Summary statistics for primaryid variable in rpsr2015q1 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |     28,245    1.08e+08    1.01e+07   4.11e+07   9.96e+08

by Jean Roth , jroth@nber.org , 6 Apr 2017