Summary statistics for miper dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
     st_case |     63,532    275202.9    159727.2      10001     560118
      veh_no |     63,532    1.279214    .9285778          0         37
      per_no |     63,532    1.016637    .2059011          1         12
        year |     63,532        1997           0       1997       1997
          p1 |     63,532    4.236715    8.446103          0         94
-------------+---------------------------------------------------------
          p2 |     63,532    4.191195    8.405066          0         94
          p3 |     63,532    4.172999    8.399196          0         94
          p4 |     63,532    4.170261    8.392293          0         94
          p5 |     63,532    4.200671    8.399651          0         94
          p6 |     63,532    4.172921      8.4043          0         94
-------------+---------------------------------------------------------
          p7 |     63,532    4.173818    8.403595          0         94
          p8 |     63,532    4.222801    8.432898          0         94
          p9 |     63,532    4.186457    8.414672          0         94
         p10 |     63,532     4.21065    8.449908          0         94

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