Summary statistics for backsurgeryper1000medicareenroll variable in 1999_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
backsurger~l |         52    3.525187    1.073029   1.060339   6.808836

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