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Information-Sharing Implications of Horizontal Mergers

  • Albert Banal-Esta?l

    ()

We analyze the effects of uncertainty and private information on horizontal mergers. Firms face uncertain demands or costs and receive private signals. They may decide to merge sharing their private information. If the uncertainty parameters are independent and the signals are perfect, uncertainty generates an informational advantage only to the merging firms, increasing merger incentives and decreasing free-riding effects. Thus, mergers become more profitable and stable. These results generalize to the case of correlated parameters if the correlation is not very severe, and for perfect correlation if the firms receive noisy signals. From the normative point of view, mergers are socially less harmful compared to deterministic markets and may even be welfare enhancing. If the signals are, instead, publicly observed, uncertainty does not necessarily give more incentives to merge, and mergers are not always less socially harmful.

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Paper provided by Unitat de Fonaments de l'Anàlisi Econòmica (UAB) and Institut d'Anàlisi Econòmica (CSIC) in its series UFAE and IAE Working Papers with number 544.02.

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Length: 31
Date of creation: 28 Oct 2002
Date of revision:
Handle: RePEc:aub:autbar:544.02
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  1. McAfee, R Preston & Williams, Michael A, 1992. "Horizontal Mergers and Antitrust Policy," Journal of Industrial Economics, Wiley Blackwell, vol. 40(2), pages 181-87, June.
  2. Stennek Johan, 2003. "Horizontal Mergers Without Synergies May Increase Consumer Welfare," The B.E. Journal of Economic Analysis & Policy, De Gruyter, vol. 3(1), pages 1-14, January.
  3. Röller, Lars-Hendrik & Stennek, Johan & Verboven, Frank, 2000. "Efficiency Gains from Mergers," Working Paper Series 543, Research Institute of Industrial Economics.
  4. Salant, Stephen W & Switzer, Sheldon & Reynolds, Robert J, 1983. "Losses from Horizontal Merger: The Effects of an Exogenous Change in Industry Structure on Cournot-Nash Equilibrium," The Quarterly Journal of Economics, MIT Press, vol. 98(2), pages 185-99, May.
  5. Raith, Michael, 1996. "A General Model of Information Sharing in Oligopoly," Journal of Economic Theory, Elsevier, vol. 71(1), pages 260-288, October.
  6. Perry, Martin K & Porter, Robert H, 1985. "Oligopoly and the Incentive for Horizontal Merger," American Economic Review, American Economic Association, vol. 75(1), pages 219-27, March.
  7. Shapiro, Carl, 1986. "Exchange of Cost Information in Oligopoly," Review of Economic Studies, Wiley Blackwell, vol. 53(3), pages 433-46, July.
  8. Xavier Vives, 2002. "Private Information, Strategic Behavior, and Efficiency in Cournot Markets," RAND Journal of Economics, The RAND Corporation, vol. 33(3), pages 361-376, Autumn.
  9. Satya P. Das & Sarbajit Sengupta, 2001. "Asymmetric Information, Bargaining, and International Mergers," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 10(4), pages 565-590, December.
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