Summary statistics for AGRMT_END_PRIOR_DT variable in pos2011 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
A~D_PRIOR_DT |      9,856    17334.64    2356.422      10988      19327

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