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    • All HBS Web  (1,389)
      • Faculty Publications  (168)

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      • March 2023
      • Technical Note

      The Traits of Entrepreneurs

      By: Jo Tango and Alys Ferragamo
      Entrepreneurship has the potential for extreme success but also comes with high risks. Given this risk-reward profile, we might wonder why individuals choose to become entrepreneurs. Are there personality traits that lead someone to become an entrepreneur? Can you...  View Details
      Keywords: Entrepreneur; Innovation; Personality; Personality Traits; Risk Preference; Big Five; Locus Of Control
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      Tango, Jo, and Alys Ferragamo. "The Traits of Entrepreneurs." Harvard Business School Technical Note 823-099, March 2023.
      • 2023
      • Working Paper

      Complexity and Time

      By: Benjamin Enke, Thomas Graeber and Ryan Oprea
      We provide experimental evidence that core intertemporal choice anomalies -- including extreme short-run impatience, structural estimates of present bias, hyperbolicity and transitivity violations -- are driven by complexity rather than time or risk preferences. First,...  View Details
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      Enke, Benjamin, Thomas Graeber, and Ryan Oprea. "Complexity and Time." NBER Working Paper Series, No. 31047, March 2023.
      • February 2023
      • Article

      Homophily and Acrophily as Drivers of Political Segregation

      By: Amit Goldenberg, Joseph M. Abruzzo, Zi Huang, Jonas Schone, David Bailey, Robb Willer, Eran Halperin and James J. Gross
      Political segregation is an important social problem, increasing polarization and impeding effective governance. Previous work has viewed the central driver of segregation to be political homophily, the tendency to associate with others who have similar views. Here we...  View Details
      Keywords: Political Affiliation; Extremism; Values and Beliefs; Identity; Groups and Teams; Emotions; Civil Society or Community
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      Goldenberg, Amit, Joseph M. Abruzzo, Zi Huang, Jonas Schone, David Bailey, Robb Willer, Eran Halperin, and James J. Gross. "Homophily and Acrophily as Drivers of Political Segregation." Nature Human Behaviour 7, no. 2 (February 2023): 219–230.
      • 2022
      • Working Paper

      Overreaction and Diagnostic Expectations in Macroeconomics

      By: Pedro Bordalo, Nicola Gennaioli and Andrei Shleifer
      We present the case for the centrality of overreaction in expectations for addressing important challenges in finance and macroeconomics. First, non-rational expectations by market participants can be measured and modeled in ways that address some of the key challenges...  View Details
      Keywords: Overreaction; Rational Expectations; Macroeconomics; Market Participation; Social Psychology
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      Bordalo, Pedro, Nicola Gennaioli, and Andrei Shleifer. "Overreaction and Diagnostic Expectations in Macroeconomics." NBER Working Paper Series, No. 30356, August 2022.
      • July 2022
      • Case

      3G Capital

      By: Jo Tango and Alys Ferragamo
      In June 2022, 3G Capital Co-Managing Partners Alex Behring and Daniel Schwartz were in a partners’ meeting. On the agenda were three potential investments. Code named “Alpha,” “Beta,” and “Charlie,” they were the finalists amongst hundreds that the team had screened....  View Details
      Keywords: Investment Decisions; Investment Funds; Investment Portfolio; Decision Choices and Conditions; Private Equity
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      Tango, Jo, and Alys Ferragamo. "3G Capital." Harvard Business School Case 823-010, July 2022.
      • 2022
      • Chapter

      When Fifth Columns Fall: Religious Groups and Loyalty-Signaling in Erdoğan's Turkey

      By: Kristin Fabbe and Efe Murat Balıkçıoğlu
      This chapter investigates the role that fifth-column claims play in authoritarian politics. Specifically, it examines how fifth-column claims against the Gülen Movement have transformed the relationship between the Turkish state and both official (state-sanctioned)...  View Details
      Keywords: Fifth Columns; Gülen Movement; Political Islam; Government and Politics; Religion; Turkey
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      Fabbe, Kristin, and Efe Murat Balıkçıoğlu. "When Fifth Columns Fall: Religious Groups and Loyalty-Signaling in Erdoğan's Turkey." Chap. 10 in Enemies Within: The Global Politics of Fifth Columns, edited by Harris Mylonas and Scott Radnitz, 248–270. New York: Oxford University Press, 2022.
      • 2022
      • Working Paper

      Small Campaign Donors

      By: Laurent Bouton, Julia Cagé, Edgard Dewitte and Vincent Pons
      In this paper, we study the characteristics and behavior of small donors, and compare them to those of large donors. We first build a novel dataset including all the 340 million individual contributions reported to the U.S. Federal Election Commission between 2005 and...  View Details
      Keywords: Campaign Finance; Campaign Contributions; Small Donations; ActBlue; WinRed; TV Advertising; Political Elections; Finance; Demographics; Advertising; Analysis; Analytics and Data Science
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      Bouton, Laurent, Julia Cagé, Edgard Dewitte, and Vincent Pons. "Small Campaign Donors." NBER Working Paper Series, No. 30050, May 2022.
      • 2022
      • Working Paper

      Uniform Rate Setting and the Deposit Channel

      By: Juliane Begenau and Erik Stafford
      Banks do not completely pass-through changes in short-term market rates to depositors. The deposit channel of monetary policy proposes that banks choose the rate of pass-through across their branches based on local deposit market concentration, which consequently...  View Details
      Keywords: Banks and Banking; Financial Markets; Interest Rates; Banking Industry
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      Begenau, Juliane, and Erik Stafford. "Uniform Rate Setting and the Deposit Channel." Working Paper, May 2022.
      • April 6, 2022
      • Article

      In Uncertain Times, Big Companies Need to Take Care of Their Suppliers

      By: Willy C. Shih
      Many large original equipment manufacturers (OEMs) have long been ruthless with their suppliers, demanding extremely low prices and loading them up with risks. Given that the current turmoil buffeting global supply chains is unlikely to end anytime soon, OEMs should...  View Details
      Keywords: Supplier Relationship; Supply Chain Management; Supply Chain; Relationships; Risk and Uncertainty; Auto Industry; Industrial Products Industry; Manufacturing Industry; United States
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      Shih, Willy C. "In Uncertain Times, Big Companies Need to Take Care of Their Suppliers." Harvard Business Review Digital Articles (April 6, 2022).
      • February 2022 (Revised September 2022)
      • Case

      InstaDeep: AI Innovation Born in Africa (A)

      By: Shikhar Ghosh and Esel Çekin
      Karim Beguir and Zohra Slim were the co-founders of InstaDeep, a deep tech startup focusing on artificial intelligence (AI) solutions. Instadeep was one of the few companies globally that were partnering with DeepMind, an AI subsidiary of Google [Alphabet Inc.]....  View Details
      Keywords: AI; Artificial Intelligence; Entrepreneurship; Operations; Business Subsidiaries; Brands and Branding; Innovation and Invention; Growth and Development Strategy; AI and Machine Learning; Technology Industry; Africa
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      Ghosh, Shikhar, and Esel Çekin. "InstaDeep: AI Innovation Born in Africa (A)." Harvard Business School Case 822-104, February 2022. (Revised September 2022.)
      • February 2022 (Revised July 2022)
      • Supplement

      InstaDeep: AI Innovation Born in Africa (B)

      By: Shikhar Ghosh and Esel Çekin
      Karim Beguir and Zohra Slim were the co-founders of InstaDeep, a deep tech startup focusing on artificial intelligence (AI) solutions. Instadeep was one of the few companies globally that were partnering with DeepMind, an AI subsidiary of Google [Alphabet Inc.]....  View Details
      Keywords: AI; Artificial Intelligence; Entrepreneurship; Operations; Business Subsidiaries; Brands and Branding; Innovation and Invention; Growth and Development Strategy; AI and Machine Learning; Technology Industry; Africa
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      Ghosh, Shikhar, and Esel Çekin. "InstaDeep: AI Innovation Born in Africa (B)." Harvard Business School Supplement 822-105, February 2022. (Revised July 2022.)
      • 2022
      • Working Paper

      Calling All Issuers: The Market for Debt Monitoring

      By: Huaizhi Chen, Lauren Cohen and Weiling Liu
      A substantial fraction of local governments refinance their long-term debt with significant delays—resulting in sizable losses. Using data from 2001 to 2018, we estimate that U.S. municipals lost over $31 billion from this delayed refinancing, whereas the entire U.S....  View Details
      Keywords: Debt Monitoring; Financial Institutions; Governing Rules, Regulations, and Reforms; Government Administration; Financing and Loans
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      Chen, Huaizhi, Lauren Cohen, and Weiling Liu. "Calling All Issuers: The Market for Debt Monitoring." NBER Working Paper Series, No. 29790, February 2022.
      • Article

      Adaptive Machine Unlearning

      By: Varun Gupta, Christopher Jung, Seth Neel, Aaron Roth, Saeed Sharifi-Malvajerdi and Chris Waites
      Data deletion algorithms aim to remove the influence of deleted data points from trained models at a cheaper computational cost than fully retraining those models. However, for sequences of deletions, most prior work in the non-convex setting gives valid guarantees...  View Details
      Keywords: Machine Learning; AI and Machine Learning
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      Gupta, Varun, Christopher Jung, Seth Neel, Aaron Roth, Saeed Sharifi-Malvajerdi, and Chris Waites. "Adaptive Machine Unlearning." Advances in Neural Information Processing Systems (NeurIPS) 34 (2021).
      • November 2021 (Revised January 2023)
      • Case

      The Global Great Depression, 1929-1939

      By: Alberto Cavallo, Sophus A. Reinert and Federica Gabrieli
      The Great Depression was, by far, the worst economic contraction of the twentieth century, and some of the most important ideas about both fiscal and monetary policy in the second half of the century were developed in response to it. The economic collapse, which...  View Details
      Keywords: Great Depression; Economic Conditions; Unemployment; Homelessness; Financial Crisis; History; Economy; Policy; Poverty; Social Issues; Economic Slowdown and Stagnation
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      Cavallo, Alberto, Sophus A. Reinert, and Federica Gabrieli. "The Global Great Depression, 1929-1939." Harvard Business School Case 722-034, November 2021. (Revised January 2023.)
      • October 2021
      • Case

      (180) Days of Quibi

      By: David J. Collis and Terrence Shu
      Mobile streaming app Quibi was ready to take the entertainment world by storm at its April 2020 launch. Backed by $1.75 billion, influential investors from Hollywood to Wall Street eagerly anticipated early success for this brainchild of Meg Whitman, former CEO of...  View Details
      Keywords: Corporate Strategy; Strategy; Business Model; Business Startups; Mobile Technology
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      Collis, David J., and Terrence Shu. "(180) Days of Quibi." Harvard Business School Case 722-377, October 2021.
      • October 2021 (Revised November 2022)
      • Case

      The 2012 Spanish Labor Reform: Lifting All Boats, or Leveling Down?

      By: Vincent Pons, Rafael Di Tella, Santiago Botella and Elena Corsi
      Since 1978, Spain had struggled to control unemployment. The country’s labor law was protective of employees hired long-term and companies used temporary contracts as buffers. In 2012, amid economic recession and a 23.6% unemployment rate, a center-right government of...  View Details
      Keywords: COVID-19 Pandemic; Labor Market; Unemployment; Recession; Globalized Markets and Industries; Government Legislation; International Relations; Working Conditions; Employment; Labor Unions; Contracts; Social Issues; Public Opinion; Governing Rules, Regulations, and Reforms; Spain; European Union
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      Pons, Vincent, Rafael Di Tella, Santiago Botella, and Elena Corsi. "The 2012 Spanish Labor Reform: Lifting All Boats, or Leveling Down?" Harvard Business School Case 722-008, October 2021. (Revised November 2022.)
      • September 13, 2021
      • Article

      Managing Through Crunch Time—Without Burning Out Your Team

      By: Flavio Serapiao, Andrew Hill and Boris Groysberg
      Crunch times—the long, stressful hours of work that are often required in the final weeks before a new product launch—can have an inordinate impact on the success of businesses and they’re powerful shapers of organizational culture. Effective leaders understand that...  View Details
      Keywords: Leadership; Situation or Environment; Management Skills
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      Serapiao, Flavio, Andrew Hill, and Boris Groysberg. "Managing Through Crunch Time—Without Burning Out Your Team." Harvard Business Review Digital Articles (September 13, 2021).
      • 2021
      • Working Paper

      Multi-location Workers in Multinational Firms? Tradeoffs in Contextual Specialization of Employees and Organizational Outcomes

      By: Hise O. Gibson, Ryan W. Buell and Prithwiraj Choudhury
      We study how “contextual specialization,” the act of focusing workers’ organizational tasks within a particular locational context, and “contextual non-specialization,” the practice of diversifying workers’ organizational tasks among multiple locational contexts,...  View Details
      Keywords: Talent and Talent Management; Performance; Experience and Expertise; Selection and Staffing; Strength and Weakness; Personal Development and Career
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      Gibson, Hise O., Ryan W. Buell, and Prithwiraj Choudhury. "Multi-location Workers in Multinational Firms? Tradeoffs in Contextual Specialization of Employees and Organizational Outcomes." Harvard Business School Working Paper, No. 22-007, August 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 (Revised September 2021)
      • Case

      Sarah Robb O'Hagan: The Rocky Road of Passion

      By: Jon M. Jachimowicz and Francesca Gino
      In November 2018, Sarah Robb O’Hagan is reeling from an unceremonious exit as CEO of Flywheel, a chain of indoor cycling studios. In the past, Robb O’Hagan had led transformational change across companies throughout the sports and fitness industry, including as...  View Details
      Keywords: Personal Development and Career; Satisfaction; Decision Making; Problems and Challenges; Opportunities; Interests
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      Jachimowicz, Jon M., and Francesca Gino. "Sarah Robb O'Hagan: The Rocky Road of Passion." Harvard Business School Case 422-055, July 2021. (Revised September 2021.)
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