Summary statistics for drg2mdcxw1995 dataset : by Jean Roth , jroth@nber.org , 22 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- drg | 0 drgnum | 492 247.437 142.7158 1 495 mdc | 492 9.103659 6.079533 0 25 drgdesc | 0 mdcdesc | 0 by Jean Roth , jroth@nber.org , 22 Apr 2016