Summary statistics for distract dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |     44,977    27.88714    16.29399          1         56
     st_case |     44,977    279531.4    162912.2      10001     560131
      veh_no |     44,977    1.442915    1.002661          1         40
    mdrdstrd |     44,977    25.66376    42.40431          0         99

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