Summary statistics for nmprior dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |      7,153    25.60101    16.14632          1         56
     st_case |      7,153    256811.6    161347.8      10008     560123
      veh_no |      7,153           0           0          0          0
      per_no |      7,153    1.149588    .7132045          1         16
     mpr_act |      7,153    9.995666     20.2031          1         99

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