Summary statistics for hipreplacementper1000medicareenr variable in 1994_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
hipreplace~r |        307     2.30337    .6184957   .8044249   4.172135

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