Insurer Competition in Health Care Markets

Kate Ho and Robin Lee

No 10812, CEPR Discussion Papers from C.E.P.R. Discussion Papers

Abstract: The impact of insurer competition on welfare, negotiated provider prices, and premiums in the U.S. private health care industry is theoretically ambiguous. Reduced competition may increase the premiums charged by insurers and their payments made to hospitals. However, it may also strengthen insurers' bargaining leverage when negotiating with hospitals, thereby generating offsetting cost decreases. To understand and measure this trade-off, we estimate a model of employer-insurer and hospital-insurer bargaining over premiums and reimbursements, household demand for insurance, and individual demand for hospitals using detailed California admissions, claims, and enrollment data. We simulate the removal of both large and small insurers from consumers' choice sets. Although consumer welfare decreases and premiums typically increase, we find that premiums can fall upon the removal of a small insurer if an employer imposes effective premium constraints through negotiations with the remaining insurers. We also document substantial heterogeneity in hospital price adjustments upon the removal of an insurer, with renegotiated price increases and decreases of as much as 10% across markets.

Keywords: Bargaining; Health care markets; Vertical contracts (search for similar items in EconPapers)
JEL-codes: I11 L10 (search for similar items in EconPapers)
Date: 2015-09
New Economics Papers: this item is included in nep-com, nep-hea and nep-ias
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

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Related works:
Journal Article: Insurer Competition in Health Care Markets (2017)
Working Paper: Insurer Competition in Health Care Markets (2013)
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