title: A case study of HMO Medicare enrollment.
mesh_terms: D003258:Consumer Behavior; D003657:Decision Making; D005260:Female; D006279:Health Maintenance Organizations / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D006278:Medicare; D008875:Middle Aged; D009518:New York; D012189:Retrospective Studies; D012959:Socioeconomic Factors; D013223:Statistics as Topic; D011795:Surveys and Questionnaires