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      • Faculty Publications  (121)

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      • 2022
      • 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, October 2022.
      • September 2022 (Revised October 2022)
      • 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 October 2022.)
      • 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.)
      • 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.
      • 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.
      • Article

      Healthy Buildings in 2070

      By: John D. Macomber and Joseph G. Allen
      Fifty years seems a very long time in the future for most industries. Not so in buildings and real estate; built structures routinely last decades if not hundreds of years, as long as they are economically competitive. Any discussion of the 50-year future has to...  View Details
      Keywords: Health & Wellness; Real Estate; Architectural Innovation; Public Health; Health; Buildings and Facilities; Well-being
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      Macomber, John D., and Joseph G. Allen. "Healthy Buildings in 2070." The Bridge 50, no. S (Winter 2020): 11–14. (Special 50th Anniversary Issue edited by Ronald M. Latanision.)
      • 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.)
      • September 2020
      • Teaching Note

      First Aid Beauty

      By: Karen G. Mills and Annie Dang
      Teaching Note for HBS Case No. 319-082.  View Details
      Keywords: Entrepreneurship; Venture Capital; Term Sheets; Decision Choices And Conditions; Preferred Shares; Common Stock; Beauty and Cosmetics Industry
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      Mills, Karen G., and Annie Dang. "First Aid Beauty." Harvard Business School Teaching Note 321-013, September 2020.
      • June 2020 (Revised October 2020)
      • Case

      Muddy Waters vs. eHealth: The Debate of a 'Lifetime'

      By: Jonas Heese and Cristo Liautaud
      In May 2020, an analyst was assessing eHealth’s performance. eHealth was an online / tele-sales broker of health insurance products. The stock had recently hit all-time highs, closing at a peak of $146 on March 4, 2020. But now, May 4, 2020, eHealth traded at $103. The...  View Details
      Keywords: Revenue Recognition; Health; Insurance; Online Technology; Insurance Industry
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      Heese, Jonas, and Cristo Liautaud. "Muddy Waters vs. eHealth: The Debate of a 'Lifetime'." Harvard Business School Case 120-114, June 2020. (Revised October 2020.)
      • May 2020 (Revised August 2021)
      • Case

      Playing the Field: Competing Bids for Anadarko Petroleum Corp

      By: E. Scott Mayfield, Daniel Green and Benjamin C. Esty
      On April 8, 2019, Occidental’s CEO Vicki Hollub made a private offer to buy Anadarko Petroleum Corporation for $72 in cash and stock. Anadarko's CEO Al Walker said he would consider the offer, yet three days later, on April 11, he signed a merger agreement with Chevron...  View Details
      Keywords: Mergers and Acquisitions; Bids and Bidding; Decision Making; Cost vs Benefits
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      Mayfield, E. Scott, Daniel Green, and Benjamin C. Esty. "Playing the Field: Competing Bids for Anadarko Petroleum Corp." Harvard Business School Case 220-087, May 2020. (Revised August 2021.)
      • January 2020 (Revised July 2020)
      • Supplement

      MoviePass: The 'Get Big Fast' Strategy

      By: Benjamin C. Esty and Daniel Fisher
      In August 2017, MoviePass dramatically lowered its subscription price from $50 per month to just $10 for up to one movie per day. The idea was to rapidly scale the business to the point where they could generate incremental revenue streams form related businesses...  View Details
      Keywords: Market Entry; Growth Strategy; Profit Vs. Growth; Subscription Business; Cash Burn; Data Analytics; Get-big-fast; Buyer Power; Strategy Implementation; Movie Industry; Racing; Business Strategy; Value Creation; Consolidation; Cash Flow; Growth Management; Business Startups; Entrepreneurship; Disruptive Innovation; Mobile Technology; Motion Pictures and Video Industry; Entertainment and Recreation Industry; Advertising Industry; Information Industry; United States
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      Esty, Benjamin C., and Daniel Fisher. "MoviePass: The 'Get Big Fast' Strategy." Harvard Business School Spreadsheet Supplement 720-854, January 2020. (Revised July 2020.)
      • November 2019
      • Case

      Apple, Einhorn, and iPrefs (Abridged)

      By: Carliss Y. Baldwin and W. Carl Kester
      In March 2013, Apple Computer has a very large cash balance, and is under pressure to return cash to shareholders. Hedge fund manager David Einhorn thinks Apple can "unlock value" by issuing perpetual preferred stock, dubbed iPrefs. Henry Blodget, CEO of Business...  View Details
      Keywords: Markets; Stock Shares; Value Creation; Business and Shareholder Relations
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      Baldwin, Carliss Y., and W. Carl Kester. "Apple, Einhorn, and iPrefs (Abridged)." Harvard Business School Case 220-043, November 2019.
      • September 2019
      • Case

      JTC: Stronger Together with Shared Ownership

      By: Ethan Bernstein and Daniela Beyersdorfer
      Nigel Le Quesne, CEO of Jersey-based financial services firm JTC, firmly believed that "shared ownership" was at the heart of his company’s successful track record. The firm had seen its revenues, profits, and number of clients and staff grow steadily throughout its...  View Details
      Keywords: Ownership; Employee Ownership; Leadership Style; Compensation and Benefits; Organizational Culture; Employee Stock Ownership Plan; Going Public; Mission and Purpose; Management Practices and Processes; Human Resources; Financial Services Industry; Channel Islands; Europe; United States
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      Bernstein, Ethan, and Daniela Beyersdorfer. "JTC: Stronger Together with Shared Ownership." Harvard Business School Case 420-008, September 2019.
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