Summary statistics for mdcl_drctr_cntrct_cnt variable in pos1991 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
mdcl_d~t_cnt |     81,041     .376523    18.04933          0       2000

by Jean Roth , jroth@nber.org , 17 May 2017