Summary statistics for cholecystectomyper1000medicareen variable in 2009_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
cholecyste~n |      1,901   -.2860547    4.071315     -11.38       7.74

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