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Quantifying the Scope for Efficiency Defense in Merger Control: The Werden-Froeb-Index

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Listed:
  • Goppelsroeder, M.

    (Graduate Institute of International Studies, Geneva)

  • Schinkel, M.P.

    () (Universiteit van Amsterdam)

  • Tuinstra, J.

    (Universiteit van Amsterdam)

Abstract

In both US and EU merger control, merger-specific efficiencies are recognized as a possible defense for horizontal mergers that raise competition concerns. We introduce the Werden-Froeb-index (WFI) to assist in evaluating these efficiencies. The index measures the average reduction in marginal costs required to restore pre-merger equilibrium prices and quantities after the merger is consummated. It has low information requirements and can deal with any number of firms in price- or quantity-competition merging fully or partially, and a large class of demand and cost functions. We show how the WFI complements Phase I merger inquiries as a screening mechanism.

Suggested Citation

  • Goppelsroeder, M. & Schinkel, M.P. & Tuinstra, J., 2006. "Quantifying the Scope for Efficiency Defense in Merger Control: The Werden-Froeb-Index," CeNDEF Working Papers 06-09, Universiteit van Amsterdam, Center for Nonlinear Dynamics in Economics and Finance.
  • Handle: RePEc:ams:ndfwpp:06-09
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    References listed on IDEAS

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    Cited by:

    1. Baltzopoulos, Apostolos & Kim, Jaewon & Mandorff, Martin, 2015. "UPP Analysis in Five Recent Merger Cases," Konkurrensverket Working Paper Series in Law and Economics 2015:3, Konkurrensverket (Swedish Competition Authority).
    2. Duarte Brito & António Osório & Ricardo Ribeiro & Hélder Vasconcelos, 2015. "Unilateral Effects Screens for Partial Horizontal Acquisitions: The Generalized HHI and GUPPI," Working Papers de Economia (Economics Working Papers) 02, Católica Porto Business School, Universidade Católica Portuguesa.
    3. Brito, Duarte & Ribeiro, Ricardo & Vasconcelos, Helder, 2013. "Quantifying the Coordinated Effects of Partial Horizontal Acquisitions," CEPR Discussion Papers 9536, C.E.P.R. Discussion Papers.
    4. Farrell Joseph & Shapiro Carl, 2010. "Antitrust Evaluation of Horizontal Mergers: An Economic Alternative to Market Definition," The B.E. Journal of Theoretical Economics, De Gruyter, vol. 10(1), pages 1-41, March.
    5. Emilie Dargaud, 2013. "Horizontal mergers, efficiency gains and remedies," European Journal of Law and Economics, Springer, vol. 36(2), pages 349-372, October.
    6. Oscar De la garza & Daniel Flores, 2015. "Equivalent tests for mergers in homogeneous goods industries," Economics Bulletin, AccessEcon, vol. 35(2), pages 1379-1382.
    7. Bos Jaap W.B. & Ling Chan Yee & Kolari James W & Yuan Jiang, 2010. "Competition and Critical Mass," Research Memorandum 063, Maastricht University, Maastricht Research School of Economics of Technology and Organization (METEOR).

    More about this item

    JEL classification:

    • L10 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - General
    • L40 - Industrial Organization - - Antitrust Issues and Policies - - - General
    • C43 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods: Special Topics - - - Index Numbers and Aggregation

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