Summary statistics for primaryid variable in reac2013q1 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    658,452    9.54e+07    5.78e+07   3.04e+07   8.93e+08

by Jean Roth , jroth@nber.org , 7 Apr 2017