Summary statistics for backsurgeryper1000medicareenroll variable in 1999_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
backsurger~l |        307    3.589473    1.132981   1.060339   8.318828

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