IDEAS home Printed from
MyIDEAS: Login to save this paper or follow this series

On the Desirability of an Efficiency Defense in Merger Control

We develop a model in which two firms that have proposed to merge are privately informed about merger-specific efficiencies. This enables the firms to influence the merger control procedure by strategically revealing their information to an antitrust authority. Although the information improves upon the quality of the authority’s decision, the influence activities may be detrimental to welfare if information processing/gathering is excessively costly. Whether this is the case depends on the merger control institution and, in particular, whether it involves an efficiency defense. We derive the optimal institution and provide conditions under which an efficiency defense is desirable. We also discuss the implications for antitrust policy and outline a three-step procedure that takes the influence activities into consideration.

If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.

File URL:
Download Restriction: no

Paper provided by Department of Economics, Royal Holloway University of London in its series Royal Holloway, University of London: Discussion Papers in Economics with number 04/24.

in new window

Length: 38 pages
Date of creation: Oct 2004
Date of revision: Oct 2004
Handle: RePEc:hol:holodi:0424
Contact details of provider: Postal: Egham Hill, Egham, Surrey, TW20 0EX, UK.
Phone: +44 1784-414228
Fax: +44 1784-439534
Web page:

Order Information: Postal: Egham Hill, Egham, Surrey, TW20 0EX, UK.

References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:

as in new window
  1. Röller, Lars-Hendrik & Stennek, Johan & Verboven, Frank, 2000. "Efficiency Gains from Mergers," Working Paper Series 543, Research Institute of Industrial Economics.
  2. Raymond Deneckere & Carl Davidson, 1985. "Incentives to Form Coalitions with Bertrand Competition," RAND Journal of Economics, The RAND Corporation, vol. 16(4), pages 473-486, Winter.
  3. Philippe Aghion & Jean Tirole, 1994. "Normal and Real Authority in Organizations," Working papers 94-13, Massachusetts Institute of Technology (MIT), Department of Economics.
  4. Fabienne Ilzkovitz & Roderick Meiklejohn, 2006. "European Merger Control: Do We Need an Efficiency Defence?," Chapters, in: European Merger Control, chapter 2 Edward Elgar.
  5. Neven, Damien J & Röller, Lars-Hendrik, 2000. "Consumer Surplus vs. Welfare Standard in a Political Economy Model of Merger Control," CEPR Discussion Papers 2620, C.E.P.R. Discussion Papers.
  6. Grossman, Sanford J, 1981. "The Informational Role of Warranties and Private Disclosure about Product Quality," Journal of Law and Economics, University of Chicago Press, vol. 24(3), pages 461-83, December.
  7. Song Shin, H, 1996. "Adversarial and Inquisitorial Procedures in Arbitration," Economics Papers 124, Economics Group, Nuffield College, University of Oxford.
  8. Tracy Lewis & Michel Poitevin, 1995. "Disclosure of Information in Regulatory Proceedings," CIRANO Working Papers 95s-01, CIRANO.
  9. Farrell, Joseph & Shapiro, Carl, 2000. "Scale Economies and Synergies in Horizontal Merger Analysis," Competition Policy Center, Working Paper Series qt8v1500b8, Competition Policy Center, Institute for Business and Economic Research, UC Berkeley.
  10. Farrell, Joseph & Shapiro, Carl, 1988. "Horizontal Mergers: An Equilibrium Analysis," Department of Economics, Working Paper Series qt0tp305nx, Department of Economics, Institute for Business and Economic Research, UC Berkeley.
  11. 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.
  12. Paul R. Milgrom, 1979. "Good Nevs and Bad News: Representation Theorems and Applications," Discussion Papers 407R, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  13. Patrick Legros & Andrew Newman, 2000. "Interference, Contracts and Authority with Insecure Communication," Econometric Society World Congress 2000 Contributed Papers 0650, Econometric Society.
  14. Froeb, Luke M. & Kobayashi, Bruce H., 2001. "Evidence production in adversarial vs. inquisitorial regimes," Economics Letters, Elsevier, vol. 70(2), pages 267-272, February.
  15. Spector, David, 2002. "Horizontal mergers, entry, and efficiency defences," CEPREMAP Working Papers (Couverture Orange) 0206, CEPREMAP.
  16. Fisher, Franklin M, 1987. "Horizontal Mergers: Triage and Treatment," Journal of Economic Perspectives, American Economic Association, vol. 1(2), pages 23-40, Fall.
  17. Lagerlof, Johan, 1997. "Lobbying, information, and private and social welfare," European Journal of Political Economy, Elsevier, vol. 13(3), pages 615-637, September.
  18. Steven Shavell, 1994. "Acquisition and Disclosure of Information Prior to Sale," RAND Journal of Economics, The RAND Corporation, vol. 25(1), pages 20-36, Spring.
  19. Andrei Medvedev, 2004. "Efficiency Defense and Administrative Fuzziness in Merger Regulation," CERGE-EI Working Papers wp234, The Center for Economic Research and Graduate Education - Economics Institute, Prague.
  20. Daughety, Andrew F & Reinganum, Jennifer F, 2000. "On the Economics of Trials: Adversarial Process, Evidence, and Equilibrium Bias," Journal of Law, Economics and Organization, Oxford University Press, vol. 16(2), pages 365-94, October.
  21. Tullock, Gordon, 1975. "On the Efficient Organization of Trials," Kyklos, Wiley Blackwell, vol. 28(4), pages 745-62.
  22. Jean-Jacques Laffont & Jean Tirole, 1993. "A Theory of Incentives in Procurement and Regulation," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262121743, June.
Full references (including those not matched with items on IDEAS)

This item is not listed on Wikipedia, on a reading list or among the top items on IDEAS.

When requesting a correction, please mention this item's handle: RePEc:hol:holodi:0424. See general information about how to correct material in RePEc.

For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Claire Blackman)

The email address of this maintainer does not seem to be valid anymore. Please ask Claire Blackman to update the entry or send us the correct address

If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

If references are entirely missing, you can add them using this form.

If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.

If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.

Please note that corrections may take a couple of weeks to filter through the various RePEc services.

This information is provided to you by IDEAS at the Research Division of the Federal Reserve Bank of St. Louis using RePEc data.