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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
Trade and Industrial Policy in Supply Chains: Directed Technological Change in Rare Earths
By: Laura Alfaro, Harald Fadinger, Jay Schymik and Gede Virananda
Trade and industrial policies, while primarily intended to support domestic industries, may unintentionally stimulate technological progress abroad. We document this mechanism in the case of rare earth elements (REEs)—critical inputs for manufacturing at the knowledge... View Details
- 2025
- Working Paper
Trade Within Multinational Boundaries
By: Laura Alfaro, Paola Conconi, Fariha Kamal and Zachary Kroff
We leverage newly linked data from the U.S. Census Bureau and the U.S. Bureau of Economic Analysis to study transactions within U.S. multinational enterprises (MNEs). We show that using administrative data on intrafirm trade allows us to correct for measurement error... 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
The Political Economy of Firm Networks: CEO Ideology and Global Trade
By: Elisabeth Kempf, Mancy Luo and Margarita Tsoutsoura
We examine how the political ideology of corporate leaders shapes cross-border firm
networks. Exploiting changes in ideological alignment between U.S. firm CEOs and
foreign governments around close foreign elections, we show that U.S. firms are more
likely to... View Details
- April 2025
- Supplement
Velong: Rethinking “Made in China” (B)
By: Krishna G. Palepu, Billy Chan and Nancy Dai
After much deliberation, the founders of Velong formed a joint venture with two local partners in India as they calculated that India could remain intact amidst the rising tensions over trade between the U.S. and China. By choosing India to diversify away from China,... 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
- 2025
- Working Paper
Tracking the Short-Run Price Impact of U.S. Tariffs
By: Alberto Cavallo, Paola Llamas and Franco Vazquez
This paper examines the short-run impact of the 2025 U.S. tariffs on consumer prices using a unique integration of high-frequency retail pricing data, product-level country-of-origin information, and detailed tariff classifications. By linking daily prices from major... View Details
- March 2025 (Revised April 2025)
- Case
WallStreetBets: Democratizing Retail Investing
By: Joseph Pacelli and Alexis Lefort
In summer 2024, Jaime Rogozinski anticipated the launch of a day-trading eSports event, a vision he had nurtured for years. Rogozinski, the founder of the influential subreddit WallStreetBets (WSB), created the forum in 2012 as a space for retail traders to explore... View Details
- March 2025 (Revised March 2025)
- Case
Good for the Seller, Good for the Buyer and Good for Society: Sampo-yoshi, Sustainability and Trust at ITOCHU
By: Sandra J. Sucher and Bethelehem Y Araya
In 2024, ITOCHU CEO Masahiro Okafuji was at a crossroads. As the thirteenth CEO since ITOCHU’s founding in 1858, he had fueled the company’s growth since 2011 by bringing ITOCHU’s founding philosophy of Sampo-yoshi (good for the seller, good for the buyer and... View Details
- 2025
- Working Paper
Centralized Governance in Decentralized Organizations
By: Lin William Cong, Daniel Rabetti, Charles C.Y. Wang and Yu Yan
We systematically document governance centralization in decentralized autonomous organizations (DAOs) and study its drivers and economic implications. Using multiple data sources and granular on-chain transactional data, we compare our findings to those in corporate... View Details
- 2025
- Working Paper
Turning Away from the State: Trade Shocks and Informal Insurance in Brazil
By: Paula Rettl
How does economic globalization affect vote choices? Conventional wisdom holds that voters who lose from economic integration support parties that propose expanding the welfare state. However, in the Global South, where the state is frequently weak or under-resourced,... View Details
- 2025
- Working Paper
Is Love Blind? AI-Powered Trading with Emotional Dividends
By: De-Rong Kong and Daniel Rabetti
We leverage the non-fungible tokens (NFTs) setting to assess the valuation of emotional dividends (LOVE), a long-standing empirical challenge in private-value markets such as art, antiques, and collectibles. Having created and validated our proxy, we use deep learning... View Details
- 2025
- Working Paper
Tax Planning, Illiquidity, and Credit Risks: Evidence from DeFi Lending
By: Lisa De Simone, Peiyi Jin and Daniel Rabetti
This study establishes a plausible causal link between tax-planning-induced illiquidity and credit risks in lending markets. Exploiting an exogenous tax shock imposed by the Internal Revenue Service (IRS) on cryptocurrency gains, along with millions of transactions in... 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
- 2025
- Working Paper
Why Companies Thrive Or Die: Ownership and the Path to Perpetuation
By: Josh Baron
Why do some companies continue to thrive for decades and others die after an initial run of success? Much like an airplane accident, company failure is generally the consequence of cascading effects that combine together to overwhelm a previously effective strategy.... View Details
- January 2025 (Revised April 2025)
- Case
Doing Business in Cairo: Navigating a Path to Economic Resilience
By: A. Zelleke and Ahmed Dahawy
Egypt has long been a pivotal force in the Middle East and North Africa. Located at a crossroads of global trade routes, the country was a strategic partner for numerous regional and global powers. However, a substantial currency devaluation in 2016 brought many... View Details
Keywords: Business; Developing Countries and Economies; Economic Slowdown and Stagnation; Inflation and Deflation; Macroeconomics; Cross-Cultural and Cross-Border Issues; Globalized Economies and Regions; International Relations; Emerging Markets; Risk and Uncertainty; Culture; Economy; Country; Currency; Investment; Governing Rules, Regulations, and Reforms; Egypt
- January 2025
- Case
Index and Active Investing: Vanguard and the New Frontier of Active ETFs
By: Marco Sammon, Luis M. Viceira and Jonathan Kanagasabai
This case explores Vanguard’s strategic decision-making process as it considers entering the growing market for actively managed exchange-traded funds (ETFs). Set in 2024, the case places students in the position of Rodney Comegys, Vanguard’s global head of the Equity... View Details
- January 2025
- Technical Note
Technical Note on Mutual Funds and Exchange Traded Funds (ETFs)
By: Marco Sammon, Luis M. Viceira and Jonathan Kanagasabai