Summary statistics for waltham25 dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   placename |          0
      state1 |          0
      place1 |          0
 mi_to_place |        146    23.32472    10.61425   3.193676   40.21174
       state |          0
-------------+---------------------------------------------------------
       place |          0
   statename |          0

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