Robert C. Merton and the Science of Finance- a Collection
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BRIEF / ROBERT C. MERTON AND THE SCIENCE OF FINANCE CFA INSTITUTE RESEARCH FOUNDATION / BRIEF ROBERT C. MERTON AND THE SCIENCE OF FINANCE A COLLECTION LUIS GARCIA-FEIJÓO, CFA, CIPM, LAURENCE B. SIEGEL, AND TIMOTHY R. KOHN, EDITORS GARCIA-FEIJÓO, SIEGEL, AND KOHN ROBERT C. MERTON AND THE SCIENCE OF FINANCE A Collection Luis Garcia-Feijóo, CFA, CIPM, Laurence B. Siegel, and Timothy R. Kohn, Editors Statement of Purpose CFA Institute Research Foundation is a not-for- profit organization established to promote the development and dissemination of relevant research for investment practitioners worldwide. Neither CFA Institute Research Foundation, CFA Institute, nor the publication’s edi- torial staff is responsible for facts and opinions presented in this publication. This publication reflects the views of the author(s) and does not represent the official views of CFA Institute Research Foundation. 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Cover photo credit: fanjianhua / Moment / Getty Images ISBN 978-1-944960-99-5 Luis Garcia-Feijóo, CFA, CIPM Florida Atlantic University and CFA Institute Research Foundation Laurence B. Siegel CFA Institute Research Foundation Timothy R. Kohn Dimensional Fund Advisors ROBERT C. MERTON AND THE SCIENCE OF FINANCE A Collection CONTENTS Foreword: Robert C. Merton and His Impact on the Science of Finance .................................. vii David Booth Introduction ........................................................................................................................ 1 Luis Garcia-Feijóo, CFA, CIPM, and Laurence B. Siegel Robert C. Merton and the Science of Finance ........................................................................ 3 Zvi Bodie Robert K. Merton, Robert C. Merton, Functional Social Science, and Finance ......................... 11 Harriet Zuckerman Trust and the Functional Perspective .................................................................................... 21 Richard Thakor The Relationship between Economics and Finance ................................................................. 25 James Poterba Robert Merton’s Impact on Retirement Security: Finance Science, SeLFIES, and the MMM Plan .......................................................................................................... 32 Arun Muralidhar Panel ................................................................................................................................... 46 Zvi Bodie, Carliss Baldwin, Deborah Lucas, Peter Tufano, and André Perold Developing a Theory of Convertible Securities ...................................................................... 56 Marti Subrahmanyam What Would Bob Merton Say or Do? .................................................................................... 59 André Perold Robert C. Merton: The First Financial Engineer ..................................................................... 63 Andrew W. Lo This publication qualifies for 4 PL credits under the guidelines of the CFA Institute Professional Learning Program. FOREWORD: ROBERT C. MERTON AND HIS IMPACT ON THE SCIENCE OF FINANCE David Booth Dimensional Fund Advisors Dimensional Fund Advisors was proud to models laid the foundation for an entirely cosponsor the 2019 MIT symposium honor- new branch of finance that revolutionized the ing Robert C. Merton that is faithfully summa- way financial firms manage risk. We endorse rized in this CFA Institute Research Foundation and share his belief that best practice is not publication. good enough; we must all continually inno- vate to improve outcomes for our clients and Dimensional is dedicated to translating aca- investors—and for future generations. demic research into practical investment solu- tions. Since 2010, Bob has been our resident The speeches in this volume make abundantly scientist working on retirement income solu- clear that Bob has had a profound impact both tions. His effort to link science and the practice as a financial science pioneer and as a teacher of finance was groundbreaking when he started and mentor. And I can attest, based on my years his career, and today, he remains committed to as his colleague, that his influence as a friend is the power of ideas and putting them to work to no less profound. solve real challenges. It is easy to think of Bob Merton as the father of financial engineering. His continuous-time CFA Institute Research Foundation | vii INTRODUCTION Luis Garcia-Feijóo, CFA, CIPM, and Laurence B. Siegel Robert C. Merton, winner of the 1997 Nobel complete set of videos of the entire event, which Prize in economics, is one of the most influ- can be found at https://www.youtube.com/ ential scholars in the history of financial eco- watch?v=zLYlMi83o5Y. nomics. His work on continuous-time finance, option pricing, financial services firms, and The brief begins with an overview of Merton’s retirement security is central to the current work and career, authored by Zvi Bodie. It state of knowledge. then presents edited transcripts of some of the speeches and panel discussions that took place On August 5 and 6, 2019, MIT hosted a sym- at the symposium. The authors of these pieces posium in honor of Merton’s 75th birthday. The graciously contributed their time following idea for this symposium originated with several the conference to make this brief possible.1 of Merton’s former students, whose careers Professor Bodie organized and put some struc- were shaped by his influence. Realizing that he ture into the conference by asking the present- was about to turn 75 on July 31, 2019, Zvi Bodie ers to focus on a specific aspect of Merton’s took the initiative to organize a celebratory sym- work so that summed across the presenters, the posium with a steering committee consisting of audience would gain a full picture of Merton’s Eric Rosenfeld, Leonid Kogan, and Andrew Lo influence while avoiding repetition. The presen- as well as Professor Bodie. They invited for- tations illustrate the impact that Merton had, mer students and colleagues to prepare papers and continues to have, on the profession not and presentations explaining the influence that only as an author but also as a teacher, mentor, Merton had on their ideas, careers, and lives. and adviser to financial practice. Every one of the people invited to make a pre- Some readers may not know that Merton’s sentation accepted enthusiastically. The MIT father, Robert K. Merton, was one of the most finance department, represented by Kelly Nixon, important sociologists of the last half of the coordinated the logistics, and Dimensional 20th century. As Harriet Zuckerman, who is the Fund Advisors (DFA) and Convexity Wines elder Merton’s widow as well as a sociologist of jointly funded the event. We thank David Booth great accomplishment, mentions in her presen- and Tim Kohn at DFA, and Chi-fu Huang, John tation, he is the originator of the concept of role Meriwether, and Eric Rosenberg at Convexity models, of unanticipated consequences, and Wines for their generosity and support. of self-fulfilling prophecies, just to give a few examples. His ideas on functions laid the foun- Roughly a hundred people—former students, dation for the younger Merton and Zvi Bodie’s colleagues, and Merton’s family—gathered at MIT for the symposium. The result was an intel- 1This brief includes selected conference presentations. We lectually stimulating and heartwarming event are grateful to everyone who presented, including those that is summarized in this brief. There is also a whose excellent presentations are not available for inclu- sion herein. CFA Institute Research Foundation | 1 INTRODUctiON work on the functional perspective of the finan- Marti Subrahmanyam, a finance professor at cial system. NYU, presents a research project that allows him to illustrate some of Merton’s teachings. In Robert C. Merton’s current interests include the his article, Subrahmanyam and coauthors show role of trust in financial markets, a classic topic theoretically that the optimal contract between that regained relevance following the global an entrepreneur and a financier takes the form financial crisis. Richard Thakor, a professor of of a convertible security, as it is common in economics and psychology at the University practice, but in their model they do not assume of Minnesota Carlson School of Management, information asymmetry, contrary to existing describes his and Merton’s recent theoretical models. He notes that today, it is nearly impos- work on trust. Thakor explains that the combi- sible to develop a theoretical model in finan- nation of their model and Merton’s functional cial economics without relying on Merton’s