1. An illustrative analysis of Medicare Options Compare: what's there and what's not Publication: Washington, D.C. : AARP Public Policy Institute, c2009 Subject(s): Choice BehaviorInternetManaged Care Programs -- economicsMedicare -- economicsAccess to InformationCost SharingHealth Maintenance Organizations -- economicsInsurance CoverageMedicare Part D -- economicsPatient SatisfactionPreferred Provider Organizations -- economicsHumansUnited StatesCenters for Medicare & Medicaid Services (U.S.)