Summary statistics for veh_aux dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        year |        740        1997           0       1997       1997
      veh_no |        740    1.286486    .5244559          1          4
     st_case |        740    430279.9    158.6866     430001     430553
      a_body |        740        2.25    2.328487          1          9
      a_imp1 |        740    2.478378    1.027796          1          6
-------------+---------------------------------------------------------
      a_imp2 |        740    2.635135    1.240655          1          6
     a_vroll |        740    1.935135    .2464538          1          2
     a_lic_s |        740    1.386486    .7902183          1          4
     a_lic_c |        740    1.322973    .6086982          1          3
     a_cdl_s |        740     2.07027    .2761272          1          3
-------------+---------------------------------------------------------
    a_mc_l_s |        740    3.890541    .5482581          1          4
     a_spveh |        740    1.635135    .4817178          1          2
      a_sbus |        740           3           0          3          3
    a_mod_yr |        740    2518.919    1993.247       1967       9999
     a_drdis |        740           2           0          2          2
-------------+---------------------------------------------------------
     a_drdro |        740    1.997297    .0519523          1          2

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