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Tacit Collusion, Firm Asymmetries and Numbers: Evidence from EC Merger Cases

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Author Info
Stephen Davies () (Centre for Competition Policy, University of East Anglia)
Matthew Olczak () (Centre for Competition Policy, University of East Anglia)
Heather Coles

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Abstract

The purpose of this paper is to identify empirically the implicit structural model, especially the roles of size asymmetries and concentration, used by the European Commission to identify mergers with coordinated effects (i.e. collective dominance). Apart from its obvious policy-relevance, the paper is designed to shed empirical light on the condition under which tacit collusion is most likely. We construct a database relating to 62 candidate mergers and find that, in the eyes of the Commission, tacit collusion in this context virtually never involves more than two firms and requires close symmetry in the market shares of the two firms.

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Publisher Info
Paper provided by Centre for Competition Policy, University of East Anglia in its series Working Papers with number 07-7.

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Length: 38 pages
Date of creation: Mar 2007
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Handle: RePEc:ccp:wpaper:wp07-07

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Related research
Keywords: Tacit collusion; collective dominance; coordinated effects; European mergers; asymmetries;

Find related papers by JEL classification:
L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
L41 - Industrial Organization - - Antitrust Issues and Policies - - - Monopolization; Horizontal Anticompetitive Practices

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Cited by:
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  1. Bruce Lyons, 2008. "An Economic Assessment of EC Merger Control: 1957–2007," Working Papers 08-17, Centre for Competition Policy, University of East Anglia. [Downloadable!]
  2. Stephen Davies & Matthew Olczak, 2008. "Assessing the Efficacy of Structural Merger Remedies: Choosing Between Theories of Harm?," Working Papers 08-28, Centre for Competition Policy, University of East Anglia. [Downloadable!]
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