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Ex post or ex ante? On the optimal timing of merger control

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  • Andreea Cosnita-Langlais
  • Jean-Philippe Tropeano

Abstract

We study the optimal timing of merger control by comparing the pre-and post closing enforcement. Mergers have both pro- and anticompetitive effects, and the parties’(the agency and the merging firms) veri able information on them is endogenous: it depends on the timing of the merger control, as well as on some investment in evidence production. The ex post enforcement turns out optimal whenever the costs of providing veri able information on both efficiency gains and market power are sufficiently low, regardless of whether the fi rms know ex ante or not their true merger type.

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File URL: http://economix.fr/pdf/dt/2013/WP_EcoX_2013-22.pdf
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Bibliographic Info

Paper provided by University of Paris West - Nanterre la Défense, EconomiX in its series EconomiX Working Papers with number 2013-22.

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Length: 26 pages
Date of creation: 2013
Date of revision:
Handle: RePEc:drm:wpaper:2013-22

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Keywords: merger control; competition policy; evidence production;

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  1. Frederic Loss & Estelle Malavolti-Grimal & Thibaud Vergé & Fabian Berges, 2008. "European competition policy modernization: from notification to legal exception," Working Papers 22644, Institut National de la Recherche Agronomique, France.
  2. Johan N. M. Lagerlöf & Paul Heidhues, 2004. "On the Desirability of an Efficiency Defense in Merger Control," Royal Holloway, University of London: Discussion Papers in Economics 04/24, Department of Economics, Royal Holloway University of London, revised Oct 2004.
  3. Choe, Chongwoo & Shekhar, Chander, 2010. "Compulsory or voluntary pre-merger notification? Theory and some evidence," International Journal of Industrial Organization, Elsevier, vol. 28(1), pages 10-20, January.
  4. Ottaviani, Marco & Wickelgren, Abraham L., 2011. "Ex ante or ex post competition policy? A progress report," International Journal of Industrial Organization, Elsevier, vol. 29(3), pages 356-359, May.
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