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Mergers in Regulated Industries: The Uses and Abuses of Event Studies

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  • Cox, Alan J
  • Portes, Jonathan

Abstract

Merging utilities are frequently required to share the economic benefits of a merger with ratepayers. These benefits are often measured using stock price movements at the time of the merger announcement. While event studies of this sort can be a powerful and appropriate tool, improper application and interpretation can lead to misleading conclusions. In this paper, we review the basic event study approach to merger evaluation and discuss some of the complicating factors. We describe both flawed and correctly done event studies submitted in the merger application of SBC Communications and Pacific Telesis and some additional case studies. Copyright 1998 by Kluwer Academic Publishers

Suggested Citation

  • Cox, Alan J & Portes, Jonathan, 1998. "Mergers in Regulated Industries: The Uses and Abuses of Event Studies," Journal of Regulatory Economics, Springer, vol. 14(3), pages 281-304, November.
  • Handle: RePEc:kap:regeco:v:14:y:1998:i:3:p:281-304
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    Citations

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    Cited by:

    1. Warell, Linda, 2007. "A horizontal merger in the iron ore industry: An event study approach," Resources Policy, Elsevier, vol. 32(4), pages 191-204, December.
    2. John J. García & Francesc Trillas, 2013. "European energy industry shocks, corporate control and firms' value," DOCUMENTOS DE TRABAJO CIEF 010928, UNIVERSIDAD EAFIT.
    3. John García & Francesc Trillas, 2011. "Control corporativo y riqueza de los accionistas en el sector eléctrico europeo (2000-2007)," Revista de Economía Institucional, Universidad Externado de Colombia - Facultad de Economía, vol. 13(25), pages 297-319, July-Dece.
    4. Goran Serdareviæ & Petr Teplý, 2011. "The Efficiency of EU Merger Control During the Period 1990–2008," Czech Journal of Economics and Finance (Finance a uver), Charles University Prague, Faculty of Social Sciences, vol. 61(3), pages 252-276, July.
    5. Oliveira Cruz, Carlos & Miranda Sarmento, Joaquim, 2017. "Horizontal bundling of infrastructure managers: The case of Portugal Infrastructure Company (roads and railways)," Transport Policy, Elsevier, vol. 55(C), pages 99-103.
    6. 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.
    7. Albert Banal‐Estañol & Paul Heidhues & Rainer Nitsche & Jo Seldeslachts, 2010. "Screening And Merger Activity," Journal of Industrial Economics, Wiley Blackwell, vol. 58(4), pages 794-817, December.
    8. Buckland, Roger & Fraser, Patricia, 2002. "The scale and patterns of abnormal returns to equity investment in UK electricity distribution," Global Finance Journal, Elsevier, vol. 13(1), pages 39-62.
    9. John Kwoka, Chengyan Gu, . "Predicting Merger Outcomes: The Accuracy of Stock Market Event Studies, Market Structure Characteristics, and Agency Decisions," Journal of Law and Economics, University of Chicago Press, vol. 58(3).
    10. John Jackson & Audrey Kline & Sarah Skinner, 2006. "The Impact of Non-Normality and Misspecification on Merger Event Studies," International Journal of the Economics of Business, Taylor & Francis Journals, vol. 13(2), pages 247-264.
    11. Fiocco, Raffaele & Guo, Dongyu, 2014. "Mergers between regulated firms with unknown efficiency gains," Discussion Paper Series of SFB/TR 15 Governance and the Efficiency of Economic Systems 464, Free University of Berlin, Humboldt University of Berlin, University of Bonn, University of Mannheim, University of Munich.
    12. Frederick Warren-Boulton & Serdar Dalkir, 2001. "Staples and Office Depot: An Event-Probability Case Study," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 19(4), pages 467-479, December.
    13. Fotis, Panagiotis & Pekka, Victoria & Polemis, Michael, 2015. "Intervalling-effect bias and evidences for competition policy," MPRA Paper 63211, University Library of Munich, Germany.
    14. Raffaele Fiocco & Dongyu Guo, 2015. "Mergers between regulated firms with unknown efficiency gains," Review of Economic Design, Springer;Society for Economic Design, vol. 19(4), pages 299-326, December.
    15. Lina M. Cortés & John J. García & David Agudelo, 2015. "Effects of Mergers and Acquisitions on Shareholder Wealth: Event Study for Latin American Airlines," DOCUMENTOS DE TRABAJO CIEF 012453, UNIVERSIDAD EAFIT.

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