Summary statistics for backsurgeryper1000medicareenroll variable in 2009_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
backsurger~l |      2,159    .4903103     5.62928     -19.16      13.62

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