a_d65pls |     41,438    1.882523    .3219914          1          2
    a_d21_24 |     41,438     1.79765     .401757          1          2
    a_d16_24 |     41,438    1.588928    .4920342          1          2
      a_dist |     41,438    1.890342    .3124665          1          2
-------------+---------------------------------------------------------
    a_drowsy |     41,438    1.968507    .1746476          1          2

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