Summary statistics for ptaxcode dataset :

by Jean Roth , jroth@nber.org , 19 Apr 2019

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
         npi |          0
         seq |  7,196,453    1.344834    1.020646          1         15
    ptaxcode |          0
    pprimtax |          0
   ptaxgroup |          0

by Jean Roth , jroth@nber.org , 19 Apr 2019