Publications
Publications
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- November 2024 (Revised January 2025)
- Case
Balancing Impact: Modeling the Future at British International Investment
By: Shawn Cole and Jonah Zahnd
In 2022, British International Investment (BII), the £8.1 billion development finance arm of the British government, implemented a new impact measurement system called the Impact Score to align its financial and impact objectives systematically. The tool was designed... View Details
- 2023
- Working Paper
Interest-Rate Risk and Household Portfolios
By: Sylvain Catherine, Max Miller, James Paron and Natasha Sarin
How are households exposed to interest-rate risk? When rates fall, households face lower future expected returns but those holding long-term assets—disproportionately the wealthy and middle-aged—experience capital gains. We study the hedging demand for long-term assets... View Details
- July 2021 (Revised December 2021)
- Case
Pershing Square's Pandemic Trade (A)
By: Emil N. Siriwardane, Luis M. Viceira, Dean Xu and Lucas Baker
This case explores the decision that Bill Ackman, CEO and founder of the hedge fund Pershing Square Capital, was considering in late February 2020 about hedging the exposure of the fund’s portfolio from the potential financial fallout ensuing from an extreme event like... View Details
- May 2021
- Article
Preparing for a Pandemic: Accelerating Vaccine Availability
By: Amrita Ahuja, Susan Athey, Arthur Baker, Eric Budish, Juan Camilo Castillo, Rachel Glennerster, Scott Duke Kominers, Michael Kremer, Jean Lee, Canice Prendergast, Christopher M. Snyder, Alex Tabarrok, Brandon Joel Tan and Witold Wiecek
Vaccinating the world’s population quickly in a pandemic has enormous health and economic benefits. We analyze the problem faced by governments in determining the scale and structure of procurement for vaccines. We analyze alternative approaches to procurement, arguing... View Details
- 2020
- Working Paper
Best Ideas
By: Miguel Antón, Randolph B. Cohen and Christopher Polk
We find that the stocks in which active mutual fund or hedge fund managers display the most conviction towards ex-ante, their “Best ideas,” outperform the market, as well as the other stocks in those managers’ portfolios, by approximately 2.8 to 4.5 percent per year,... View Details
- 2019
- Working Paper
Optimal Interventions for Increasing Healthy Food Consumption Among Low Income Households
By: Retsef Levi, Elisabeth Paulson and Georgia Perakis
The federal government currently spends over $100 billion per year on policies aimed to increase fruit and vegetable (FV) consumption among low income households. These include price-, nutrition education-, and access-related interventions. Currently, the government... View Details
- December 2018
- Case
Corporate Transformation at Merck KGaA, Darmstadt, Germany
By: Joseph B. Fuller, Amy C. Edmondson, Daniela Beyersdorfer and Tonia Labruyere
When Stefan Oschmann became CEO and chairman of the executive board of Merck KGaA, Darmstadt, Germany, in 2016, the company had started its transformation from a mid-tier traditional German industry player to a global modern science and technology player. The... View Details
- 2018
- Working Paper
Detecting Anomalies: The Relevance and Power of Standard Asset Pricing Tests
By: Malcolm Baker, Patrick Luo and Ryan Taliaferro
The two standard approaches for identifying capital market anomalies are cross-sectional coefficient tests, in the spirit of Fama and MacBeth (1973), and time-series intercept tests, in the spirit of Jensen (1968). A new signal can pass the first test, which we label a... View Details
- Fourth Quarter 2017
- Article
Optimal Tilts: Combining Persistent Characteristic Portfolios
By: Malcolm Baker, Ryan Taliaferro and Terry Burnham
We examine the optimal weighting of four tilts in U.S. equity markets from 1968 through 2014. We define a “tilt” as a characteristic-based portfolio strategy that requires relatively low annual turnover. This is a continuum, with small size (a very persistent... View Details
- Article
What Do Private Equity Firms Say They Do?
By: Paul A. Gompers, Steven N. Kaplan and Vladimir Mukharlyamov
We survey 79 private equity investors with combined assets under management (AUM) of over $750 billion about their practices in firm valuation, capital structure, governance, and value creation. Investors rely primarily on internal rate of return (IRR) and multiples to... View Details
- August 2016 (Revised July 2017)
- Background Note
Brand Portfolio Strategy and Brand Architecture
By: Jill Avery
While companies choose to brand their products and services in many different ways, there are some central tenets that help define an optimal brand portfolio and associated brand architecture. Brand portfolio strategy involves the design, deployment, and management of... View Details
- 2017
- Working Paper
Optimal Tilts: Combining Persistent Characteristic Portfolios
By: Malcolm Baker, Ryan Taliaferro and Terry Burnham
We examine the optimal weighting of four tilts in US equity markets from 1968 through 2014. We define a “tilt” as a characteristic-based portfolio strategy that requires relatively low annual turnover. This is a continuum, with small size, a very persistent... View Details
- 2015
- Working Paper
What Do Private Equity Firms Say They Do?
By: Paul A. Gompers, Steven N. Kaplan and Vladimir Mukharlyamov
We survey 79 private equity investors with combined assets under management (AUM) of over $750 billion about their practices in firm valuation, capital structure, governance, and value creation. Investors rely primarily on internal rate of return (IRR) and multiples to... View Details
- January 2011
- Case
AIC Netbooks: Optimizing Product Assembly
By: Steven C. Wheelwright and Sunru Yong
AIC Systems, located in Taichung, Taiwan, is a manufacturer of printed circuit boards, primarily for motherboards and video cards for personal computers. The firm is considered an original design manufacturer (ODM) and takes an active role in innovating and designing... View Details
- Article
Optimal Value and Growth Tilts in Long-Horizon Portfolios
By: Jakub W. Jurek and Luis M. Viceira
We develop an analytical solution to the dynamic portfolio choice problem of an investor with power utility defined over wealth at a finite horizon, who faces a time-varying investment opportunity set, parameterized using a flexible vector autoregression. We apply this... View Details
- November 2007
- Background Note
Asset Allocation I
By: Joshua D. Coval, Erik Stafford, Rodrigo Osmo, John Jernigan, Zack Page and Paulo Passoni
The goal of these simulations is to understand the mathematics of mean-variance optimization and the equilibrium pricing of risk if all investors use this rule with common information sets. Simulation A focuses on five to 10 years of monthly sector returns that are... View Details
- November 2007
- Background Note
Bayesian Estimation & Black-Litterman
By: Joshua D. Coval and Erik Stafford
Describes a practical method for asset allocation that is more robust to estimation errors than the traditional implementation of mean-variance optimization with sample means and covariances. The Bayesian inspired Black-Litterman model is described after introducing... View Details
- 1989
- Other Unpublished Work
Optimal Portfolio Rules in Continuous Time When the Nonnegativity Constraint on Consumption is Binding
By: Robert C. Merton
- October 1984
- Article
Large-Scale Portfolio Optimization
By: André Perold
Keywords: Financial Instruments