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- 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...
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- 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....
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- 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...
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- November 2021 (Revised February 2022)
- 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...
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- 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...
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- October 2021
- Case
The 2012 Spanish Labor Reform: Lifting All Boats or Levelling 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...
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- 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...
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- 2021
- Working Paper
Multi-location Workers in Multinational Firms? Tradeoffs in Contextual Specialization of Employees and Organizational Outcomes
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,...
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- 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...
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- 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...
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- June 2021
- Article
Cognition and Emotion in Extreme Political Action: Individual Differences and Dynamic Interactions
By: Leor Zmigrod and Amit Goldenberg
Who is most likely to join and engage in extreme political action? While traditional theories have focused on situational factors or group identity attributes, an emerging science illustrates that tendencies for extreme political action may also be rooted in...
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- May 2021
- Article
Ideology and Composition Among an Online Crowd: Evidence From Wikipedians
By: Shane Greenstein, Grace Gu and Feng Zhu
Online communities bring together participants from diverse backgrounds and often face challenges in aggregating their opinions. We infer lessons from the experience of individual contributors to Wikipedia articles about U.S. politics. We identify two factors that...
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- April 2021 (Revised March 2022)
- Case
Slavery and Capitalism
By: Sophus A. Reinert and Cary Williams
The birth of “Modern Economic Growth” constituted a watershed in human history, allowing societies to escape the Malthusian impasse and permanently raise living standards. While the new growth regime had lifted billions of people out of extreme poverty over the last...
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- March 2021
- Case
P.F. Chang's
By: Ashish Nanda, Nitin Nohria and Margaret Cross
Excited yet apprehensive after being named CEO of P.F. Chang’s beginning July 1st, 2020, Damola Adamolekun was well aware of the extraordinary challenges facing the firm. The closure of businesses deemed “nonessential” owing to the COVID-19 pandemic had devastated the...
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- March 2021
- Article
The Crowd Emotion Amplification Effect
By: Amit Goldenberg, Erika Weisz, Timothy D. Sweeney, Mina Cikara and James Gross
How do people go about reading a room or taking the temperature of a crowd? When people catch a brief glimpse of an array of faces, they can only focus their attention on some of the faces. We propose that perceivers preferentially attend to faces exhibiting strong...
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- Article
How Long Can a Company Thrive Doing Just One Thing?
By: Andy Wu and Scott Duke Kominers
The news that the chat app Slack was being sold to veteran customer relationship management company Salesforce for $27.7 billion raised a lot of eyebrows. Why sell after a year of explosive growth? The deal, however, epitomizes a question facing so-called best-of-breed...
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- Article
Soul and Machine (Learning)
By: Davide Proserpio, John R. Hauser, Xiao Liu, Tomomichi Amano, Burnap Alex, Tong Guo, Dokyun (DK) Lee, Randall Lewis, Kanishka Misra, Eric Schwarz, Artem Timoshenko, Lilei Xu and Hema Yoganarasimhan
Machine learning is bringing us self-driving cars, medical diagnoses, and language translation, but how can machine learning help marketers improve marketing decisions? Machine learning models predict extremely well, are scalable to “big data,” and are a natural fit to...
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- July 2020
- Supplement
Instabeat—Crossing the Finish Line
By: Shikhar Ghosh, Nicole Tempest Keller and Alpana Thapar
Lebanese entrepreneur Hind Hobeika was just 21 years old when she launched her startup, Instabeat, which had developed the first real-time bio-feedback device for swimmers to monitor and improve their performance. It had been an extremely testing 10-year journey to...
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- July 2020
- Article
Yiqing xia zhongguo qiye de duice xuanze [Lessons from Chinese Companies' Response to COVID-19]
By: Das Narayandas, Vinay Hebar and Liangliang Li
China was weeks ahead of the rest of the world in dealing with the pandemic and its fallout. To understand what's next, the authors conducted a series of 20 in-depth, in-person interviews, as well as a large-scale survey of more than 350 senior executives to ascertain...
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- June 2020
- Case
Big Hit Entertainment and Blockbuster Band BTS: K-Pop Goes Global
By: Anita Elberse and Lizzy Woodham
Bang Si-Hyuk (‘Hitman Bang’) is the founder and co-chief executive officer of Big Hit Entertainment, the company behind BTS, a ‘K-pop’ band that has found unparalleled success around the globe—a remarkable feat given that most of their songs are in Korean. It is March...
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