Scott Hirst

Boston University
School of Law
Office 1402A
765 Commonwealth Avenue
Boston, MA 02215

E-Mail: EmailAddress: hidden: you can email any NBER-related person as first underscore last at nber dot org
Institutional Affiliation: Boston University School of Law

NBER Working Papers and Publications

December 2019Index Funds and the Future of Corporate Governance: Theory, Evidence, and Policy
with Lucian A. Bebchuk: w26543
We seek to contribute to understanding index fund stewardship by providing a comprehensive theoretical, empirical, and policy analysis of such stewardship. We put forward an agency-cost theory of the stewardship decisions that index fund managers make. Our agency-costs analysis shows that index fund managers have strong incentives to (i) underinvest in stewardship and (ii) defer excessively to the preferences and positions of corporate managers. We also undertake an empirical analysis of the full range of stewardship activities that index funds do and do not undertake. We show that the body of evidence is, on the whole, consistent with the incentive issues identified by our agency-costs framework. Finally, we explain how our analysis should reorient important ongoing debates regarding comm...
June 2019The Specter of the Giant Three
with Lucian A. Bebchuk: w25914
This paper examines the large, steady, and continuing growth of the Big Three index fund managers—BlackRock, Vanguard, and State Street Global Advisors. We show that there is a real prospect that index funds will continue to grow, and that voting in most significant public companies will come to be dominated by the future “Giant Three.” We begin by analyzing the drivers of the rise of the Big Three, including the structural factors that are leading to the heavy concentration of the index funds sector. We then provide empirical evidence about the past growth and current status of the Big Three, and their likely growth into the Giant Three. Among other things, we document that the Big Three have almost quadrupled their collective ownership stake in S&P 500 companies over the past two decades...

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