Summary statistics for acc_aux dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        year |     36,937        1991           0       1991       1991
       state |     36,937    27.32496    16.08158          1         56
      county |     36,937    86.34348    91.73021          0        999
      fatals |     36,937    1.123751    .4318179          1         10
     st_case |     36,937    274009.6    160632.4      10001     560107
-------------+---------------------------------------------------------
    a_crainj |     36,937           1           0          1          1
    a_region |     36,937    5.272545    2.447905          1         10
        a_ru |     36,937    1.430111    .4978248          1          3
     a_inter |     36,937    1.895579    .3144526          1          3
     a_relrd |     36,937    2.145762     1.44213          1          6
-------------+---------------------------------------------------------
    a_intsec |     36,937    1.789994    .4087116          1          3
    a_roadfc |     36,937    3.964128    1.537414          1          7
      a_junc |     36,937    1.842976    .4901361          1          4
    a_mancol |     36,937    1.932534    1.276229          1          7
        a_rd |     36,937           3           0          3          3
-------------+---------------------------------------------------------
       a_tod |     36,937    1.562715    .5128037          1          3
       a_dow |     36,937    1.448927    .5021585          1          3
        a_hr |     36,937    1.954246     .208953          1          2
        a_ct |     36,937    1.461868    .5988614          1          3
        a_lt |     36,937    1.889081    .3140356          1          2
-------------+---------------------------------------------------------
        a_mc |     36,937    1.925007    .2633829          1          2
     a_spcra |     36,937    1.671549    .4696562          1          2
       a_ped |     36,937    1.843626    .3632148          1          2
     a_pedal |     36,937    1.977259      .14908          1          2
      a_roll |     36,937    1.741316    .4379174          1          2
-------------+---------------------------------------------------------
    a_polpur |     36,937    1.992799    .0845564          1          2
    a_posbac |     36,937    2.194764    .8942769          1          3
    a_d15_19 |     36,937    1.834746     .371415          1          2
    a_d16_19 |     36,937    1.840404     .366236          1          2
    a_d15_20 |     36,937    1.787882    .4088135          1          2
-------------+---------------------------------------------------------
    a_d16_20 |     36,937    1.793405    .4048678          1          2
    a_d65pls |     36,937    1.858949    .3480788          1          2
    a_d21_24 |     36,937     1.82462    .3802967          1          2
    a_d16_24 |     36,937    1.632076     .482247          1          2
      a_dist |     36,937    1.895525    .3058801          1          2
-------------+---------------------------------------------------------
    a_drowsy |     36,937     1.96272    .1894489          1          2

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