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  • All HBS Web  (247)
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    • News  (72)
    • Research  (141)
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  • Faculty Publications  (29)
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  • October 2020
  • Article

IQ from IP: Simplifying Search in Portfolio Choice

By: Huaizhi Chen, Lauren Cohen, Umit Gurun, Dong Lou and Christopher J. Malloy
Using a novel database that tracks web traffic on the SEC’s EDGAR servers between 2004 and 2015, we show that mutual fund managers gather information on a very particular subset of firms and insiders, and their surveillance is very persistent over time. This tracking... View Details
Keywords: Tracked Trades; Return Predictability; Institutional Trading; Insider Trading; Institutional Investing; Information; Investment Portfolio; Decisions; Management
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Chen, Huaizhi, Lauren Cohen, Umit Gurun, Dong Lou, and Christopher J. Malloy. "IQ from IP: Simplifying Search in Portfolio Choice." Journal of Financial Economics 138, no. 1 (October 2020): 118–137. (Winner of the First Prize, Crowell Memorial Award for Best Paper in Quantitative Investments, PanAgora Asset Management, 2019.)
  • Article

The Ownership and Trading of Debt Claims in Chapter 11 Restructurings

By: Victoria Ivashina, Benjamin Iverson and David C. Smith
What is the ownership structure of bankrupt debt claims? How does the ownership evolve though bankruptcy? And how does debt ownership influence Chapter 11 outcomes? To answer these questions, we construct a data set that identifies the entire capital structure for 136... View Details
Keywords: Ownership Structure; Distressed Debt; Trading In Bankruptcy; Restructuring; Capital Structure; Insolvency and Bankruptcy; Ownership; Borrowing and Debt; United States
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Ivashina, Victoria, Benjamin Iverson, and David C. Smith. "The Ownership and Trading of Debt Claims in Chapter 11 Restructurings." Journal of Financial Economics 119, no. 2 (February 2016): 316–335.
  • 11 Sep 2000
  • Research & Ideas

Riding the Internet Fast Track

well-known software retailer, not only launched Egghead.com but also placed all of its eggs in the Internet basket by closing its entire chain of stores. Still, established firms have been relatively slow to jump on the Internet fast View Details
Keywords: by Peter Jacobs
  • 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
Keywords: Tariffs; Trade; Price; Inflation and Deflation
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Cavallo, Alberto, Paola Llamas, and Franco Vazquez. "Tracking the Short-Run Price Impact of U.S. Tariffs." Working Paper, April 2025.
  • Research Summary

The NYSE Trading Floor and Spatial Dependence in Stock Returns

The floor of the New York Stock Exchange (NYSE) is organized by physical posts. Each post has at most thirty panels, and each panel tracks up to thirty stocks. I demonstrate that there is spatial dependence in return correlations. Specifically, returns for... View Details
  • 26 May 2015
  • Research & Ideas

Corporate Field Researchers Share Tricks of the Trade

her rationale for taking her research to the field. "I didn't believe and still don't believe that I could address these questions outside of a company context," she said. "Where else could I track creativity in the wild?" Leslie Perlow,... View Details
Keywords: by Carmen Nobel
  • 18 Jan 2017
  • Working Paper Summaries

The Ties that Bind: Railroad Gauge Standards, Collusion, and Internal Trade in the 19th Century US

Keywords: by Daniel P. Gross; Rail
  • January 2015 (Revised October 2018)
  • Case

Dogs of the Dow

By: Malcolm Baker, Samuel G. Hanson and James Weber
This case describes the Dogs of the Dow investment strategy, value investing, and using dividend yields as a means to determine intrinsic value. It also describes exchange traded notes and a particular exchange traded note, known as the Dogs of the Dow, which tracks... View Details
Keywords: Dow Jones; Dow Jones Industrial Average; Exchange Traded Note; Exchange Traded Fund; Value Investing; Benjamin Graham; Investment Strategy; Dividend Yield; Intrinsic Value; Dividend Discount Model; Michael O'Higgins; Financial Instruments; Investment; Strategy; Financial Services Industry; United States
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Baker, Malcolm, Samuel G. Hanson, and James Weber. "Dogs of the Dow." Harvard Business School Case 215-020, January 2015. (Revised October 2018.)
  • July 2024
  • Article

The Passive-Ownership Share Is Double What You Think It Is

By: Alex Chinco and Marco Sammon
Each time a stock gets added to or dropped from a benchmark index, we ask: “How much money would have to be tracking that index to explain the huge spike in rebalancing volume we observe on reconstitution day?” While index funds held 16% of the US stock market in 2021,... View Details
Keywords: Indexing; Passive Investing; Exchange-traded Funds (ETFs); Russell Reconstitution Day; Trading Volume; Information-based Asset Pricing; Investment Funds; Asset Pricing
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Chinco, Alex, and Marco Sammon. "The Passive-Ownership Share Is Double What You Think It Is." Journal of Financial Economics 157 (July 2024).
  • July 2023 (Revised February 2024)
  • Case

Equity Restructuring at Dell Technologies: Buy Out, Buy Up, Buy In (A)

By: Stuart C. Gilson and Sarah L. Abbott
In November 2018, Dell Technologies was poised to re-enter the public markets by means of a complex recapitalization that would replace an entire class of publicly-traded “tracking stock,” with new shares that would trade publicly without the need of a formal IPO. The... View Details
Keywords: Technology; M&A; Recapitalization; MBO; Equity Issues; Private Equity Buyouts; Public Ownership; Stock Shares; Mergers and Acquisitions; Equity; Technology Industry; United States
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Gilson, Stuart C., and Sarah L. Abbott. "Equity Restructuring at Dell Technologies: Buy Out, Buy Up, Buy In (A)." Harvard Business School Case 224-005, July 2023. (Revised February 2024.)
  • Article

Recovering Investor Expectations from Demand for Index Funds

By: Mark Egan, Alexander J. MacKay and Hanbin Yang
We use a revealed-preference approach to estimate investor expectations of stock market returns. Using data on demand for index funds that follow the S&P 500, we develop and estimate a model of investor choice to flexibly recover the time-varying distribution of... View Details
Keywords: Stock Market Expectations; Demand Estimation; Exchange-traded Funds (ETFs); Demand and Consumers; Investment
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Egan, Mark, Alexander J. MacKay, and Hanbin Yang. "Recovering Investor Expectations from Demand for Index Funds." Review of Economic Studies 89, no. 5 (October 2022): 2559–2599.
  • 2021
  • Working Paper

Recovering Investor Expectations from Demand for Index Funds

By: Mark Egan, Alexander J. MacKay and Hanbin Yang
We use a revealed-preference approach to estimate investor expectations of stock market returns. Using data on demand for index funds that follow the S&P 500, we develop and estimate a model of investor choice to flexibly recover the time-varying distribution of... View Details
Keywords: Stock Market Expectations; Demand Estimation; Exchange-traded Funds (ETFs); Demand and Consumers; Investment; United States
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Egan, Mark, Alexander J. MacKay, and Hanbin Yang. "Recovering Investor Expectations from Demand for Index Funds." NBER Working Paper Series, No. 26608, January 2020. (Accepted at the Review of Economic Studies. Harvard Business School Working Paper, No. 20-122, May 2020. Direct download. Revised July 2021.)
  • March 2022 (Revised February 2024)
  • Case

El Salvador: Launching Bitcoin as Legal Tender

By: Laura Alfaro, Carla Larangeira and Ruth Costas
In June 2021, Nayib Bukele, El Salvador’s president, surprised the world with the announcement that the country would adopt bitcoin as legal tender, becoming the first nation to do so. Bitcoin was mostly used for trading and had one of the most volatile track records... View Details
Keywords: Bitcoin; Cryptocurrency; Currency; Financial Strategy; Economic Growth; Governance; Macroeconomics; Assets; Latin America; El Salvador
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Alfaro, Laura, Carla Larangeira, and Ruth Costas. "El Salvador: Launching Bitcoin as Legal Tender." Harvard Business School Case 322-055, March 2022. (Revised February 2024.)
  • 13 Dec 2016
  • First Look

December 13, 2016

forthcoming Journal of Investment Consulting Cloaked Trading By: Cohen, Lauren, Dong Lou, and Christopher J. Malloy Abstract—Using a novel, proprietary database of micro-level trading activities by asset... View Details
Keywords: Carmen Nobel
  • March 2022 (Revised April 2022)
  • Case

In Search of Global Regulation

By: Geoffrey Jones and Mona Rahmani
The history of the international regulation of global capitalism is surveyed, addressing the challenges facing firms confronting international, national, and regional regulation. Follows the history of global regulation after 1914, from the League of Nations;... View Details
Keywords: History; Multinational Firms and Management; International Relations; Laws and Statutes; Corporate Governance; Business and Government Relations
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Jones, Geoffrey, and Mona Rahmani. "In Search of Global Regulation." Harvard Business School Case 822-122, March 2022. (Revised April 2022.)
  • October 2004 (Revised October 2013)
  • Case

In Search of Global Regulation

By: Geoffrey Jones, Mona Rahmani and Alexis Gendron
The history of the international regulation of global capitalism is surveyed, addressing the challenges facing firms confronting international, national, and regional regulation. Follows the history of global regulation after 1914, from the League of Nations'... View Details
Keywords: History; Multinational Firms and Management; International Relations; Laws and Statutes; Corporate Governance; Business and Government Relations
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Jones, Geoffrey, Mona Rahmani, and Alexis Gendron. "In Search of Global Regulation." Harvard Business School Case 805-025, October 2004. (Revised October 2013.)
  • May 2021
  • Article

The Firm Next Door: Using Satellite Images to Study Local Information Advantage

By: Jung Koo Kang, Lorien Stice-Lawrence and Forester Wong
We use novel satellite data that track the number of cars in the parking lots of 92,668 stores for 71 publicly listed U.S. retailers to study the local information advantage of institutional investors. We establish car counts as a timely measure of store-level... View Details
Keywords: Satellite Images; Store-level Performance; Institutional Investors; Local Advantage; Overweighting; Processing Costs; Alternative Data; Big Data; Emerging Technologies; Information; Quality; Institutional Investing; Decision Making; Behavioral Finance; Analytics and Data Science
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Kang, Jung Koo, Lorien Stice-Lawrence, and Forester Wong. "The Firm Next Door: Using Satellite Images to Study Local Information Advantage." Journal of Accounting Research 59, no. 2 (May 2021): 713–750.
  • 18 Jan 2022
  • Research & Ideas

How Eliminating Non-Competes Could Reshape Tech

Harvard Business School says. As part of a sweeping executive order aimed at promoting competition in the American economy, US President Joe Biden specifically called out non-compete agreements as hurtful to innovation and workers. Issued last July, the order asks the... View Details
Keywords: by Kristen Senz; Technology
  • 21 Jul 2022
  • Research & Ideas

Did Pandemic Stimulus Funds Spur the Rise of 'Meme Stocks'?

speculation. How to follow the ‘stimmy’ money There’s no direct way to track how stimulus funds went from American pockets into the market, so researchers looked at a wide range of signals, including surveys, US Census and Treasury data,... View Details
Keywords: by Rachel Layne; Financial Services
  • September 19, 2017
  • Article

After Equifax Breach, Companies Advised to Review Open-Source Software Code

By: Ben DiPietro and Lou Shipley
It doesn’t make much sense: At a time when high-powered automated trading systems can execute stock sales in real time, some companies that rely on open-source software to help to run their businesses track their open-source use on spread sheets on paper.
Lou... View Details
Keywords: Software; Open-source; Security Vulnerabilities; Data Privacy; Hack; Applications and Software; Safety; Cybersecurity
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DiPietro, Ben, and Lou Shipley. "After Equifax Breach, Companies Advised to Review Open-Source Software Code." Wall Street Journal (September 19, 2017).
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