Summary statistics for vsoe dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |        543          43           0         43         43
     st_case |        543    430165.7    94.69981     430001     430333
      veh_no |        543    1.292818    .5673171          1          4
   veventnum |        543    1.211786    .5094034          1          4
         soe |        543    16.34622    11.49915          1         43
-------------+---------------------------------------------------------
         aoi |        543    9.099448    4.199066          0         12

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