Summary statistics for drg2mdcxw2006 dataset : by Jean Roth , jroth@nber.org , 22 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- drg | 0 drgnum | 538 288.0595 166.2284 1 579 mdc | 538 8.827138 6.088565 0 25 drgdesc | 0 mdcdesc | 0 by Jean Roth , jroth@nber.org , 22 Apr 2016