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Is Drug Coverage a Free Lunch? Cross-Price Elasticities and the Design of Prescription Drug Benefits

Martin Gaynor, Jian Li () and William Vogt ()

No 12758, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: Recently, many U.S. employers have adopted less generous prescription drug benefits. In addition, the U.S. began to offer prescription drug insurance to approximately 42 million Medicare beneficiaries in 2006. We use data on individual health insurance claims and benefit data from 1997-2003 to study the effects of changing consumers' co-payments for prescription drugs on the quantity demanded and expenditure on prescription drugs, inpatient care and outpatient care. We allow for effects both in the year of the co-payment change and in the year following the change. Our results show that increases in prescription drug prices reduce both the use of and spending on prescription drugs. However, consumers substitute the use of outpatient care and inpatient care for prescription drug use, and about 35% of the expenditure reductions on prescription drugs are offset by the increases in other spending.

JEL-codes: D12 I10 M50 (search for similar items in EconPapers)
Date: 2006-12
New Economics Papers: this item is included in nep-hea, nep-ias and nep-reg
Note: EH
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