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Do Antitrust Laws Facilitate Collusion? Experimental Evidence on Costly Communication in Duopolies

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Author Info
Andersson, Ola () (Department of Economics, Lund University)
Wengström, Erik () (Department of Economics, Lund University)

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Abstract

Using Bertrand supergames with communication, we study price formation and stability of collusive agreements on experimental duopoly markets. The experimental design consists of three treatments with different costs of communication: zero-cost, low-cost and high-cost. We find that increasing the cost of communication results in a significantly higher price level. Moreover, making communication costly decreases the number of messages, but more importantly, it enhances the stability of collusive agreements. By letting the cost of communication symbolize the presence of an antitrust law that prohibits firms from discussing prices, McCutcheon (1997) presents an interesting application to antitrust policy. The experimental results support her theoretical prediction that antitrust laws might work in the interest of firms.

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Publisher Info
Paper provided by Lund University, Department of Economics in its series Working Papers with number 2004:14.

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Length: 41 pages
Date of creation: 13 Apr 2004
Date of revision: 13 Sep 2004
Publication status: Forthcoming in The Scandinavian Journal of Economics.
Handle: RePEc:hhs:lunewp:2004_014

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Postal: Department of Economics, School of Economics and Management, Lund University, Box 7082, S-220 07 Lund,Sweden
Phone: +46 +46 222 0000
Fax: +46 +46 2224613
Web page: http://www.nek.lu.se/
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Related research
Keywords: Antitrust Policy; Experiments; Collusion; Costly Communication; Weakly Renegotiation-proof Equilibria;

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Find related papers by JEL classification:
C90 - Mathematical and Quantitative Methods - - Design of Experiments - - - General
D43 - Microeconomics - - Market Structure and Pricing - - - Oligopoly and Other Forms of Market Imperfection
L40 - Industrial Organization - - Antitrust Issues and Policies - - - General

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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.:
  1. Gary Charness & Martin Dufwenberg, 2006. "Promises and Partnership," Econometrica, Econometric Society, vol. 74(6), pages 1579-1601, November. [Downloadable!] (restricted)
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  2. Dufwenberg, Martin & Gneezy, Uri, 2002. "Information disclosure in auctions: an experiment," Journal of Economic Behavior & Organization, Elsevier, vol. 48(4), pages 431-444, August. [Downloadable!] (restricted)
  3. Camerer, Colin F. & Hogarth, Robin M., 1999. "The Effects of Financial Incentives in Experiments: A Review and Capital-Labor-Production Framework," Working Papers 1059, California Institute of Technology, Division of the Humanities and Social Sciences. [Downloadable!]
  4. Douglas Bernheim, B. & Ray, Debraj, 1989. "Collective dynamic consistency in repeated games," Games and Economic Behavior, Elsevier, vol. 1(4), pages 295-326, December. [Downloadable!] (restricted)
  5. Tore Ellingsen & Magnus Johannesson, 2004. "Promises, Threats and Fairness," Economic Journal, Royal Economic Society, vol. 114(495), pages 397-420, 04. [Downloadable!] (restricted)
  6. Evans, Robert & Maskin, Eric, 1989. "Efficient renegotiation--proof equilibria in repeated games," Games and Economic Behavior, Elsevier, vol. 1(4), pages 361-369, December. [Downloadable!] (restricted)
  7. Farrell, Joseph & Maskin, Eric, 1989. "Renegotiation in repeated games," Games and Economic Behavior, Elsevier, vol. 1(4), pages 327-360, December. [Downloadable!] (restricted)
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Cited by:
(explanations, 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.)

  1. Zhongmin Wang, 2008. "Collusive Communication and Pricing Coordination in a Retail Gasoline Market," Review of Industrial Organization, Springer, vol. 32(1), pages 35-52, February. [Downloadable!] (restricted)
  2. Leufkens, Kasper & Peeters, Ronald, 2008. "Price dynamics and collusion under short-run price commitments," Research Memoranda 052, Maastricht : METEOR, Maastricht Research School of Economics of Technology and Organization. [Downloadable!]
  3. Andersson, Ola & Carlsson, Hans & Holm, Håkan, 2006. "Endogenous Communication and Tacit Coordination in Market Entry Games - An explorative experimental study," Working Papers 2006:12, Lund University, Department of Economics. [Downloadable!]
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