Summary statistics for psych_unit_efctv_dt variable in pos2015 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
psych_u~v_dt |      2,340    1.99e+07    93682.39   1.98e+07   2.02e+07

by Jean Roth , jroth@nber.org , 26 Jan 2016