Summary statistics for nmprior dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |      6,038    25.78321     16.2598          1         56
     st_case |      6,038    258554.2    162497.6      10009     560119
      veh_no |      6,038           0           0          0          0
      per_no |      6,038     1.10467    .3962405          1          6
     mpr_act |      6,038    8.944021    17.94156          1         99

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