Patient self-selection in HMOs.
D000206:Actuarial Analysis; D002204:Capitation Fee; D003256:Community Participation / Q000191:economics*; D005251:Fees, Medical; D006264:Health Benefit Plans, Employee / Q000191:economics; D006279:Health Maintenance Organizations / Q000706:statistics & numerical data*; D006278:Medicare / Q000191:economics; D014481:United States