Medicare's expanded choices program: issues and evidence from the HMO experience.
D000368:Aged; D003365:Costs and Cost Analysis; D006279:Health Maintenance Organizations / Q000191:economics* / Q000706:statistics & numerical data; D006297:Health Services Accessibility / Q000191:economics; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D006278:Medicare / Q000191:economics*; D011907:Rate Setting and Review / Q000379:methods*; D012051:Reimbursement Mechanisms; D012959:Socioeconomic Factors; D013223:Statistics as Topic; D014481:United States