Summary statistics for MDCL_SCL_WORKR_VLNTR_CNT variable in pos2011 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
MDCL_~TR_CNT |      4,807    .0691221    .7199044          0         28

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