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      • Faculty Publications  (128)

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      • October 2023
      • Article

      Stock Market Stimulus

      By: Robin Greenwood, Toomas Laarits and Jeffrey Wurgler
      We study the stock market effects of the arrival of the three rounds of “stimulus checks” to U.S. taxpayers and the single round of direct payments to Hong Kong citizens. The first two rounds of U.S. checks appear to have increased retail buying and share prices of...  View Details
      Keywords: Stock Market; COVID-19 Pandemic; Fiscal Stimulus; Stimulus Payments; Impact; Stocks; System Shocks; Price; Spending; United States; Hong Kong
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      Greenwood, Robin, Toomas Laarits, and Jeffrey Wurgler. "Stock Market Stimulus." Review of Financial Studies 36, no. 10 (October 2023): 4082–4112. (Also NBER Working Paper Series, No. 29827, January 2023.)
      • July 2023
      • 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; 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.
      • February 2023
      • Teaching Note

      Bear to Bull? An Analyst’s Journey with Netflix

      By: Aiyesha Dey and Joseph Pacelli
      Teaching Note for HBS Case No. 123-001. Wedbush Securities analyst Michael Pachter said “hell freezing over” was more likely than him upgrading the “sell” rating he had maintained on movie and television streaming giant Netflix since 2011, despite meteoric subscriber...  View Details
      Keywords: Equity; Analysis; Stock Shares
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      Dey, Aiyesha, and Joseph Pacelli. "Bear to Bull? An Analyst’s Journey with Netflix." Harvard Business School Teaching Note 123-072, February 2023.
      • January 2023 (Revised May 2023)
      • Case

      Peloton Interactive (A)

      By: Suraj Srinivasan, Lynn S. Paine and David Lane
      Early in February 2022, the board of Peloton Interactive faced some knotty challenges. Immense pandemic demand for its stationary exercise bicycles and treadmills had prompted the firm to scale up production rapidly. But as gyms reopened and the virulence of the virus...  View Details
      Keywords: Corporate Governance; Governing and Advisory Boards; Growth Management; Investment Activism; Leadership; Entertainment and Recreation Industry; Sports Industry; United States
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      Srinivasan, Suraj, Lynn S. Paine, and David Lane. "Peloton Interactive (A)." Harvard Business School Case 323-005, January 2023. (Revised May 2023.)
      • January 2023 (Revised August 2023)
      • Case

      Veeva Systems and the Transformation to a Public Benefit Corporation

      By: Ranjay Gulati and Allison M. Ciechanover
      Peter Gassner, the co-founder and CEO of Veeva Systems, steered the company through rapid scaling from its launch in 2007 to 2022. Year after year, the company had exceeded expectations, with its market capitalization reaching $50 billion at its peak. By 2022, the...  View Details
      Keywords: Transformation; Corporate Governance; Corporate Social Responsibility and Impact; Mission and Purpose; Organizational Culture; Information Technology Industry; Technology Industry; United States; California
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      Gulati, Ranjay, and Allison M. Ciechanover. "Veeva Systems and the Transformation to a Public Benefit Corporation." Harvard Business School Case 423-045, January 2023. (Revised August 2023.)
      • January 2023
      • Case

      EKI Energy Services: One Billion Carbon Credits

      By: George Serafeim
      Within nine months from the time of its Initial Public Offering (IPO) in April of 2021, EKI Energy Services (EKI) shares had increased by more than 8,000%. Equally explosive was the growth of the company’s revenues and Earnings Before Interest, Taxes and Depreciation...  View Details
      Keywords: Carbon Credits; Carbon Emissions; Growth; Business Analysis; Environmental Sustainability; Corporate Valuation; Climate Change; Accounting; Valuation; Transition; Renewable Energy; Analysis; Product Positioning; India
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      Serafeim, George. "EKI Energy Services: One Billion Carbon Credits." Harvard Business School Case 123-060, January 2023.
      • 2022
      • Other Article

      Freezeouts in Delaware and Around the World

      By: Guhan Subramanian
      Keywords: Acquisition; Stock Shares
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      Subramanian, Guhan. "Freezeouts in Delaware and Around the World." University of Pennsylvania Journal of Business Law 24, no. 4 (2022): 803–817.
      • 2023
      • Working Paper

      The Disappearing Index Effect

      By: Robin Greenwood and Marco Sammon
      The abnormal return associated with a stock being added to the S&P 500 has fallen from an average of 3.4% in the 1980s and 7.6% in the 1990s to 0.8% over the past two decades. This has occurred despite a significant increase in the share of stock market assets linked...  View Details
      Keywords: Stocks; Investment Return
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      Greenwood, Robin, and Marco Sammon. "The Disappearing Index Effect." Harvard Business School Working Paper, No. 23-025, December 2022. (Revised June 2023.)
      • 2023
      • Working Paper

      The Retail Habitat

      By: Toomas Laarits and Marco Sammon
      Retail investors trade hard-to-value stocks. Controlling for size, stocks with a high share of retail-initiated trades are composed of more intangible capital, have longer duration cash-flows and a higher likelihood of being mispriced. Consistent with retail-heavy...  View Details
      Keywords: Retail; Retail Trade; Intangible Capital; Mispricing; Investment; Valuation; Business Earnings
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      Laarits, Toomas, and Marco Sammon. "The Retail Habitat." Working Paper, May 2023.
      • September 2022 (Revised January 2023)
      • Case

      Bear to Bull: An Analyst’s Journey with Netflix

      By: Aiyesha Dey, Joseph Pacelli, Jennifer G. Lawson and Tom Quinn
      Wedbush Securities analyst Michael Pachter said “hell freezing over” was more likely than him upgrading the “sell” rating he had maintained on movie and television streaming giant Netflix since 2011, despite meteoric subscriber and share price growth. In 2022, however,...  View Details
      Keywords: Accounting; Asset Pricing; Cash Flow; Investment; Stocks; Equity; Analysis; Attitudes; Financial Services Industry; Entertainment and Recreation Industry; United States
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      Dey, Aiyesha, Joseph Pacelli, Jennifer G. Lawson, and Tom Quinn. "Bear to Bull: An Analyst’s Journey with Netflix." Harvard Business School Case 123-001, September 2022. (Revised January 2023.)
      • 2022
      • Working Paper

      Stock Market Stimulus

      By: Robin Greenwood, Toomas Laarits and Jeffrey Wurgler
      We study the stock market effects of the arrival of the three rounds of “stimulus checks” to U.S. taxpayers and the single round of direct payments to Hong Kong citizens. The first two rounds of U.S. checks appear to have increased retail buying and share prices of...  View Details
      Keywords: Stock Market; COVID-19 Pandemic; Fiscal Stimulus; Stimulus Payments; Impact; Stocks; System Shocks; Price; Spending; United States; Hong Kong; China
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      Greenwood, Robin, Toomas Laarits, and Jeffrey Wurgler. "Stock Market Stimulus." NBER Working Paper Series, No. 29827, March 2022. (Revised November 2022.)
      • 2023
      • Working Paper

      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; 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, May 2023.
      • 2022
      • Working Paper

      What Triggers National Stock Market Jumps?

      By: Scott R. Baker, Nicholas Bloom, Steven J. Davis and Marco Sammon
      We examine newspapers the day after major stock-market jumps to evaluate the proximate cause, geographic source, and clarity of these events from 1900 in the US, 1930 in the UK and 1980 in 12 other countries. We find four main results. First, the United States plays an...  View Details
      Keywords: Uncertainty; Policy Uncertainty; Stock Market; Financial Markets; Volatility; Risk and Uncertainty; Policy; Newspapers
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      Baker, Scott R., Nicholas Bloom, Steven J. Davis, and Marco Sammon. "What Triggers National Stock Market Jumps?" Working Paper, February 2022.
      • January 2022 (Revised February 2022)
      • Case

      Introducing EVA at ISS: A Better Way to Evaluate CEO Performance and Compensation?

      By: Jonas Heese, Charles C.Y. Wang and James Weber
      In early 2019, Anthony Campagna, the global director of fundamental research at ISS EVA, a unit of the proxy advisory firm Institutional Shareholder Services (ISS), was preparing to release ISS's analyses of public company performance and CEO compensation ahead of Say...  View Details
      Keywords: Jobs and Positions; Compensation and Benefits; Performance; Performance Productivity; Measurement and Metrics; Analytics and Data Science; Value; Business or Company Management; Performance Evaluation; Business and Shareholder Relations
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      Heese, Jonas, Charles C.Y. Wang, and James Weber. "Introducing EVA at ISS: A Better Way to Evaluate CEO Performance and Compensation?" Harvard Business School Case 122-061, January 2022. (Revised February 2022.)
      • January 2022
      • Article

      Artificial Intelligence, Data-Driven Learning, and the Decentralized Structure of Platform Ecosystems

      By: David R. Clough and Andy Wu
      Gregory, Henfridsson, Kaganer, and Kyriakou (2020) highlight the important role of data and AI as strategic resources that platforms may use to enhance user value. However, their article overlooks a significant conceptual distinction: the installed base of...  View Details
      Keywords: Artificial Intelligence; Data Strategy; Ecosystem; Value Capture; Digital Platforms; Analytics and Data Science; Strategy; Learning; Value Creation; AI and Machine Learning; Technology Industry; Information Technology Industry; Video Game Industry; Advertising Industry
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      Clough, David R., and Andy Wu. "Artificial Intelligence, Data-Driven Learning, and the Decentralized Structure of Platform Ecosystems." Academy of Management Review 47, no. 1 (January 2022): 184–189.
      • October 2021 (Revised September 2022)
      • Case

      GoPro: Becoming a Subscription Hero

      By: Elie Ofek, Marco Bertini and Nicole Tempest Keller
      In 2021, Nick Woodman, founder and CEO of GoPro, was reviewing the company’s subscription offering, considering whether to extend it beyond benefits that were directly related to the company’s iconic camera. Founded in 2002, GoPro had gained renown for its innovative...  View Details
      Keywords: Subscription Model; Pricing; Lifestyle Brands; Value Proposition; Business Model; Growth and Development Strategy; Marketing Strategy; Consumer Products Industry; California
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      Ofek, Elie, Marco Bertini, and Nicole Tempest Keller. "GoPro: Becoming a Subscription Hero." Harvard Business School Case 522-022, October 2021. (Revised September 2022.)
      • June 2021 (Revised November 2021)
      • Case

      Asian Corporate Governance Association: Stemming a 'Race to the Bottom' by Stock Exchanges?

      By: Charles C.Y. Wang and Billy Chan
      This case describes the movement towards dual-class listings on Asian stock exchanges and the efforts of the Asian Corporate Governance Association (ACGA), a not-for-profit shareholder advocacy group, to discourage this trend. As a not-for-profit organization with no...  View Details
      Keywords: Corporate Governance; Governance Controls; Nonprofit Organizations; Stocks; Financial Markets; Financial Services Industry; Hong Kong; China; Asia
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      Wang, Charles C.Y., and Billy Chan. "Asian Corporate Governance Association: Stemming a 'Race to the Bottom' by Stock Exchanges?" Harvard Business School Case 121-073, June 2021. (Revised November 2021.)
      • April 2021
      • Case

      Transforming BlackBerry: From Smartphones to Software

      By: Ranjay Gulati and Nicole Tempest Keller
      On the verge of failure, BlackBerry brought in John Chen as CEO in 2013 to orchestrate a bold turnaround of the company. Once an iconic leader in the smartphone market, BlackBerry was best known for its tactile QWERTY keyboard, strong security, and a focus on business...  View Details
      Keywords: Pivot; Managing Change; Turnaround; Smartphone; Change Management; Leading Change; Transformation; Organizational Change and Adaptation; Digital Platforms; Change; Information Infrastructure; Applications and Software; Competitive Strategy; Cybersecurity; Technology Industry; Transportation Industry; Canada
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      Gulati, Ranjay, and Nicole Tempest Keller. "Transforming BlackBerry: From Smartphones to Software." Harvard Business School Case 421-052, April 2021.
      • January 2021 (Revised October 2021)
      • Case

      eToro: Building the World's Largest Social Trading Network

      By: Elie Ofek and Danielle Golan
      Social trading platform eToro was preparing for the launch of its expanded offering in the U.S. The company faced critical decisions regarding product-market fit, go-to-market strategy, positioning and monetization. Moreover, it faced the challenge of how best to make...  View Details
      Keywords: Social Trading Platform; Investment; Social and Collaborative Networks; Marketing Strategy; Expansion; Digital Platforms
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      Ofek, Elie, and Danielle Golan. "eToro: Building the World's Largest Social Trading Network." Harvard Business School Case 521-057, January 2021. (Revised October 2021.)
      • January 2021
      • Article

      ETF Activity and Informational Efficiency of Underlying Securities

      By: Lawrence Glosten, Suresh Nallareddy and Yuan Zou
      This paper investigates the effect of exchange-traded funds’ (ETFs’) activity on the short-run informational efficiency of their underlying securities. We find that ETF activity increases short-run informational efficiency for stocks with weak information environments....  View Details
      Keywords: ETF; Informational Efficiency; Co-movement; Systematic Earnings; Share Lending
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      Glosten, Lawrence, Suresh Nallareddy, and Yuan Zou. "ETF Activity and Informational Efficiency of Underlying Securities." Management Science 67, no. 1 (January 2021): 22–47.
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