Summary statistics for backsurgeryper1000medicareenroll variable in 1993_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
backsurger~l |         52    2.531405    .6688066   1.280418   4.566954

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