Summary statistics for veh_aux dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        year |     56,922        1998           0       1998       1998
      veh_no |     56,922    1.489213    1.293764          1         42
     st_case |     56,922    278026.6    159141.7      10001     560129
      a_body |     56,922    2.410966    2.029903          1          9
      a_imp1 |     56,922    2.693581    1.352814          1          7
-------------+---------------------------------------------------------
      a_imp2 |     56,922    2.755525     1.40524          1          7
     a_vroll |     56,922    1.819156    .3848922          1          2
     a_lic_s |     56,922    1.275588    .7064774          1          4
     a_lic_c |     56,922    1.170233    .4435896          1          3
     a_cdl_s |     56,922    1.902797    .3776297          1          3
-------------+---------------------------------------------------------
    a_mc_l_s |     56,922     3.89071    .5378966          1          4
     a_spveh |     56,922    1.801325    .3990066          1          2
      a_sbus |     56,922    2.995766    .0912523          1          3
    a_mod_yr |     56,922    2120.143    1011.545       1926       9999
     a_drdis |     56,922    1.926759    .2605333          1          2
-------------+---------------------------------------------------------
     a_drdro |     56,922    1.975528    .1545109          1          2

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