Summary statistics for sf12000placedistance50miles dataset :

by Jean Roth , jroth@nber.org , 4 Jan 2016

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
      state1 |          0
      place1 |          0
 mi_to_place |  3,348,930    31.21011    12.63822    .084375   49.99997
      state2 |          0
      place2 |          0

by Jean Roth , jroth@nber.org , 4 Jan 2016