title: Insights from the Medicare HMO demonstrations.
authors.affiliation: HCFA Office of Research and Demonstrations, Baltimore, MD 21207.
authors.forename: K M
authors.initials: KM
authors.lastname: Langwell
authors.forename: J P
authors.initials: JP
authors.lastname: Hadley
mesh_terms: D000368:Aged; D003258:Consumer Behavior; D003363:Cost Control; D006279:Health Maintenance Organizations / Q000191:economics*; D006297:Health Services Accessibility; D006801:Humans; D006278:Medicare / Q000458:organization & administration*; D010865:Pilot Projects; D015397:Program Evaluation; D011787:Quality of Health Care; D014481:United States