Summary statistics for drimpair dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |     49,088    27.64274    16.28185          1         56
     st_case |     49,088    277117.6    162757.3      10001     560130
      veh_no |     49,088    1.502546      1.5262          1         58
    drimpair |     49,088    26.51175    42.59454          0         99

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