Summary statistics for sf12010countydistance25miles dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
     county1 |          0
 countyname1 |          0
mi_to_county |      8,384    19.47276    4.588942   1.407852    24.9988
     county2 |          0
 countyname2 |          0

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