Summary statistics for nmprior dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |      5,702    25.57103    16.00393          1         56
     st_case |      5,702      256414    159954.5      10022     560061
      veh_no |      5,702           0           0          0          0
      per_no |      5,702    1.108032    .4628739          1          8
     mpr_act |      5,702    9.114346    18.62771          1         99

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