Persistence in the choice of health plans.
D003256:Community Participation / Q000191:economics*; D003365:Costs and Cost Analysis; D003657:Decision Making; D004465:Economic Competition; D004467:Economics; D006264:Health Benefit Plans, Employee / Q000706:statistics & numerical data*; D006801:Humans; D007348:Insurance, Health / Q000706:statistics & numerical data*; D008962:Models, Theoretical; D012306:Risk; D014481:United States