Summary statistics for gaz1990countydistance500miles dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
     county1 |          0
mi_to_county |  2,635,538    315.9712    121.6464   1.341494    499.999
     county2 |          0
        name |          0

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