Summary statistics for nmprior dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |      6,509    25.95468     16.2344          1         56
     st_case |      6,509      260290      162250      10006     560100
      veh_no |      6,509           0           0          0          0
      per_no |      6,509    1.130588    .4996926          1          9
     mpr_act |      6,509    8.204486     15.9695          1         99

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