Summary statistics for gaz2015zcta5distancemiles dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
        zip1 |          0
        zip2 |          0
 mi_to_zcta5 | 1098491592    1016.932    716.3525   .0492289   9503.773

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