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      • 2022
      • Working Paper

      Retail Investors’ Contrarian Behavior Around News and the Momentum Effect

      By: Cheng (Patrick) Luo, Enrichetta Ravina, Marco Sammon and Luis M. Viceira
      Using a large panel of U.S. brokerage accounts trades and positions, we show that a large fraction of retail investors trade as contrarians after large earnings surprises, especially for loser stocks, and that such contrarian trading contributes to post earnings...  View Details
      Keywords: Retail Investors; Post Earnings Announcement Drift; Price Momentum; Behavioral Finance; Investment; Demographics
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      Luo, Cheng (Patrick), Enrichetta Ravina, Marco Sammon, and Luis M. Viceira. "Retail Investors’ Contrarian Behavior Around News and the Momentum Effect." Working Paper, June 2022.
      • Article

      Multitasking While Driving: A Time Use Study of Commuting Knowledge Workers to Assess Current and Future Uses

      By: Thomaz Teodorovicz, Andrew L. Kun, Raffaella Sadun and Orit Shaer
      Commuting has enormous impact on individuals, families, organizations, and society. Advances in vehicle automation may help workers employ the time spent commuting in productive work-tasks or wellbeing activities. To achieve this goal, however, we need to develop a...  View Details
      Keywords: In-vehicle User Interfaces; Time-use Study; Automated Vehicles; Knowledge Workers; Commuting
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      Teodorovicz, Thomaz, Andrew L. Kun, Raffaella Sadun, and Orit Shaer. "Multitasking While Driving: A Time Use Study of Commuting Knowledge Workers to Assess Current and Future Uses." International Journal of Human-Computer Studies 162 (June 2022).
      • June 2022
      • Article

      The Welfare Effects of Peer Entry in the Accommodation Market: The Case of Airbnb and the Accommodation Industry

      By: Chiara Farronato and Andrey Fradkin
      We study the effects of enabling peer supply through Airbnb in the accommodation industry. We present a model of competition between flexible and dedicated sellers—peer hosts and hotels—who provide differentiated products. We estimate this model using data from major...  View Details
      Keywords: Peer To Peer; Airbnb; Digital Platforms; Market Entry and Exit; Competition; Accommodations Industry
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      Farronato, Chiara, and Andrey Fradkin. "The Welfare Effects of Peer Entry in the Accommodation Market: The Case of Airbnb and the Accommodation Industry." American Economic Review 112, no. 6 (June 2022): 1782–1817.
      • May 2022 (Revised June 2022)
      • Case

      Proposing to Redesign a Global Investment Bank

      By: David G. Fubini
      A major, NYC-based, global investment bank is looking to rethink its Systems strategy amid a rapidly evolving digital landscape. Your firm has served the client across most of its major geographies on a range of substantial Systems and IT efforts, but is facing...  View Details
      Keywords: Consulting; Professional Services; Business and Stakeholder Relations; Digital Strategy; Presentations; Competitive Strategy; Consulting Industry; New York (city, NY)
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      Fubini, David G. "Proposing to Redesign a Global Investment Bank." Harvard Business School Case 422-096, May 2022. (Revised June 2022.)
      • May 2022
      • Case

      What to Propose?

      By: David G. Fubini
      Two audit and financial services firms, one of which your consulting firm has supported extensively, have merged to create one of the largest audit firms in the world. The audit firm's Executive Team has requested proposals aimed at re-evaluating their internal...  View Details
      Keywords: Consulting; Professional Services; Governance; Presentations; Organizational Structure; Transition; Mergers and Acquisitions; Consulting Industry
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      Fubini, David G. "What to Propose?" Harvard Business School Case 422-095, May 2022.
      • May 2022
      • Case

      The NFL’s $110-Billion Media Rights Deals

      By: Anita Elberse and Elizabeth Warner
      On March 18, 2021, Brian Rolapp, chief media and business officer at the National Football League (NFL) presented the results of a months-long effort to renegotiate rights deals with the NFL’s current partners in television—the media conglomerates behind the networks...  View Details
      Keywords: Sports; Entertainment; Media; Marketing; Strategy; General Management; Negotiation; Partners and Partnerships; Competition; Media and Broadcasting Industry; Sports Industry
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      Elberse, Anita, and Elizabeth Warner. "The NFL’s $110-Billion Media Rights Deals." Harvard Business School Case 522-090, May 2022.
      • May 2022
      • Case

      Executive Decision-Making at Zola

      By: Amy C. Edmondson and Michael Roberto
      In April 2020, Rachel Jarrett, President and COO of wedding technology company Zola, called a meeting with the organization’s key decision-makers. The company had previously launched three business expansions: a vendor marketplace, a wedding apparel division, and a...  View Details
      Keywords: Decision Making; Voting; Decision Choices and Conditions; Management Skills; Management; Management Style; Organizations; Organizational Culture; Technology Industry; Entertainment and Recreation Industry; United States
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      Edmondson, Amy C., and Michael Roberto. "Executive Decision-Making at Zola." Harvard Business School Case 622-074, May 2022.
      • May 2022
      • Article

      Can Gambling Increase Savings? Empirical Evidence on Prize-Linked Savings Accounts

      By: Shawn A. Cole, Benjamin Iverson and P. Tufano
      This paper studies the adoption and impact of prize-linked savings (PLS) accounts, which offer lottery-like payouts to individual account holders in lieu of interest. Using microlevel data from a bank in South Africa, we show that PLS is attractive to a broad group of...  View Details
      Keywords: Household Finance; Banking; Savings; Prize-linked Savings; Lottery; Household; Personal Finance; Saving; Banks and Banking
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      Cole, Shawn A., Benjamin Iverson, and P. Tufano. "Can Gambling Increase Savings? Empirical Evidence on Prize-Linked Savings Accounts." Management Science 68, no. 5 (May 2022): 3282–3308.
      • May 2022
      • Article

      Complex Disclosure

      By: Ginger Zhe Jin, Michael Luca and Daniel Martin
      We present evidence that unnecessarily complex disclosure can result from strategic incentives to shroud information. In our lab experiment, senders are required to report their private information truthfully, but can choose how complex to make their reports. We find...  View Details
      Keywords: Disclosure; Experiments; Naiveté; Overconfidence; Corporate Disclosure; Policy; Information; Complexity; Strategy; Consumer Behavior
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      Jin, Ginger Zhe, Michael Luca, and Daniel Martin. "Complex Disclosure." Management Science 68, no. 5 (May 2022): 3236–3261.
      • Article

      Present Bias Causes and Then Dissipates Auto-enrollment Savings Effects

      By: John Beshears, James J. Choi, David Laibson and Peter Maxted
      Present bias causes procrastination, which leads households to stick with auto-enrollment defaults. However, present bias also engenders overconsumption. Separation from each employer generates a rollover of 401(k) balances to an individual retirement account (IRA)...  View Details
      Keywords: Present Bias; Procrastination; Personal Finance; Decision Making; Social Psychology; Retirement
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      Beshears, John, James J. Choi, David Laibson, and Peter Maxted. "Present Bias Causes and Then Dissipates Auto-enrollment Savings Effects." AEA Papers and Proceedings 112 (May 2022): 136–141.
      • 2022
      • Article

      Probing GNN Explainers: A Rigorous Theoretical and Empirical Analysis of GNN Explanation Methods.

      By: Chirag Agarwal, Marinka Zitnik and Himabindu Lakkaraju
      As Graph Neural Networks (GNNs) are increasingly employed in real-world applications, it becomes critical to ensure that the stakeholders understand the rationale behind their predictions. While several GNN explanation methods have been proposed recently, there has...  View Details
      Keywords: Graph Neural Networks; Explanation Methods; Mathematical Methods; Framework; Theory; Analysis
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      Agarwal, Chirag, Marinka Zitnik, and Himabindu Lakkaraju. "Probing GNN Explainers: A Rigorous Theoretical and Empirical Analysis of GNN Explanation Methods." Proceedings of the International Conference on Artificial Intelligence and Statistics (AISTATS) 25th (2022).
      • April 2022
      • Case

      Pear Venture Capital

      By: Jo Tango and Alys Ferragamo
      Keith Bender, Principal at Pear Venture Capital, is working over the weekend to prepare for a Monday morning investment meeting. He has three startup pitch decks in front of him, and he must choose one to recommend at the meeting. He finds that each company has its...  View Details
      Keywords: Decision Choices and Conditions; Presentations; Business Startups; Investment; United States
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      Tango, Jo, and Alys Ferragamo. "Pear Venture Capital." Harvard Business School Case 822-097, April 2022.
      • April 6, 2022
      • Article

      5 Principles of Purposeful Leadership

      By: Hubert Joly
      The traditional model of the leader-hero who saves the day, knows it all, is the smartest person in the room, and is too often driven by power, fame, glory, or money is not appropriate in today’s environment. People today expect a different kind of leader. While each...  View Details
      Keywords: Leadership, Personal Strategy & Style; Purpose; Roles; Authenticity; Leadership; Values and Beliefs; Leadership Style
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      Joly, Hubert. "5 Principles of Purposeful Leadership." Harvard Business Review Digital Articles (April 6, 2022).
      • April 2022
      • Article

      Going Out or Opting Out? Capital, Political Vulnerability, and the State in China's Outward Investment

      By: Meg Rithmire
      How do state-business relations interact with outward investment in authoritarian regimes? This paper examines this question in the context of China’s rapid transformation into a major capital exporter. While most political economy scholarship focuses on firms’...  View Details
      Keywords: Outward Investment; Capital Controls; Corruption; Foreign Direct Investment; Political Economy; State-owned Enterprises; Investment; Global Range; Capital; Globalization; Policy; Government and Politics; China
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      Rithmire, Meg. "Going Out or Opting Out? Capital, Political Vulnerability, and the State in China's Outward Investment." Comparative Politics 54, no. 3 (April 2022): 477–499.
      • March 2022
      • Case

      Proximie: Using XR Technology to Create Borderless Operating Rooms

      By: Ariel D. Stern and Alpana Thapar
      In mid-January 2022, Nadine Hachach-Haram, founder and CEO of Proximie, was thinking about the company’s growth plans. Launched in 2016, Proximie was a platform that enabled clinicians, proctors, and medical device company personnel to be virtually present in operating...  View Details
      Keywords: Growth and Development Strategy; Technological Innovation; Partners and Partnerships; Strategic Planning; Health Industry; Lebanon; United Kingdom; United States
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      Stern, Ariel D., and Alpana Thapar. "Proximie: Using XR Technology to Create Borderless Operating Rooms." Harvard Business School Case 622-082, March 2022.
      • 2022
      • Working Paper

      The Credit Rating Agency Market in Africa

      By: Saveshen Pillay and Anywhere Sikochi
      In this paper, we present the credit rating agency market on the continent of Africa as a potential research setting for accounting-related research. Largely unexplored in prior literature, Africa-based rating agencies provide access to information about a broad range...  View Details
      Keywords: Credit Rating; Credit Rating Agencies; Regulation; Conflict Of Interest; Credit; Capital; Africa
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      Pillay, Saveshen, and Anywhere Sikochi. "The Credit Rating Agency Market in Africa." Harvard Business School Working Paper, No. 22-074, June 2022. (Journal of Financial Reporting, proposal accepted-in-principle.)
      • March 2022 (Revised April 2022)
      • Teaching Note

      Spotify's Audio-First Strategy: Leading the Podcasting Market

      By: Hong Luo and Carol Lin
      Teaching Note for HBS Case No. 721-439. Within 15 years, CEO Daniel Ek had led Spotify from an ambitious startup to a multi-billion dollar company that had transformed the music industry. As part of Spotify’s next phase of growth, the platform would invest heavily in...  View Details
      Keywords: Business Startups; Growth and Development Strategy; Business Divisions; Customer Relationship Management; Revenue; Music Industry
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      Luo, Hong, and Carol Lin. "Spotify's Audio-First Strategy: Leading the Podcasting Market." Harvard Business School Teaching Note 722-443, March 2022. (Revised April 2022.)
      • March 2022 (Revised March 2022)
      • Module Note

      Managing Customers in the Digital Era

      By: Eva Ascarza
      The last two decades have witnessed incredible technological advances that have transformed the ways customers connect with each other and enabled firms to track customers in multiple ways through various channels to personalize (and automize) their offerings at...  View Details
      Keywords: Customer Relationship Management; Customer Focus and Relationships; Technological Innovation
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      Ascarza, Eva. "Managing Customers in the Digital Era." Harvard Business School Module Note 522-066, March 2022. (Revised March 2022.)
      • March 2022
      • Case

      MTN: Unlocking Value While Driving Socioeconomic Progress

      By: Benjamin C. Esty, Pippa Tubman Armerding and Dilyana Karadzhova Botha
      On March 10, 2021, Ralph Mupita the new CEO of MTN Group, Africa largest telecommunications company, presented the group’s 2020 annual results and unveiled a new strategy to “drive growth and unlock value.” Despite MTN’s leadership in most of its markets, the company’s...  View Details
      Keywords: Decision Making; Goals and Objectives; Valuation; Emerging Markets; Business Strategy; Financial Management; Information Technology; Corporate Finance; Telecommunications Industry; Africa; South Africa; Ghana; Nigeria
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      Esty, Benjamin C., Pippa Tubman Armerding, and Dilyana Karadzhova Botha. "MTN: Unlocking Value While Driving Socioeconomic Progress." Harvard Business School Case 722-371, March 2022.
      • Article

      Advancing Digital Health Applications: Priorities for Innovation in Real-World Evidence Generation

      By: Ariel Dora Stern, Jan Brönneke, Jörg F Debatin, Julia Hagen, Henrik Matthies, Smit Patel, Ieuan Clay, Bjoern Eskofier, Annika Herr, Kurt Hoeller, Ashley Jaksa, Daniel B Kramer, Mattias Kyhlstedt, Katherine T Lofgren, Nirosha Mahendraratnam, Holger Muehlan, Simon Reif, Lars Riedemann and Jennifer C Goldsack
      In 2019, Germany passed the Digital Healthcare Act, which, among other things, created a “Fast-Track” regulatory and reimbursement pathway for digital health applications in the German market. The pathway explicitly provides for flexibility in how researchers can...  View Details
      Keywords: Digital Health; Health Care and Treatment; Technological Innovation
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      Stern, Ariel Dora, Jan Brönneke, Jörg F Debatin, Julia Hagen, Henrik Matthies, Smit Patel, Ieuan Clay, Bjoern Eskofier, Annika Herr, Kurt Hoeller, Ashley Jaksa, Daniel B Kramer, Mattias Kyhlstedt, Katherine T Lofgren, Nirosha Mahendraratnam, Holger Muehlan, Simon Reif, Lars Riedemann, and Jennifer C Goldsack. "Advancing Digital Health Applications: Priorities for Innovation in Real-World Evidence Generation." Lancet Digital Health 4, no. 3 (March 2022): e200–e206.
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