Summary statistics for drg2mdcxw1992 dataset : by Jean Roth , jroth@nber.org , 22 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- drg | 0 drgnum | 492 246.5 142.1724 1 492 mdc | 492 9.134146 6.091152 0 25 drgdesc | 0 mdcdesc | 0 by Jean Roth , jroth@nber.org , 22 Apr 2016