Summary statistics for hipreplacementper1000medicareenr variable in 1998_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
hipreplace~r |         52    2.721933    .6687958   .7971734   4.037902

by Jean Roth , jroth@nber.org , 14 Mar 2018