Study finds managed Medicaid market starting to fizzle.
D000368:Aged; D019981:Health Care Sector / Q000706:statistics & numerical data; D006279:Health Maintenance Organizations / Q000191:economics / Q000706:statistics & numerical data*; D006302:Health Services Research; D006801:Humans; D007182:Income / Q000706:statistics & numerical data; D006278:Medicare / Q000458:organization & administration / Q000706:statistics & numerical data*; D012306:Risk; D014481:United States