Summary statistics for drimpair dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |     45,298    27.89295    16.28313          1         56
     st_case |     45,298    279570.9    162796.5      10001     560075
      veh_no |     45,298    1.522628    2.437434          1         90
    drimpair |     45,298    22.37591    39.90531          0         99

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