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    • All HBS Web  (1,062)
      • Faculty Publications  (150)

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      • 2022
      • Working Paper

      Hidden Alpha

      By: Lauren Cohen, Manuel Amman, Alexander Cochardt and Stephan Heller
      Using the setting of financial agents, we explore the importance of hidden connections relative to all other network connections. We find that hidden connections are those associated with the largest and most significant abnormal returns accruing to fund managers—on...  View Details
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      Cohen, Lauren, Manuel Amman, Alexander Cochardt, and Stephan Heller. "Hidden Alpha." Working Paper, 2022.
      • Winter 2022
      • Article

      Distributing a Billion Vaccines: COVAX Successes, Challenges, and Opportunities

      By: Eric Budish, Hannah Kettler, Scott Duke Kominers, Erik Osland, Canice Prendergast and Andrew A. Torkelson
      By January 2022, the COVAX international vaccine collaboration had allocated over a billion vaccines to over 140 countries. We describe and review the allocation process chosen, which reflected both an objective of equitably distributing vaccines across the world and...  View Details
      Keywords: Vaccines; Pandemics; Health Care and Treatment; Health Pandemics; Distribution; Supply Chain; Equality and Inequality
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      Budish, Eric, Hannah Kettler, Scott Duke Kominers, Erik Osland, Canice Prendergast, and Andrew A. Torkelson. "Distributing a Billion Vaccines: COVAX Successes, Challenges, and Opportunities." Oxford Review of Economic Policy 38, no. 4 (Winter 2022): 941–974.
      • 2022
      • Working Paper

      How Do Investors Value ESG?

      By: Malcolm Baker, Mark Egan and Suproteem K. Sarkar
      Environmental, social, and governance (ESG) objectives have risen to near the top of the agenda for corporate executives and boards, driven in large part by their perceptions of shareholder interest. We quantify the value that shareholders place on ESG using a revealed...  View Details
      Keywords: Investment; Investment Portfolio; Corporate Social Responsibility and Impact; Business and Shareholder Relations; Environmental Sustainability; Governance; Financial Services Industry; United States
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      Baker, Malcolm, Mark Egan, and Suproteem K. Sarkar. "How Do Investors Value ESG?" NBER Working Paper Series, No. 30708, December 2022. (Harvard Business School Working Paper, No. 23-028, November 2022.)
      • 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.
      • 2022
      • Working Paper

      Segmented Arbitrage

      By: Emil Siriwardane, Adi Sunderam and Jonathan L. Wallen
      We use arbitrage activity in equity, fixed income, and foreign exchange markets to characterize the frictions and constraints facing intermediaries. The average pairwise correlation between the 29 arbitrage spreads that we study is 21%. These low correlations are...  View Details
      Keywords: Financial Intermediation; Arbitrage; Intermediary-based Asset Pricing; Finance; Segmentation
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      Siriwardane, Emil, Adi Sunderam, and Jonathan L. Wallen. "Segmented Arbitrage." NBER Working Paper Series, No. 30561.
      • April 2022 (Revised August 2022)
      • Case

      Conflicts of Interest at Uptown Bank

      By: Jonas Heese
      In 2013, two employees debated whether to blow the whistle on their employer, Bell Bank, after completing an internal review that revealed undisclosed conflicts of interest. Bell Bank’s Asset Management business disproportionately invested clients’ money in Bell Bank’s...  View Details
      Keywords: Whistleblower; Whistleblowing; Mutual Funds; Conflicts Of Interest; Decision Making; Decisions; Judgments; Ethics; Moral Sensibility; Values and Beliefs; Finance; Financial Institutions; Banks and Banking; Financial Management; Investment; Investment Funds; Governance; Corporate Accountability; Corporate Disclosure; Corporate Governance; Governance Compliance; Governance Controls; Policy; Law; Legal Liability; Social Psychology; Motivation and Incentives; Perception; Perspective; Trust; Financial Services Industry; North and Central America; United States
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      Heese, Jonas. "Conflicts of Interest at Uptown Bank." Harvard Business School Case 122-022, April 2022. (Revised August 2022.)
      • March 2022 (Revised June 2022)
      • 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 June 2022.)
      • 2022
      • Working Paper

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

      By: Alex Chinco and Marco Sammon
      We estimate that passive investors held 37.8% of the US stock market in 2020. This value comes from studying the closing volumes of index additions and deletions on reconstitution day. 37.8% is more than double the widely accepted previous estimate of 15%, which...  View Details
      Keywords: Indexing; Passive Investing; Exchange-traded Funds (ETFs); Russell Reconstitution Day; Trading Volume; Information-based Asset Pricing; Investment; Investment Funds; Asset Pricing
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      Chinco, Alex, and Marco Sammon. "The Passive-Ownership Share Is Double What You Think It Is." Working Paper, August 2022.
      • January 2022
      • Article

      Replicating Private Equity with Value Investing, Homemade Leverage, and Hold-to-Maturity Accounting

      By: Erik Stafford
      The contributions of asset selection and incremental leverage to buyout investment performance are more important than typically assumed or estimated to be. Buyout funds select small firms with distinct value characteristics. Public equities with these characteristics...  View Details
      Keywords: Replicating Portfolio; Private Equity; Investment Portfolio
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      Stafford, Erik. "Replicating Private Equity with Value Investing, Homemade Leverage, and Hold-to-Maturity Accounting." Review of Financial Studies 35, no. 1 (January 2022): 299–342.
      • 2022
      • Working Paper

      The International Price of Remote Work

      By: Agostina Brinatti, Alberto Cavallo, Javier Cravino and Andres Drenik
      We use data from a large web-based job platform to study how the price of remote work is determined in a globalized labor market. In the platform, workers located around the world compete for jobs that can be done remotely. We document that, despite the global nature...  View Details
      Keywords: Remote Work; Exchange Rates; Purchasing Power Parity; Offshoring And Outsourcing; Macroeconomics; Developing Countries and Economies; Wages; Trade; Globalization; Marketplace Matching; Currency Exchange Rate; Service Industry; Web Services Industry; Technology Industry
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      Brinatti, Agostina, Alberto Cavallo, Javier Cravino, and Andres Drenik. "The International Price of Remote Work." NBER Working Paper Series, No. 29437, October 2021. (Revised November 2022.)
      • September 2021
      • Case

      Brown Capital Management

      By: Luis M. Viceira, Emily R. McComb and Sarah Mehta
      Set in July 2021, this case looks at several growth strategies under consideration at Brown Capital, the second-oldest Black-owned asset management firm in the U.S. Since its 1983 founding, Baltimore-based Brown Capital has specialized in small company growth...  View Details
      Keywords: Business Growth and Maturation; Growth and Development Strategy; Diversity; Race; Finance; Equity; Public Equity; Stocks; Financial Management; Financial Strategy; Investment; Investment Portfolio; Employee Stock Ownership Plan; Recruitment; Retention; Selection and Staffing; Employee Ownership; Strategy; Financial Services Industry; United States; Maryland; Baltimore
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      Viceira, Luis M., Emily R. McComb, and Sarah Mehta. "Brown Capital Management." Harvard Business School Case 222-002, September 2021.
      • 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
      Keywords: Health Pandemics; Financial Liquidity; Cost Management; Decision Choices and Conditions; Risk Management
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      Siriwardane, Emil N., Luis M. Viceira, Dean Xu, and Lucas Baker. "Pershing Square's Pandemic Trade (A)." Harvard Business School Case 222-007, July 2021. (Revised December 2021.)
      • July 2021
      • Article

      Augmenting Markets with Mechanisms

      By: Samuel Antill and Darrell Duffie
      We explain how the common practice of size-discovery trade detracts from overall financial market efficiency. At each of a series of size-discovery sessions, traders report their desired trades, generating allocations of the asset and cash that rely on the most recent...  View Details
      Keywords: Mechanism Design; Price Impact; Size Discovery; Allocative Efficiency; Workup; Dark Pool; Financial Markets; Market Design; Performance Efficiency
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      Antill, Samuel, and Darrell Duffie. "Augmenting Markets with Mechanisms." Review of Economic Studies 88, no. 4 (July 2021): 1665–1719.
      • 2021
      • Working Paper

      Going by the Book: Valuation Ratios and Stock Returns

      By: Ki-Soon Choi, Eric So and Charles C.Y. Wang
      We study the use of firms’ book-to-market ratios (B/M) in value investing and its implications for comovements in firms’ stock returns and trading volumes. We show B/M has become increasingly detached from common alternative valuation ratios over time while also...  View Details
      Keywords: Valuation Ratios; Book-to-market Ratios; Investment Return; Investment; Decision Making
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      Choi, Ki-Soon, Eric So, and Charles C.Y. Wang. "Going by the Book: Valuation Ratios and Stock Returns." Harvard Business School Working Paper, No. 21-126, May 2021.
      • 2020
      • Working Paper

      Currency Hedging in Emerging Markets: Managing Cash Flow Exposure

      By: Laura Alfaro, Mauricio Calani and Liliana Varela
      Foreign currency derivative markets are among the largest in the world, yet their role in emerging markets in particular, is relatively understudied. We study firms' currency risk exposure and their hedging choices by employing a unique dataset covering the universe of...  View Details
      Keywords: Foreign Currency Hedging; FX Derivatives; Foreign Currency Debt; Currency Mismatch; Trade Credit; Currency; Cash Flow; Emerging Markets
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      Alfaro, Laura, Mauricio Calani, and Liliana Varela. "Currency Hedging in Emerging Markets: Managing Cash Flow Exposure." Harvard Business School Working Paper, No. 21-096, March 2021.
      • Article

      Tariff Passthrough at the Border and at the Store: Evidence from U.S. Trade Policy

      By: Alberto Cavallo, Gita Gopinath, Brent Neiman and Jenny Tang
      We use micro data collected at the border and the store to characterize the price impact of recent US trade policy on importers, exporters, and consumers. At the border, import tariff passthrough is much higher than exchange rate passthrough. Chinese exporters did not...  View Details
      Keywords: Trade Policy; Tariffs; Exchange Rate Passthrough; Economics; Trade; Policy; Currency Exchange Rate; Price; United States
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      Cavallo, Alberto, Gita Gopinath, Brent Neiman, and Jenny Tang. "Tariff Passthrough at the Border and at the Store: Evidence from U.S. Trade Policy." American Economic Review: Insights 3, no. 1 (March 2021).
      • January 2021 (Revised May 2021)
      • Case

      Delta Air Lines: Navigating the COVID-19 Storm

      By: Ted Berk and Ryan Flamerich
      This case examines Delta Air Lines’ response as demand for its services plummeted in the face of the COVID-19 pandemic, with a focus on the company’s funding needs and capital structure. Following a series of initial actions, the company’s cash “burn” had reduced from...  View Details
      Keywords: COVID-19; Health Pandemics; Financial Condition; Capital Structure; Crisis Management; Risk Management; Business and Stakeholder Relations; Air Transportation Industry
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      Berk, Ted, and Ryan Flamerich. "Delta Air Lines: Navigating the COVID-19 Storm." Harvard Business School Case 221-063, January 2021. (Revised May 2021.)
      • 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.)
      • October 2020
      • Article

      The Elasticity of Science

      By: Kyle Myers
      This paper identifies the degree to which scientists are willing to change the direction of their work in exchange for resources. Data from the National Institutes of Health are used to estimate how scientists respond to targeted funding opportunities. Inducing a...  View Details
      Keywords: Scientists; Funding; Research; Change
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      Myers, Kyle. "The Elasticity of Science." American Economic Journal: Applied Economics 12, no. 4 (October 2020): 103–134.
      • March 2020
      • Article

      Do Fire Sales Create Externalities?

      By: Sergey Chernenko and Adi Sunderam
      We develop three novel measures of how much of the price impact of their trading different mutual funds internalize. We show that mutual funds that internalize more of their price impact hold larger cash buffers and use these buffers more aggressively to accommodate...  View Details
      Keywords: Fire Sales; Externalities; Investment Funds; Price; Financial Liquidity; Management
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      Chernenko, Sergey, and Adi Sunderam. "Do Fire Sales Create Externalities?" Journal of Financial Economics 135, no. 3 (March 2020): 602–628.
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