1. 2006 Medicare Advantage benefits and premiums Publication: Washington, D.C. : AARP Public Policy Institute, c2006 Subject(s): Insurance, Pharmaceutical Services -- economicsMedicare -- economicsCost SharingFee-for-Service Plans -- economicsForecastingHealth Maintenance Organizations -- economicsInsurance BenefitsInsurance CoverageMedicare -- trendsPreferred Provider Organizations -- economicsHumansUnited States