Summary statistics for vsoe dataset :

by Jean Roth , jroth@nber.org , 22 Oct 2016

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |    110,240    28.33228     16.3429          1         56
     st_case |    110,240      283947    163415.4      10001     560113
      veh_no |    110,240    1.298104    .7732781          1         31
   veventnum |    110,240    2.315992    1.626767          1         15
         soe |    110,240    33.85624    25.34537          1         99
-------------+---------------------------------------------------------
         aoi |    110,240    30.39692    28.18881          0         99

by Jean Roth , jroth@nber.org , 22 Oct 2016