Strategic Entry Deterrence and the Behavior of Pharmaceutical Incumbents Prior to Patent Expiration

Glenn Ellison () and Sara Fisher Ellison

American Economic Journal: Microeconomics, 2011, vol. 3, issue 1, pages 1-36

Abstract: This paper develops a new approach to testing for strategic entry deterrence and applies it to the behavior of pharmaceutical incumbents before patent expiration. It examines a cross section of markets, determining whether behavior is nonmonotonic in market size. Under some conditions, investment levels will be monotone in market size if firms do not invest to deter entry. Strategic investments to deter entry, however, may result in nonmonotonic investment because they are unnecessary in small markets, and impossible in large ones. Consistent with an entry-deterrence motivation is the finding that incumbents in medium-sized markets advertise less prior to patent expiration. (JEL D92, G31, L11, L21, L65)

JEL-codes: D92 G31 L11 L21 L65 (search for similar items in EconPapers)
Date: 2011
Note: DOI: 10.1257/mic.3.1.1
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Related works:
Working Paper: Strategic Entry Deterrence and the Behavior of Pharmaceutical Incumbents Prior to Patent Expiration (2007)
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