Summary statistics for sf12000countydistance500miles dataset :

by Jean Roth , jroth@nber.org , 29 Mar 2016

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
     county1 |          0
mi_to_county |  2,640,284    315.2695    122.2508   .9607159   499.9998
     county2 |          0

by Jean Roth , jroth@nber.org , 29 Mar 2016