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916期 6月26日 :Multimarket Contact in Health Insurance: Evidence from Medicare Advantage (Authors: LIN Haizhen (Indiana University), Ian McCarthy (Emory University))(LIN Haizhen, Indiana University, 副教授)

【主讲】LIN Haizhen (Indiana University, 副教授)

【主题】Multimarket Contact in Health Insurance: Evidence from Medicare Advantage (Authors: LIN Haizhen (Indiana University), Ian McCarthy (Emory University))

【时间】2018年6月26日 (周二) 15:30-17:00

【地点】上海财经大学经济学院楼701室

【语言】英文

【摘要】Many industries, including health insurance, are characterized by a handful of large firms that compete in multiple geographic markets. Such overlap across markets, defined as multimarket contact (MMC), may facilitate tacit collusion and thus reduce the intensity of competition. We examine the effects of MMC on health insurance prices and quality using comprehensive data on the Medicare Advantage (MA) market from 2008 through 2015. Our estimation strategy exploits two plausibly exogenous changes to MMC: 1) a merger-induced change in MMC due to consolidations in other markets; and 2) reimbursement policy changes in which benchmark rates were increased in a subset of markets, encouraging additional entry into those markets and therefore affecting MMC even in markets otherwise unaffected by the policy itself. Across a range of estimates and alternative measures of MMC, our results consistently support the mutual forbearance hypothesis, where we find that prices are significantly higher and hiqh-quality plans less pervasive as MMC increases. These results suggest MMC as one potential channel through which MA policy and cross-market consolidations could alter competitiveness in local markets otherwise unaffected by the policy or merger.

【讲员简介】Haizhen Lin is an Associate professor of economics in the Business Economics and Public Policy department at Indiana University’s Kelley School of Business. Her primary area of research concerns the U.S. healthcare market and covers topics related to market competition, pricing, quality provision, government intervention, and health information technology. Recently she is working on vertical integration in the hospital setting and mergers across distinct markets in Medicare Advantage. In addition to her principle appointment at Kelley, Haizhen is a faculty research fellow at the National Bureau of Economic Research.

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