Summary statistics for pdp2008 dataset : by Jean Roth , jroth@nber.org , 14 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- state | 0 companyname | 0 planname | 0 benefittype | 0 zerodollar~o | 0 -------------+--------------------------------------------------------- monthlydru~m | 2,776 40.27507 19.98797 2.6 107.5 annualdrug~e | 2,776 104.6776 128.9631 0 275 typeofextr~d | 0 contractid | 0 planid | 0 -------------+--------------------------------------------------------- benefittyp~l | 0 by Jean Roth , jroth@nber.org , 14 Apr 2016