Summary statistics for nmprior dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
       state |      6,610    25.00666    16.29374          1         56
     st_case |      6,610    250839.3    162811.1      10015     560111
      veh_no |      6,610           0           0          0          0
      per_no |      6,610    1.218457    1.113375          1         21
     mpr_act |      6,610    9.447352    18.79079          1         99

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