Summary statistics for vsoe dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |        609          43           0         43         43
     st_case |        609    430173.2    101.0407     430001     430343
      veh_no |        609    1.344828    .6609232          1          6
   veventnum |        609    1.247947    .5642297          1          5
         soe |        609    15.96059    11.11269          1         43
-------------+---------------------------------------------------------
         aoi |        609    8.978654    4.179115          0         14

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