Summary statistics for psych_unit_efctv_dt variable in pos2013 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
psych_u~v_dt |      2,304    1.99e+07    87962.55   1.97e+07   2.01e+07

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