Summary statistics for cholecystectomyper1000medicareen variable in 2007_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
cholecyste~n |      2,070   -.3329291    4.541066  -13.36461   7.537993

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