Publications

September 2023 (Revised January 2024)
Case

Icahn Enterprises: Ponzi Scheme or Sound Investment

By: Aiyesha Dey, Jonas Heese and James Weber

Icahn Enterprises, a publicly traded limited partnership founded and operated by famed activist investor Carl Icahn, had earned above market returns for over a decade. Between 2018 and early 2023, it had a compound annual return of 31%. Icahn invested in undervalued... View Details

Keywords: Stock Shares; Investment Return; Business Model; Valuation; Financial Services Industry

September 2023
Teaching Note

Patagonia: 'Earth Is Now Our Only Shareholder'

By: Brian Trelstad, Nien-hê Hsieh, Michael Norris and Susan Pinckney

Teaching Note for HBS Case No. 323-057. Patagonia’s change of ownership from a privately held company to a perpetual purpose trust and 501(c)(4) nonprofit in order to use the company’s profit to fight the environmental crisis and be a model for future businesses. View Details

September 2023
Module Note

Live Case Exercise for Financial Reporting

By: Tatiana Sandino and Marshal Herrmann

Harvard Business School employs the case method as a cornerstone of its pedagogy, providing students with opportunities to engage in discussions related to difficult or contentious decisions confronted by real-world organizations. In this “live case,” we depart from... View Details

Keywords: Financial Reporting; Research; Corporate Disclosure

September 2023 (Revised October 2024)
Case

Forecasting Climate Risks: Aviva’s Climate Calculus

By: Mark Egan and Peter Tufano

In late 2021, Ben Carr, Director of Analytics and Capital Modeling at Aviva Plc (Aviva)—a leading insurer with core operations in the UK, Ireland and Canada,—was preparing for an upcoming presentation before the company's board which included its CEO, Amanda Blanc,... View Details

Keywords: Climate Risk; Climate Finance; Forecasting; Insurance; Risk Measurement; Climate Change; Risk Management; Forecasting and Prediction; Insurance Industry; United States

September 2023 (Revised July 2024)
Case

Going Mobile-First? The Digital Transformation of Davivienda Bank in Colombia

By: Jorge Tamayo and Jenyfeer Martinez Buitrago

Set in 2017, this case describes the digital transformation strategy of Davivienda— a leading player in Colombia’s commercial banking and one of the companies belonging to Grupo Bolívar, a major Colombian financial conglomerate. The case also describes the pioneer role... View Details

Keywords: Change Management; Transformation; Decision Choices and Conditions; Information Technology; Digital Strategy; Digital Transformation; Internet and the Web; Mobile and Wireless Technology; Innovation and Management; Innovation Strategy; Growth and Development Strategy; Business Strategy; Banking Industry; Latin America; Central America; South America; Colombia

September 2023
Teaching Note

Apple’s iPhone Revolution: Pioneering the Circular Economy

By: George Serafeim

Teaching Note for HBS Case 123-089. The case describes the Trade-In system for iPhones that allow iPhones to be refurbished and reused or to be recycled. The case provides information for the students to analyze the financial attractiveness of the Trade-In system and... View Details

Keywords: Iphone; Smartphone; Technology; Business Model Innovation; Carbon Emissions; Recycling; Business Model; Product Design; Climate Change; Environmental Sustainability; Green Technology; Technology Industry

September 2023
Supplement

Super Quantum: Using Artificial Intelligence to Transform Asset Management (B)

By: Feng Zhu and Kerry Herman

Dr. Zhang, CEO of Super Quantum, an AI-driven hedge fund, is considering an investor’s request to withdraw their funds as the markets experience volatility. Should he pull the investor’s funds?” View Details

Keywords: Hedge Fund; Volatility; Decision Choices and Conditions; Asset Management; Investment Funds; Financial Services Industry

September 2023
Case

Super Quantum: Using Artificial Intelligence to Transform Asset Management (A)

By: Feng Zhu and Kerry Herman

Dr. Zhang, CEO of Super Quantum, an AI-driven hedge fund, is considering an investor’s request to withdraw their funds as the markets experience volatility. Should he pull the investor’s funds? View Details

Keywords: AI and Machine Learning; Volatility; Financial Markets; Investment Funds; Decision Choices and Conditions; Financial Services Industry

September 2023
Case

Diamond Standard

By: Lauren H. Cohen, Zhaoheng Gong and Grace Headinger

Cormac Kinney, Founder and CEO of Diamond Standard, was on a mission to transform the U.S. diamond market through unlocking the precious gems as market-traded assets. As a serial FinTech entrepreneur, he hoped to add an additional service to his vault: Carats. The... View Details

2023
Working Paper

Incentivizing Innovation in Open Source: Evidence from the GitHub Sponsors Program

By: Annamaria Conti, Vansh Gupta, Jorge Guzman and Maria P. Roche

Open source is key to innovation, but we know little about how to incentivize it. In this paper, we examine the impact of a program providing monetary incentives to motivate innovators to contribute to open source. The Sponsors program was introduced by GitHub in... View Details

Keywords: Open Source Distribution; Innovation and Invention; Motivation and Incentives; Technology Industry

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September 2023
Article

Stock Price Reactions to ESG News: The Role of ESG Ratings and Disagreement

By: George Serafeim and Aaron Yoon

We investigate whether ESG ratings predict future ESG news and the associated market reactions. We find that the consensus rating predicts future news, but its predictive ability diminishes for firms with large disagreement between raters. Relation between news and... View Details

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September–October 2023
Article

The New Era of Industrial Policy Is Here

By: Willy C. Shih

Governments around the world are increasingly intervening in the private sector through industrial policies designed to help domestic sectors reach goals that markets alone are unlikely to achieve. Companies in targeted sectors—such as automakers, energy companies, and... View Details

Keywords: Policy; Government and Politics; Business and Government Relations; Research and Development; Economic Sectors

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2023
Working Paper

The Stock Market and Bank Risk-Taking

By: David S. Scharfstein and Antonio Falato

Using confidential supervisory risk ratings, we document that banks increase risk after they go public compared to a control group of banks that filed to go public but withdrew their filings for plausibly exogenous reasons. The increase in risk increases short-term... View Details

Keywords: Risk and Uncertainty; Banks and Banking; Going Public; Performance; Stocks

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October 2023
Article

What Does the Inflation Reduction Act Mean for Patients and Physicians?

By: Amitabh Chandra and Benedic Ippolito

The debate around prescription drug measures in the recently passed U.S. Inflation Reduction Act (IRA), which limit some patients’ out-of-pocket costs, has not fully addressed their effect on physicians and patients via their effect on payers. Reducing patients’ costs... View Details

Keywords: Government Legislation; Price; Health Care and Treatment

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August 2023 (Revised October 2024)
Case

Accounting Outages at Plug Power? (A)

By: Jonas Heese, Joseph Pacelli and James Barnett

Set immediately after a December 2019 short-seller attack, the case explores Plug Power’s long challenging history. It then focuses on two key issues raised in the short-seller report related to lease accounting and stock warrants that Plug purportedly used to boost... View Details

Keywords: Accounting; Environmental Accounting; Financial Reporting; Ethics; Management; Social Enterprise; Investment; Stocks; Energy Industry; Green Technology Industry; United States; Europe

August 2023 (Revised October 2024)
Supplement

Accounting Outages at Plug Power? (B)

By: Jonas Heese, Joseph Pacelli and James Barnett

The case is set in spring 2021, immediately after Plug Power made financial restatements dating back to 2018. The case describes the restatements, which revealed that Plug was reclassifying expense items to boost gross profits. View Details

Keywords: Environmental Accounting; Financial Reporting; Ethics; Profit; Management; Social Enterprise; Energy Industry; Green Technology Industry; United States; Europe

August 2023 (Revised March 2024)
Case

Raya Partners: Profitability and Purpose

By: Arthur Segel, Ephraim Mernick and Olivia Barba

Raya Partners, a private equity firm, faces a crucial decision regarding Asa Specialty Coatings Company (ASCC). The dilemma involves shifting ASCC's manufacturing operations to Mexico, a move that would boost profitability and reduce emissions but result in significant... View Details

Keywords: Factories, Labs, and Plants; Communication Strategy; Private Equity; Job Cuts and Outsourcing; Corporate Social Responsibility and Impact; Mexico; Vermont

August 2023 (Revised January 2024)
Supplement

Arla Foods: Data-Driven Decarbonization (A)

By: Michael Parzen, Michael W. Toffel, Amram Migdal and Susan Pinckney

Arla implemented a data-based price incentive system to measure, track, and influence climate friendly changes to reduce CO2 emissions across the world’s fourth largest dairy cooperative. View Details

Keywords: Dairy Industry; Business Earnings; Earnings Management; Environmental Accounting; Agribusiness; Animal-Based Agribusiness; Acquisition; Mergers and Acquisitions; Decision Making; Decisions; Voting; Environmental Management; Climate Change; Environmental Regulation; Environmental Sustainability; Green Technology; Pollution; Moral Sensibility; Values and Beliefs; Financial Strategy; Price; Profit; Revenue; Food; Geopolitical Units; Global Strategy; Ownership Type; Cooperative Ownership; Performance Efficiency; Performance Evaluation; Problems and Challenges; Natural Environment; Science-Based Business; Business Strategy; Commercialization; Cooperation; Corporate Strategy; Food and Beverage Industry; Agriculture and Agribusiness Industry; Europe; United Kingdom; European Union; Germany; Denmark; Sweden; Luxembourg; Belgium

August 2023 (Revised March 2024)
Case

Arla Foods: Data-Driven Decarbonization (A)

By: Michael Parzen, Michael W. Toffel, Susan Pinckney and Amram Migdal

The case describes Arla’s history, in particular its climate change mitigation efforts, and how it implemented a price incentive system to motivate individual farms to implement scope 1 greenhouse gas emissions mitigation measures and receive a higher milk price. The... View Details