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Entry and Exit Event Analysis


Paul A. Johnson


Bates White, LLC

April 1, 2008

ISSUES IN COMPETITION LAW AND POLICY, Vol. 2, p. 1385, Chapter 58, ABA Section of Antitrust Law, 2008

Abstract:     
Economists have analyzed incumbent responses to entry and exit by competitors as probative of competitive effects in several recent high profile mergers. This chapter argues that an incumbent's response to entry or exit may be probative of competitive effects of merger because these responses reveal whether premerger pricing is competitive and, therefore, whether the elimination of one competitive constraint through merger is likely to change competitive outcomes. This interpretation contrasts with the more common interpretation that simulates postmerger prices by equating the effects of entry and exit with merger. Such simulation may either overstate or understate the effects of merger, depending on the circumstances. This chapter also considers two types of issues that may arise in entry and exit event analysis. The first is in the interpretation of the estimated causal effects of entry and exit on incumbents. The second is in the estimation of these effects.

Number of Pages in PDF File: 19

Keywords: Merger, Natural experiments

JEL Classification: K21, L4

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Date posted: April 2, 2008 ; Last revised: May 31, 2009

Suggested Citation

Johnson, Paul A., Entry and Exit Event Analysis (April 1, 2008). ISSUES IN COMPETITION LAW AND POLICY, Vol. 2, p. 1385, Chapter 58, ABA Section of Antitrust Law, 2008. Available at SSRN: http://ssrn.com/abstract=1115861 or http://dx.doi.org/10.2139/ssrn.1115861

Contact Information

Paul A. Johnson (Contact Author)
Bates White, LLC ( email )
1300 Eye St NW
Suite 600E
Washington, DC 20005
United States
202-747-1439 (Phone)
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