Summary statistics for primaryid variable in drug2018q1 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |  1,686,461    1.59e+08    1.29e+08   4.12e+07   1.44e+09

by Jean Roth , jroth@nber.org , 19 Jun 2018