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Publications
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- Working Paper
Index Rebalancing and Stock Market Composition: Do Indexes Time the Market?
By: Marco Sammon and John J. Shim
Value-weighted indexes must rebalance in response to stock market composition changes, e.g., issuance, buybacks, and IPOs. In doing so, existing index funds implicitly engage in market timing. Index funds’ long-short rebalancing portfolios have a -3.5% annual return... View Details
- 2025
- Working Paper
Bank Financing of Global Supply Chains
By: Laura Alfaro, Mariya Brussevich, Camelia Minoiu and Andrea Presbitero
Finding new international suppliers is costly, so most importers source inputs from a single country. We examine the role of banks in mitigating trade search costs during the 2018–2019 U.S.-China trade tensions. We match data on shipments to U.S. ports with the U.S.... View Details
- 2025
- Working Paper
Generative AI Use by Capital Market Information Intermediaries: Evidence from Seeking Alpha
By: Mark Bradshaw, Chenyang Ma, Benjamin Yost and Yuan Zou
We study the use of generative AI for firm-specific financial analysis on the Seeking Alpha platform. We find that, after the initial launch of ChatGPT in November 2022, the share of AI-generated articles rose sharply to 13.4% of all articles, then declined in late... View Details
- 2025
- Working Paper
Navigating Choppy Waters: How U.S. Trade Policy Uncertainty Affects Small Businesses
By: David Atkin, Zoë Cullen and Ebehi Iyoha
This paper explores the impact of recent changes in the US trade policy environment
on small businesses. Drawing on a survey of more than 4,000 small businesses conducted
between March 22 and 31, 2025, we examine firms’ knowledge, expectations, and
decisions during... View Details
- February 13, 2025
- Article
Research: The Costs of Circumventing Tariffs
By: Jaya Y. Wen, Ebehi Iyoha, Edmund Malesky and Sung-Ju Wu
When tariffs are levied against a specific country, that country might attempt to circumvent the tariff by rerouting products through a third country to avoid the higher taxes. Research in the aftermath of the 2018 U.S.-China trade war examined this phenomenon, finding... View Details
- 2024
- Working Paper
Scaling Core Earnings Measurement with Large Language Models
By: Matthew Shaffer and Charles CY Wang
We study the application of large language models (LLMs) to the estimation of core earnings, i.e., a firm's persistent profitability from its core business activities. This construct is central to investors' assessments of economic performance and valuations. However,... View Details
- July 2024
- Case
Wizards of the Coast and Magic: The Rebounding
By: Boris Groysberg and Tom Quinn
This case traces the history and growth of the Magic: The Gathering trading card game. From its development in 1993 by tiny studio Wizards of the Coast, to Wizards’ acquisition by toy giant Hasbro in 1999, to its evolution into a billion-dollar brand in 2023,... View Details
Keywords: Business Growth and Maturation; Change Management; Transformation; Cost vs Benefits; Business Cycles; Games, Gaming, and Gambling; Global Strategy; Growth and Development; Selection and Staffing; Collaborative Innovation and Invention; Innovation Leadership; Intellectual Property; Job Design and Levels; Knowledge Use and Leverage; Leading Change; Growth and Development Strategy; Growth Management; Management Succession; Risk Management; Brands and Branding; Product Positioning; Organizational Change and Adaptation; Competitive Strategy; Competitive Advantage; Expansion; Mergers and Acquisitions; Product Development; Entertainment and Recreation Industry; United States; Washington (state, US); Seattle; Japan
- 2024
- Article
Half the Firms, Double the Profits: Public Firms' Transformation, 1996–2022
By: Mark J. Roe and Charles C.Y. Wang
The number of public firms in the United States has halved since the beginning of the twenty-first century, causing consternation among corporate and securities law regulators. The dominant explanations, often advanced by Securities and Exchange commissioners when... View Details
- 2024
- Working Paper
Lost in Transmission
By: Thomas Graeber, Shakked Noy and Christopher Roth
For many decisions, people rely on information received from others by word of mouth. How does the process of verbal transmission distort economic information? In our experiments, participants listen to audio recordings containing economic forecasts and are paid to... View Details
- October 2023
- Article
Product Variety, the Cost of Living, and Welfare Across Countries
By: Alberto Cavallo, Robert C. Feenstra and Robert Inklaar
We use the structure of the Melitz (2003) model to compute the cost of living and welfare across 47 countries, and compare these to conventional measures of prices and real consumption from the International Comparisons Project (ICP). The cost of living is inferred... View Details
- September–October 2023
- Article
The New Era of Industrial Policy Is Here
By: Willy C. Shih
Governments around the world are increasingly intervening in the private sector through industrial policies designed to help domestic sectors reach goals that markets alone are unlikely to achieve. Companies in targeted sectors—such as automakers, energy companies, and... View Details
- 2023
- Working Paper
The Market for Sharing Interest Rate Risk: Quantities and Asset Prices
By: Ishita Sen, Umang Khetan, Jane Li and Ioana Neamtu
We study the extent of interest rate risk sharing across the financial system using granular positions and transactions data in interest rate swaps. We show that pension and insurance (PF&I) sector emerges as a natural counterparty to banks and corporations: overall,... View Details
- June 2023
- Article
Why Is Dollar Debt Cheaper? Evidence from Peru
By: Bryan Gutiérrez, Victoria Ivashina and Juliana Salomao
In emerging markets, a significant share of corporate loans are denominated in dollars. Using novel data that enables us to see currency and the cost of credit, in addition to several other transaction-level characteristics, we re-examine the reasons behind dollar... View Details
- April 2023
- Article
Are Intermediary Constraints Priced?
By: Wenxin Du, Benjamin Hebert and Amy Wang Huber
Violations of no-arbitrage conditions measure the shadow cost of intermediary constraints. Intermediary asset pricing and intertemporal hedging together imply that the risk of these constraints tightening is priced. We describe a “forward CIP trading strategy” that... View Details
- January 2023
- Case
Velong: Rethinking 'Made in China'
By: Krishna G. Palepu, Nancy Hua Dai and Billy Chan
Velong is a supplier of kitchen equipment and backyard grills for major global brands and store brands of large western retailers. In light of the COVID-related disruptions to the global supply chains, and the evolving trade tensions between China and the Western... View Details
Keywords: Globalization; Supply Chain Management; Risk Management; Manufacturing Industry; China; India; Mexico; Turkey; Viet Nam
- December 2022
- Case
To Feed the Planet: Juan Luciano at ADM
By: Joshua D. Margolis, David E. Bell, Damien McLoughlin, Stacy Straaberg and James Weber
In December 2022, Juan Luciano, Chairman and CEO of agribusiness and nutrition giant ADM, considered the next phase of the historic company’s future. Beginning in 2011 when he joined as COO and moving into his tenure as CEO in 2015, Luciano led a transformation of ADM... View Details
Keywords: Agriculture; Leadership; Agribusiness; Acquisition; Business Units; Customer Focus and Relationships; Customer Value and Value Chain; Forecasting and Prediction; Capital; Cash; Cost of Capital; Cost Management; Profit; Food; Global Range; Innovation Strategy; Leadership Development; Leadership Style; Leading Change; Growth and Development Strategy; Risk Management; Organizational Culture; Organizational Structure; Strategic Planning; Risk and Uncertainty; Adaptation; Business Strategy; Corporate Strategy; Vertical Integration; Value Creation; Transformation; Agriculture and Agribusiness Industry; Energy Industry; United States; Chicago
- Article
The Value of Intermediation in the Stock Market
By: Marco Di Maggio, Mark Egan and Francesco Franzoni
We estimate a structural model of broker choice to quantitatively decompose the value that institutional investors attach to broker services. Studying over 300 million institutional equity trades, we find that investors are sensitive to both explicit and implicit... View Details
- June 2022
- Case
Business Implications from Regulating Carbon Emissions in the EU
By: George Serafeim and Benjamin Maletta
In the beginning of the 21st century, the European Union (the EU) had led the global fight against climate change with a wide array of policy measures. The EU’s primary approach to climate policy had been taxation via the European Union Emissions Trading System (EU... View Details
- February 2022
- Supplement
SpartanNash Company: The Amazon Warrants (A)
By: Benjamin C. Esty, E. Scott Mayfield and Daniel Fisher
As of 12/31/21, Amazon held $22 billion of equity and warrants in related companies. In fact, it often requests a free grant of warrants when it enters into a new commercial agreement with a supplier. Over the past 20 years, Amazon has gotten warrants almost 20... View Details
- January 2022
- Case
SpartanNash Company: The Amazon Warrants (A)
By: Benjamin C. Esty, E. Scott Mayfield and Daniel Fisher
As of 12/31/21, Amazon held $22 billion of equity and warrants in related companies. In fact, it often requests a free grant of warrants when it enters into a new commercial agreement with a supplier. Over the past 20 years, Amazon has gotten warrants in almost 20... View Details