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On the Effective Design of the Efficiency Defence


  • Andreea Cosnita

    () (CES - Centre d'économie de la Sorbonne - UP1 - Université Panthéon-Sorbonne - CNRS - Centre National de la Recherche Scientifique)

  • Jean-Philippe Tropeano

    () (CES - Centre d'économie de la Sorbonne - UP1 - Université Panthéon-Sorbonne - CNRS - Centre National de la Recherche Scientifique)


The efficiency defence was long delayed in the European merger control due to costly implementation issues. In this paper we argue that the upstream consequences of the efficiency defence should equally be considered, namely the improvement of the distribution of notified mergers through the incentives it provides towards more efficient mergers. First of all, we show that even if the Competition Authority may not tell apart the mergers that rightfully invoke the efficiency defence from those that do not, allowing such a procedure can lead to a lower post-merger price. Secondly, we study the impact of merger remedies on the incentives conveyed by the efficiency defence, and conclude on the optimal design of the efficiency defence procedure.

Suggested Citation

  • Andreea Cosnita & Jean-Philippe Tropeano, 2006. "On the Effective Design of the Efficiency Defence," Université Paris1 Panthéon-Sorbonne (Post-Print and Working Papers) halshs-00113503, HAL.
  • Handle: RePEc:hal:cesptp:halshs-00113503
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    References listed on IDEAS

    1. Lars-Hendrik Röller & Johan Stennek & Frank Verboven, 2006. "Efficiency Gains from Mergers," Chapters,in: European Merger Control, chapter 3 Edward Elgar Publishing.
    2. repec:hhs:iuiwop:543 is not listed on IDEAS
    3. Lagerlof, Johan N.M. & Heidhues, Paul, 2005. "On the desirability of an efficiency defense in merger control," International Journal of Industrial Organization, Elsevier, vol. 23(9-10), pages 803-827, December.
    4. Motta,Massimo, 2004. "Competition Policy," Cambridge Books, Cambridge University Press, number 9780521016919, March.
    5. Seldeslachts, Jo & Clougherty, Joseph A. & Barros, Pedro Pita, 2007. "Remedy for Now but Prohibit for Tomorrow: The Deterrence Effects of Merger Policy Tools," Discussion Paper Series of SFB/TR 15 Governance and the Efficiency of Economic Systems 218, Free University of Berlin, Humboldt University of Berlin, University of Bonn, University of Mannheim, University of Munich.
    6. Gary S. Becker, 1974. "Crime and Punishment: An Economic Approach," NBER Chapters,in: Essays in the Economics of Crime and Punishment, pages 1-54 National Bureau of Economic Research, Inc.
    7. Barros, Pedro Pita, 2003. "Looking behind the curtain--effects from modernization of European Union competition policy," European Economic Review, Elsevier, vol. 47(4), pages 613-624, August.
    8. Caillaud, Bernard & Duchêne, Anne, 2011. "Patent office in innovation policy: Nobody's perfect," International Journal of Industrial Organization, Elsevier, vol. 29(2), pages 242-252, March.
    9. Besanko, David & Spulber, Daniel F, 1993. "Contested Mergers and Equilibrium Antitrust Policy," Journal of Law, Economics, and Organization, Oxford University Press, vol. 9(1), pages 1-29, April.
    10. Fabienne Ilzkovitz & Roderick Meiklejohn, 2006. "European Merger Control: Do We Need an Efficiency Defence?," Chapters,in: European Merger Control, chapter 2 Edward Elgar Publishing.
    11. Loss, Frederic & Malavolti-Grimal, Estelle & Verge, Thibaud & Berges-Sennou, Fabian, 2008. "European competition policy modernization: From notifications to legal exception," European Economic Review, Elsevier, vol. 52(1), pages 77-98, January.
    12. Jorde, Thomas M & Teece, David J, 1990. "Innovation and Cooperation: Implications for Competition and Antitrust," Journal of Economic Perspectives, American Economic Association, vol. 4(3), pages 75-96, Summer.
    13. Ecer, Sencer, 2005. "A rational expectations critique of merger policy analysis," Economics Letters, Elsevier, vol. 86(1), pages 73-77, January.
    14. Shapiro, Carl & Willig, Robert D, 1990. "On the Antitrust Treatment of Production Joint Ventures," Journal of Economic Perspectives, American Economic Association, vol. 4(3), pages 113-130, Summer.
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    More about this item


    merger remedies; Merger control; efficiency defence; merger remedies.; Contrôle des fusions; procédure d' «efficiency defence»; remèdes des fusions.;

    JEL classification:

    • L41 - Industrial Organization - - Antitrust Issues and Policies - - - Monopolization; Horizontal Anticompetitive Practices
    • K21 - Law and Economics - - Regulation and Business Law - - - Antitrust Law
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design


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