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Does Mandatory Shareholder Voting Prevent Bad Acquisitions?

Review of Financial Studies 2016 29(11), 3035-3067
Shareholder voting on corporate acquisitions is controversial. In most countries, acquisition decisions are delegated to boards, and shareholder approval is discretionary, which makes existing empirical studies inconclusive. We study the U.K. setting in which shareholder approval is imposed exogenously via a threshold test that provides strong identification. U.K. shareholders gain 8 cents per dollar at announcement with mandatory voting, or 13.6 billion over 1992-2010 in aggregate; without voting, U.K. shareholders lost 3 billion. Multidimensional regression discontinuity analysis supports a causal interpretation. The evidence suggests that mandatory voting imposes a binding constraint on acquirer chief executive officers.

Returns to Shareholder Activism: Evidence from a Clinical Study of the Hermes UK Focus Fund

Review of Financial Studies 2009 23(3), 3093-3129
[This article reports a unique analysis of private engagements by an activist fund. It is based on data made available to us by Hermes, the fund manager owned by the British Telecom Pension Scheme, on engagements with management in companies targeted by its UK Focus Fund. In contrast with most previous studies of activism, we report that the fund executes shareholder activism predominantly through private interventions that would be unobservable in studies purely relying on public information. The fund substantially outperforms benchmarks and we estimate that abnormal returns are largely associated with engagements rather than stock picking.]

Returns to Hedge Fund Activism: An International Study

Review of Financial Studies 2017 30(9), 2933-2971
This paper provides evidence on the incidence, characteristics, and performance of activist engagements across countries. We find that the incidence of activism is greatest with high institutional ownership, particularly for U.S. institutions. We use a sample of 1,740 activist engagements across 23 countries and find that almost one-quarter of engagements are by multi-activists engaging the same target. These engagements perform strikingly better than single activist engagements. Engagement outcomes, such as board changes and takeovers, vary across countries and significantly contribute to the returns to activism. Japan is an exception, with high initial expectations and low outcomes.

Where do firms incorporate? Deregulation and the cost of entry

Journal of Corporate Finance 2008 14(3), 241-256
We study how deregulation of corporate law affects the decision of entrepreneurs of where to incorporate. Recent rulings by the European Court of Justice (ECJ) have enabled entrepreneurs to select their country of incorporation independently of their real seat. We analyze foreign incorporations in the U.K., where incorporations of limited liability companies can be arranged at low cost. Using data for over 2 million companies from around the world incorporating in the U.K., we find a large increase in cross-country incorporations from E.U. Member States following the ECJ rulings. In line with regulatory cost theories, incorporations are primarily driven by minimum capital requirements and setup costs in home countries. We record widespread use of special incorporation agents to facilitate legal mobility across countries.

Does Mandatory Shareholder Voting Prevent Bad Acquisitions?

Review of Financial Studies 2016 29(11), 3035-3067
Can shareholder voting prevent managers from destroying value in corporate acquisitions? Previous studies based on U.S. data are inconclusive because shareholder approval is discretionary. We study the U.K. where approval is mandatory for deals exceeding a multivariate relative-size threshold. We find that in the U.K. shareholders gain 8 cents per dollar at announcement with mandatory voting, or $13.6 billion over 1992-2010 in aggregate; without voting, U.K. shareholders lost $3 billion. U.S. shareholders lost $214 billion in matched deals. Differences-in-differences and multidimensional regression discontinuity analyses support a causal interpretation. Our evidence suggests that mandatory voting imposes a binding constraint on acquirer CEOs.

Returns to Hedge Fund Activism: An International Study

Review of Financial Studies 2017 30(9), 2933-2971 open access
This paper provides evidence on the incidence, characteristics, and performance of activist engagements across countries. We find that the incidence of activism is greatest with high institutional ownership, particularly for U.S. institutions. We use a sample of 1,740 activist engagements across 23 countries and find that almost one-quarter of engagements are by multi-activists engaging the same target. These engagements perform strikingly better than single activist engagements. Engagement outcomes, such as board changes and takeovers, vary across countries and significantly contribute to the returns to activism. Japan is an exception, with high initial expectations and low outcomes.

The Benefits of Access: Evidence from Private Meetings with Portfolio Firms

Journal of Finance 2026 81(2), 739-789 open access
ABSTRACT We use large language models to analyze the content of 4,700 private meetings between a large active asset manager and its portfolio firms. The high‐level meetings convey mostly soft information about the firm, and little about industry or market. Fund manager meetings focus on business models and financial metrics, while governance specialist meetings focus on environmental, social, and governance risks; 0.4% of meetings discuss material nonpublic information. Trades by fund managers increase with meetings attended by senior management, rated as unusually good or bad, where the tone is significantly positive or negative, or assessed as creating consensus. Meeting‐informed portfolios can generate significant outperformance.

Returns to Shareholder Activism: Evidence from a Clinical Study of the Hermes UK Focus Fund

Review of Financial Studies 2010 23(3), 3093-3129 open access
This article reports a unique analysis of private engagements by an activist fund. It is based on data made available to us by Hermes, the fund manager owned by the British Telecom Pension Scheme, on engagements with management in companies targeted by its UK Focus Fund. In contrast with most previous studies of activism, we report that the fund executes shareholder activism predominantly through private interventions that would be unobservable in studies purely relying on public information. The fund substantially outperforms benchmarks and we estimate that abnormal returns are largely associated with engagements rather than stock picking.

Returns to Shareholder Activism: Evidence from a Clinical Study of the Hermes UK Focus Fund

Review of Financial Studies 2009 22(8), 3093-3129 open access
This article reports a unique analysis of private engagements by an activist fund. It is based on data made available to us by Hermes, the fund manager owned by the British Telecom Pension Scheme, on engagements with management in companies targeted by its UK Focus Fund. In contrast with most previous studies of activism, we report that the fund executes shareholder activism predominantly through private interventions that would be unobservable