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Article

Why Build in Web3

By: Jad Esber and Scott Duke Kominers

A major change is coming to the internet. While today’s dominant platforms have guarded their troves of user data and maintained an advantage through network effects, new companies—working in what they're calling a “Web3” model—are proposing a new value proposition to... View Details

Keywords: Blockchain; User Experience; Digital Platforms; Network Effects; Internet and the Web; Competition; Web Services Industry

2022
Chapter

Lessons Learned from Support to Business during COVID-19

By: Gabriel Chodorow-Reich, Benjamin Iverson and Adi Sunderam

The authors survey the new federal subsidies and loans provided to businesses in the first year of the pandemic—including the Paycheck Protection Program (PPP), the Economic Injury Disaster Loan (EIDL) program, and aid targeted at specific industries such as airlines... View Details

Keywords: COVID-19 Pandemic; Small Business; Government Legislation; Policy

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

April 2022
Supplement

Mastercard Labs (B)

By: Linda A. Hill, Sunil Gupta, Emily Tedards and Julia Kelley

When Ajaypal (Ajay) Banga became the CEO of Mastercard in 2010, digital technologies were on the rise, and innovation needed to become a strategic imperative at the company. Banga tasked Garry Lyons, who had joined Mastercard through the 2009 acquisition of Orbiscom,... View Details

April 2022 (Revised May 2022)
Case

Mastercard Labs (A)

By: Linda A. Hill, Sunil Gupta, Emily Tedards and Julia Kelley

When Ajaypal (Ajay) Banga became the CEO of Mastercard in 2010, he shifted the company’s competitive focus from card networks to cash itself. Mastercard’s new vision of a “World Beyond Cash” distilled into a three-pronged framework: Grow the core business, Diversify... View Details

April 2022 (Revised May 2022)
Case

Mastercard Labs (A) (Abridged)

By: Linda A. Hill, Sunil Gupta, Emily Tedards and Julia Kelley

When Ajaypal (Ajay) Banga became the CEO of Mastercard in 2010, he shifted the company’s competitive focus from card networks to cash itself. Mastercard’s new vision of a “World Beyond Cash” distilled into a three-pronged framework: Grow the core business, Diversify... View Details

March 2022 (Revised May 2022)
Case

Winning Business at Russell Reynolds (A)

By: Ethan Bernstein and Cara Mazzucco

In an effort to make compensation drive collaboration, Russell Reynolds Associates’ (RRA) CEO Clarke Murphy sought to re-engineer the bonus system for his executive search consultants in 2016. As his HR analytics guru, Kelly Smith, points out, that risks upsetting–and... View Details

March 2022
Supplement

Winning Business at Russell Reynolds (B)

By: Ethan Bernstein and Cara Mazzucco

In an effort to make compensation drive collaboration, Russell Reynolds Associates’ (RRA) CEO Clarke Murphy sought to re-engineer the bonus system for his executive search consultants in 2016. As his HR analytics guru, Kelly Smith, points out, that risks upsetting–and... View Details

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

March 2022
Article

Estimating the Effectiveness of Permanent Price Reductions for Competing Products Using Multivariate Bayesian Structural Time Series Models

By: Fiammetta Menchetti and Iavor Bojinov

Researchers regularly use synthetic control methods for estimating causal effects when a sub-set of units receive a single persistent treatment, and the rest are unaffected by the change. In many applications, however, units not assigned to treatment are nevertheless... View Details

Keywords: Causal Inference; Partial Interference; Synthetic Controls; Bayesian Structural Time Series; Mathematical Methods

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February 2022
Case

NFX Capital and Moov Technologies

By: Scott Duke Kominers and Nicole Tempest Keller

In July 2019, James Currier, a general partner at San Francisco-based NFX Ventures, was considering a seed stage investment of $1.5 million in Moov Technologies, a B2B marketplace for used industrial equipment. NFX was a venture capital firm focused on seed-stage... View Details

Keywords: Venture Capital; Network Effects; Marketplace Matching; Digital Platforms; Market Design; Applications and Software; Semiconductor Industry; Financial Services Industry; San Francisco

January 2022 (Revised April 2025)
Case

Steem Versus Hive: Testing Blockchain Governance

By: Shikhar Ghosh and Shweta Bagai

This case examines a pivotal governance conflict that occurred in 2020 when Justin Sun, founder of the TRON blockchain, acquired Steemit Inc., the company behind a popular social media platform operating on the Steem blockchain. Steem, launched in 2016 by Daniel... View Details

Keywords: Blockchain; Mergers and Acquisitions; Values and Beliefs; Corporate Governance; Organizational Culture; Technology Industry

January 2022
Teaching Plan

Just Arrived: Integrating Refugees in Sweden

By: Brian Trelstad and Emilie Billaud

Teaching Plan for HBS Case No. 321-040. Just Arrived is an online platform that matches newly-arrived immigrants in Sweden with employment opportunities. As one of several for-profit and non-profit start-ups in Europe that is looking to address the refugee crisis, the... View Details

Keywords: Immigration; Refugees; Employment; Integration; Business Model; Social Entrepreneurship; Growth and Development Strategy; Employment Industry; Sweden; Italy; Germany

December 2021
Article

Cash-for-Information Whistleblower Programs: Effects on Whistleblowing and Consequences for Whistleblowers

By: Aiyesha Dey, Jonas Heese and Gerardo Pérez Cavazos

We study the effect of financial incentives on whistleblowing and the consequences for whistleblowers under the cash-for-information program of the False Claims Act (FCA). Exploiting appeals-court decisions that increase financial incentives for whistleblowing, we find... View Details

Keywords: Whistleblowers; Cash-for-information Whistleblower Programs; False Claims Act; Corporate Misconduct; Consequences For Whistleblowers; Crime and Corruption; Information; Cost

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2021
Chapter

Generating Social Entrepreneurship Knowledge: International Research Collaboration on a Hemispheric Level

By: James E. Austin, Gabriel Berger, Rosa Amelia González, Roberto Gutiérrez, Iván D. Lobo and Alfred Vernis

Provide insights on how social entrepreneurship (SE) knowledge can be more effectively generated by universities through the entrepreneurial creation and effective management of a knowledge network centered on international collaborative research; illuminate how one... View Details

Keywords: Social Entrepreneurship; Knowledge; Networks; Collaborative Innovation and Invention; Global Range

November 2021 (Revised January 2022)
Case

Scott Tucker (A): Race to the Top

By: Aiyesha Dey and Amram Migdal

The case tells the story of the rise and fall of Scott Tucker, an entrepreneur, businessman, passionate race car driver, competitor, and owner of a professional racing team. From 1997 to 2012, Tucker built a nationwide network of payday lending businesses, becoming a... View Details

Keywords: Business Ventures; Crime and Corruption; Ethics; Fairness; Financing and Loans; Personal Finance; Governance; Corporate Accountability; Corporate Governance; Governance Compliance; Governance Controls; Financial Services Industry; United States

November 2021 (Revised January 2022)
Supplement

Scott Tucker (B): The Feds Catch Up

By: Aiyesha Dey and Amram Migdal

The case tells the story of the rise and fall of Scott Tucker, an entrepreneur, businessman, passionate race car driver, competitor, and owner of a professional racing team. From 1997 to 2012, Tucker built a nationwide network of payday lending businesses, becoming a... View Details

Keywords: Business Ventures; Crime and Corruption; Ethics; Fairness; Financing and Loans; Personal Finance; Governance; Corporate Accountability; Corporate Governance; Governance Compliance; Governance Controls; Financial Services Industry; United States

November 2021
Supplement

Ant Group (B)

By: Krishna G. Palepu, Feng Zhu and Susie L. Ma

Keywords: Information Technology; Value Creation; Network Effects; Strategy; Disruptive Innovation; Technology Industry; Financial Services Industry; China

2021
Working Paper

Friends and Family Money: P2P Transfers and Financially Fragile Consumers

By: Tetyana Balyuk and Emily Williams

We assess the impact that real time money transfer technology has on consumer outcomes, particularly during periods of financial fragility. We do this by developing a new data set that documents use of Zelle—the most widely used P2P money transfer technology in the... View Details

Keywords: P2P Money Transfers; Real Time Payments; Fintech; Finance; Information Technology; Personal Finance; Financial Condition

November 2021
Article

Ratings, Reviews, and the Marketing of New Products

By: Itay P. Fainmesser, Dominique Olié Lauga and Elie Ofek

We study how user-generated content (UGC) about new products impacts a firm's advertising and pricing decisions and the effect on profits and market dynamics. We construct a two-period model where consumers value quality and are heterogeneous in their taste for the new... View Details

Keywords: Online Reviews; Product Ratings; Social Networks; Word Of Mouth; Pricing; User-generated Content; Advertising; Product Marketing; Price; Consumer Behavior; Product Positioning; Social Media

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