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Event Studies and the Analysis of Antitrust

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Author Info

  • Michael Cichello
  • Douglas Lamdin

Abstract

A standard tool in economics and finance is the event study in which one examines the impact of an event on stock returns. While hundreds of such studies have been published, the concern here is with a small subset: the use of event studies to examine antitrust issues. After a brief review of the event study technique, we provide a review of the literature that is the nexus of event studies and antitrust. The goal is to not only chronicle the development of this literature and highlight the major findings, but also to comment on important issues concerning implementation of this research method and the interpretation of the results.

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File URL: http://www.tandfonline.com/10.1080/13571510600784557
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Bibliographic Info

Article provided by Taylor & Francis Journals in its journal International Journal of the Economics of Business.

Volume (Year): 13 (2006)
Issue (Month): 2 ()
Pages: 229-245

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Handle: RePEc:taf:ijecbs:v:13:y:2006:i:2:p:229-245

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Related research

Keywords: Antitrust; Empirical Methods; Event Studies;

References

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.:
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  1. Aktas, Nihat & de Bodt, Eric & Roll, Richard, 2004. "Market Response to European Regulation of Business Combinations," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 39(04), pages 731-757, December.
  2. Eckbo, B Espen & Maksimovic, Vojislav & Williams, Joseph, 1990. "Consistent Estimation of Cross-Sectional Models in Event Studies," Review of Financial Studies, Society for Financial Studies, vol. 3(3), pages 343-65.
  3. Robert W. Crandall & Clifford Winston, 2003. "Does Antitrust Policy Improve Consumer Welfare? Assessing the Evidence," Journal of Economic Perspectives, American Economic Association, vol. 17(4), pages 3-26, Fall.
  4. Eckbo, B Espen & Wier, Peggy, 1985. "Antimerger Policy under the Hart-Scott-Rodino Act: A Reexamination of the Market Power Hypothesis," Journal of Law and Economics, University of Chicago Press, vol. 28(1), pages 119-49, April.
  5. Garbade, Kenneth D & Silber, William L & White, Lawrence J, 1982. "Market Reaction to the Filing of Antitrust Suits: An Aggregate and Cross-Sectional Analysis," The Review of Economics and Statistics, MIT Press, vol. 64(4), pages 686-91, November.
  6. Bizjak, John M & Coles, Jeffrey L, 1995. "The Effect of Private Antitrust Litigation on the Stock-Market Valuation of the Firm," American Economic Review, American Economic Association, vol. 85(3), pages 436-61, June.
  7. Boardman, Anthony & Vertinsky, Ilan & Whistler, Diana, 1997. "Using information diffusion models to estimate the impacts of regulatory events on publicly traded firms," Journal of Public Economics, Elsevier, vol. 63(2), pages 283-300, January.
  8. Eckbo, B Espen, 1992. " Mergers and the Value of Antitrust Deterrence," Journal of Finance, American Finance Association, vol. 47(3), pages 1005-29, July.
  9. Bosch, Jean-Claude & Eckard, E Woodrow, Jr, 1991. "The Profitability of Price Fixing: Evidence from Stock Market Reaction to Federal Indictments," The Review of Economics and Statistics, MIT Press, vol. 73(2), pages 309-17, May.
  10. Ajeyo Banerjee & E. Woodrow Eckard, 1998. "Are Mega-Mergers Anticompetitive? Evidence from the First Great Merger Wave," RAND Journal of Economics, The RAND Corporation, vol. 29(4), pages 803-827, Winter.
  11. Brady, Una & M. Feinberg, Robert, 2000. "An examination of stock-price effects of EU merger control policy," International Journal of Industrial Organization, Elsevier, vol. 18(6), pages 885-900, August.
  12. McAfee, R. Preston & Williams, Michael A., 1988. "Can event studies detect anticompetitive mergers?," Economics Letters, Elsevier, vol. 28(2), pages 199-203.
  13. Scott E. Hein, 2004. "Improving Tests of Abnormal Returns by Bootstrapping the Multivariate Regression Model with Event Parameters," Journal of Financial Econometrics, Society for Financial Econometrics, vol. 2(3), pages 451-471.
  14. Larcker, David F. & Gordon, Lawrence A. & Pinches, George E., 1980. "Testing for Market Efficiency: A Comparison of the Cumulative Average Residual Methodology and Intervention Analysis," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 15(02), pages 267-287, June.
  15. Lamdin, Douglas J., 2001. "Implementing and interpreting event studies of regulatory changes," Journal of Economics and Business, Elsevier, vol. 53(2-3), pages 171-183.
  16. Bittlingmayer, George & Hazlett, Thomas W., 2000. "DOS Kapital: Has antitrust action against Microsoft created value in the computer industry?," Journal of Financial Economics, Elsevier, vol. 55(3), pages 329-359, March.
  17. Eckbo, B. Espen, 1983. "Horizontal mergers, collusion, and stockholder wealth," Journal of Financial Economics, Elsevier, vol. 11(1-4), pages 241-273, April.
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Citations

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Cited by:
  1. Haji Ali Beigi, Maryam & Budzinski, Oliver, 2012. "On the use of event studies to evaluate economic policy decisions: A note of caution," Ilmenau Economics Discussion Papers 80, Ilmenau University of Technology, Institute of Economics.
  2. Ralph M. Sonenshine, 2009. "Effect of Research and Development and Market Concentration on Merger Outcomes -- An Event Study of U.S. Horizontal Mergers," Working Papers 2009-16 JEL classificatio, American University, Department of Economics.
  3. Panagiotis Fotis & Michael Polemis & Nikolaos Zevgolis, 2011. "Robust Event Studies for Derogation from Suspension of Concentrations in Greece during the Period 1995–2008," Journal of Industry, Competition and Trade, Springer, vol. 11(1), pages 67-89, March.

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