Summary statistics for a00100 variable in zipcode2008 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
      a00100 |    191,283    4.17e+07    1.18e+08   -8545497   1.07e+10

by Jean Roth , jroth@nber.org , 20 Jun 2017