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Does Shareholder Activism Create Value? A Meta-Analysis

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  • Bajzík, Josef
  • Havranek, Tomas
  • Irsova, Zuzana
  • Novak, Jiri

Abstract

We conduct a meta-analysis of 1,973 estimates of stock price responses to shareholder activism reported in 67 primary studies. We document publication bias in the literature. Corrected activism effects range from 0% to 1.5%. Effects are stronger when shareholder rights are better protected and when stock markets are smaller. Markets respond more positively to activism by individual investors, confrontational activism, and activism aimed at company sale. Estimates based on longer periods, simpler risk-adjustment approaches, more recent and longer datasets, as well as those published in more reputable journals tend to be larger.

Suggested Citation

  • Bajzík, Josef & Havranek, Tomas & Irsova, Zuzana & Novak, Jiri, 2023. "Does Shareholder Activism Create Value? A Meta-Analysis," CEPR Discussion Papers 18233, C.E.P.R. Discussion Papers.
    • Handle: RePEc:cpr:ceprdp:18233
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    JEL classification:

    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading
    • G30 - Financial Economics - - Corporate Finance and Governance - - - General
    • G34 - Financial Economics - - Corporate Finance and Governance - - - Mergers; Acquisitions; Restructuring; Corporate Governance
    • L20 - Industrial Organization - - Firm Objectives, Organization, and Behavior - - - General

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