Summary statistics for sf12010countydistance100miles dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
     county1 |          0
mi_to_county |    147,156    65.99282     23.1846   1.407852   99.99906
     county2 |          0

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