Selectivity in the demand for health insurance and health care.
D000206:Actuarial Analysis; D000553:Ambulatory Care / Q000191:economics; D003256:Community Participation / Q000191:economics*; D003657:Decision Making; D006301:Health Services Needs and Demand; D006302:Health Services Research; D006801:Humans; D007348:Insurance, Health / Q000706:statistics & numerical data*; D008962:Models, Theoretical; D014481:United States