Summary statistics for vsoe dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |    106,601    28.00711    16.42763          1         56
     st_case |    106,601    280701.8    164244.2      10001     560075
      veh_no |    106,601    1.350822    1.684985          1         90
   veventnum |    106,601    2.276667    1.591774          1         19
         soe |    106,601    33.56708    25.24365          1         99
-------------+---------------------------------------------------------
         aoi |    106,601    30.67348    28.68283          0         99

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