Summary statistics for distract dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |     45,921     27.9279    16.12993          1         56
     st_case |     45,921    279875.8    161266.1      10001     560139
      veh_no |     45,921    1.438754    .7683866          1         15
    mdrdstrd |     45,921    19.32353    37.99127          0         99

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