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Misspecification of the market model: the implications for event studies

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  • J. Andrew Coutts
  • Terence Mills
  • Jennifer Roberts

Abstract

Event studies are increasingly found in the applied finance literature. They are employed to analyse the market reaction to events and thus to investigate market efficiency. The paper is concerned with misspecification testing of the single-index market model which is conventionally employed to generate returns within the event-study method. Weekly data from the constituents of the FT-SE 100 are used in order to subject the single-index market model to rigorous misspecification tests. It is concluded that misspecification is endemic in the market model and that this is likely to lead to incorrect estimation of abnormal returns, and therefore erroneous conclusions concerning the market impact of the event in question.

Suggested Citation

  • J. Andrew Coutts & Terence Mills & Jennifer Roberts, 1995. "Misspecification of the market model: the implications for event studies," Applied Economics Letters, Taylor & Francis Journals, vol. 2(5), pages 163-165.
    • Handle: RePEc:taf:apeclt:v:2:y:1995:i:5:p:163-165
    DOI: 10.1080/135048595357528
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    Citations

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    Cited by:

    1. DAVID E. ALLEN & MICHAEL McALEER & ROBERT J. POWELL & ABHAY K. SINGH, 2018. "Non-Parametric Multiple Change Point Analysis Of The Global Financial Crisis," Annals of Financial Economics (AFE), World Scientific Publishing Co. Pte. Ltd., vol. 13(02), pages 1-23, June.
    2. Aybar, Bülent & Thanakijsombat, Thanarerk, 2015. "Financing decisions and gains from cross-border acquisitions by emerging-market acquirers," Emerging Markets Review, Elsevier, vol. 24(C), pages 69-80.
    3. Raphael Markellos & Terence Mills, 2003. "Asset pricing dynamics," The European Journal of Finance, Taylor & Francis Journals, vol. 9(6), pages 533-556.
    4. João Duque & Inês Pinto, 2008. "Regulatory disclosure via the internet: does it make financial markets more efficient?," Journal of Regulatory Economics, Springer, vol. 33(1), pages 5-19, February.
    5. Cable, J & Holland, K, 1996. "Modelling Normal Returns in Event Studies: A Model-Selection Approach and Pilot Study," Working Papers 96-13, University of Wales, Aberystwyth, Department of Economics.
    6. J. Cable & K. Holland, 1999. "Modelling normal returns in event studies: a model-selection approach and pilot study," The European Journal of Finance, Taylor & Francis Journals, vol. 5(4), pages 331-341.
    7. Aristeidis Samitas & Dimitris Kenourgios & Peter Zounis, 2008. "Athens' Olympic Games 2004 impact on sponsors' stock returns," Applied Financial Economics, Taylor & Francis Journals, vol. 18(19), pages 1569-1580.
    8. Gavalas, Dimitris & Syriopoulos, Theodoros & Tsatsaronis, Michael, 2022. "COVID–19 impact on the shipping industry: An event study approach," Transport Policy, Elsevier, vol. 116(C), pages 157-164.
    9. Alberto Barroso Del Toro & Laura Vivas Crisol & Xavier Tort-Martorell, 2022. "The Sustainability Narrative: A Multi Study Using Event Studies to Analyse the American Energy Companies Shareholder’s Reaction to Sustainability News," IJERPH, MDPI, vol. 19(23), pages 1-17, November.

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