Summary statistics for d_4_hos_c4_66 variable in prds_hosp10_yr2012 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
d_4_hos~4_66 |          1       21821           .      21821      21821

by Jean Roth , jroth@nber.org , 24 Aug 2018