Working Paper No. 542

Why Event Studies Do Not Detect Anti-Competitive Mergers

Published: December 14, 2000Pages: 8Keywords: Mergers & Acquisitions; Event Studies; Antitrust; Coalition FormationJEL-codes: G14; G34; L12; L41

Why Event Studies Do Not Detect Anti-Competitive Mergers Sven-Olof Fridolfsson and Johan Stennek


Anticompetitive mergers increase competitors' profits, since they reduce competition. Using a model of endogenous mergers, we show that such mergers nevertheless may reduce the competitors' share-prices. Thus, event-studies can not detect anti-competitive mergers.

Interdisciplinary European Studies

The European Union in a Changing World Order

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This book explores how the European Union responds to the ongoing challenges to the liberal international order. These challenges arise both within the EU itself and beyond its borders, and put into question the values of free trade and liberal democracy. 

About the book

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