1. Medicare Part D and the financial protection of the elderly Publication: Chestnut Hill, MA : Center for Retirement Research at Boston College, c2009 Subject(s): Financing, PersonalHealth ExpendituresInsurance, Pharmaceutical Services -- economicsMedicare Part D -- economicsAgedDrug UtilizationEconomic CompetitionInsurance Coverage -- statistics & numerical dataPrivate SectorPublic SectorRiskHumansUnited States