Summary statistics for actvty_stf_othr_cntrct_cnt variable in pos1998 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
actvty_stf.. |     91,904    .0075499    .5663876          0        140

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