Summary statistics for drimpair dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |        482          43           0         43         43
     st_case |        482    430174.7    99.90208     430001     430343
      veh_no |        482    1.358921    .6430609          1          6
    drimpair |        482    .2676349    1.513951          0          9

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