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On the Use of the Log CAR Measure in Event Studies

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  • Gishan Dissanaike
  • Alexandre Le Fur

Abstract

Cross-sectional averages of log returns have been used to measure shareholder wealth effects in several event studies. No adequate explanation of the implied portfolio strategy has ever been provided in the literature. We argue that the method is biased or does not portray a realistic portfolio strategy. It should therefore be used with caution in the event-study' literature. Copyright Blackwell Publishers Ltd, 2003.

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  • Gishan Dissanaike & Alexandre Le Fur, 2003. "On the Use of the Log CAR Measure in Event Studies," Journal of Business Finance & Accounting, Wiley Blackwell, vol. 30, pages 1165-1170.
  • Handle: RePEc:bla:jbfnac:v:30:y:2003-09:i::p:1165-1170
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    Cited by:

    1. Hudson, Robert S. & Gregoriou, Andros, 2015. "Calculating and comparing security returns is harder than you think: A comparison between logarithmic and simple returns," International Review of Financial Analysis, Elsevier, vol. 38(C), pages 151-162.
    2. Sebastian Dickgiesser & Christoph Kaserer, 2010. "Market Efficiency Reloaded: Why Insider Trades do not Reveal Exploitable Information," German Economic Review, Verein für Socialpolitik, vol. 11, pages 302-335, August.

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