Summary statistics for drg2mdcxw2003 dataset : by Jean Roth , jroth@nber.org , 22 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- drg | 0 drgnum | 518 267.4054 155.2866 1 540 mdc | 518 8.92278 6.092916 0 25 drgdesc | 0 mdcdesc | 0 by Jean Roth , jroth@nber.org , 22 Apr 2016