Summary statistics for hipreplacementper1000medicareenr variable in 2007_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
hipreplace~r |        307    3.447883    .8806694   1.037071   6.634185

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