Summary statistics for backsurgeryper1000medicareenroll variable in 1999_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
backsurger~l |        884    3.391074    1.291118   .7614852   9.319005

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