Summary statistics for violatn dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |     47,712    27.95012      16.248          1         56
     st_case |     47,712    280158.3    162458.9      10001     560131
      veh_no |     47,712    1.422766    .9798904          1         40
    mviolatn |     47,712    6.631309    20.85879          0         99

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