Summary statistics for PT_AIDE_PRTM_CNT variable in pos2011 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
PT_AIDE_PR~T |     37,813    .0278851    .5289169          0      74.29

by Jean Roth , jroth@nber.org , 19 Apr 2019