Summary statistics for backsurgeryper1000medicareenroll variable in 1998_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
backsurger~l |        855    3.312002    1.245843   .7331606   8.390316

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