Summary statistics for form_1557_test_vol_cnt variable in posclia2011 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
form_1557_~t |    401,319    3697.532    108293.4          0   1.99e+07

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