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Using Event Studies to Assess the Impact of Unexpected Events

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  • James V Koch
  • Robert N Fenili

Abstract

The quantitative assessment of the financial impact of unexpected events is the realm of the “event study.” We examine how CEOs, boards, and public policymakers can utilize event studies to inform and improve their decision making. The breadth of application of event studies is surprisingly broad and ranges from situations involving the death of a CEO to emergency product recalls. We present illustrative event studies for two Steve Jobs-related announcements concerning his health in order to demonstrate both the potential and limitations of the technique.

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  • James V Koch & Robert N Fenili, 2013. "Using Event Studies to Assess the Impact of Unexpected Events," Business Economics, Palgrave Macmillan;National Association for Business Economics, vol. 48(1), pages 58-66, February.
    • Handle: RePEc:pal:buseco:v:48:y:2013:i:1:p:58-66
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    Cited by:

    1. Tarek Ibrahim Eldomiaty & Marwa Anwar & Nebal Magdy & Mohamed Nabil Hakam, 2020. "Robust examination of political structural breaks and abnormal stock returns in Egypt," Future Business Journal, Springer, vol. 6(1), pages 1-9, December.
    2. Mugebe, P. & Kizil, M.S. & Yahyaei, M. & Low, R., 2023. "Foundation of a framework for evaluating the impact of mining technological innovation on a company's market value," Resources Policy, Elsevier, vol. 85(PA).
    3. Jair Santillán‐Saldivar & Tobias Gaugler & Christoph Helbig & Andreas Rathgeber & Guido Sonnemann & Andrea Thorenz & Axel Tuma, 2021. "Design of an endpoint indicator for mineral resource supply risks in life cycle sustainability assessment: The case of Li‐ion batteries," Journal of Industrial Ecology, Yale University, vol. 25(4), pages 1051-1062, August.

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