Summary statistics for sf12000zcta5distancemiles dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        zip1 |          0
        zip2 |          0
 mi_to_zcta5 | 1100746506    1007.101    692.0933   .0329837   6088.632

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