Future directions for research.
D003363:Cost Control / Q000639:trends; D003953:Diagnosis-Related Groups; D005544:Forecasting; D006302:Health Services Research / Q000639:trends*; D006739:Hospital Administration / Q000639:trends; D006801:Humans; D006278:Medicare; D011445:Prospective Payment System / Q000639:trends*; D012051:Reimbursement Mechanisms / Q000639:trends*; D014481:United States