Summary statistics for backsurgeryper1000medicareenroll variable in 1992_surg_d

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
backsurger~l |        307    2.656361    .9032857   .8776144   6.713105

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