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June 2025
Case

Accounting for OpenAI at Microsoft

By: Jonas Heese, Joseph Pacelli, Nicole Zelazko and Michael Norris

In early 2025, Microsoft was evaluating the impact of its $14 billion investment in OpenAI. As OpenAI’s computing needs expanded, Microsoft positioned Azure as the exclusive provider for training and inference of their large language models. Despite the scale of the... View Details

Keywords: Accounting; Financial Reporting; Revenue Recognition; Corporate Finance; Capital; Investment; Revenue; AI and Machine Learning; Valuation; Governance; Technology Industry; Financial Services Industry; Web Services Industry; Information Technology Industry; United States

June 2025
Teaching Note

Arla Foods: Data-Driven Decarbonization

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

Teaching note for Arla Arla Foods: Data-Driven Decarbonization (A), HBS No. 624-003 View Details

2025
Working Paper

How Firms Respond to Worker Activism: Evidence from Global Supply Chains

By: Yanhua Bird, Jodi L. Short and Michael W. Toffel

Social movement pressures can lead organizations to concede and improve social performance to avoid disruption costs, but we theorize that such responses evoke concession costs that prompt organizations to shift resources and attention from other social domains whose... View Details

Keywords: Worker Activism; Labor Standards; Tradeoffs; Global Supply Chains; Internal Governance Structure; Public Opinion; Supply Chain; Corporate Accountability; Corporate Social Responsibility and Impact; Working Conditions

May 2025
Teaching Note

Calyx Global: Rating Carbon Credits

By: Michael W. Toffel and Adam Chen

Teaching note to support the Calyx Global: Ratinng Carbon Credits case (HBS No. 625-102) View Details

May 2025 (Revised June 2025)
Supplement

Michael Ku and Global Clinical Supply at Pfizer Inc.: Bringing Hope to Patients (D)

By: Linda A. Hill and Lydia Begag

This fourth installment in the Pfizer Global Clinical Supply (GCS) transformation case series highlights how over a decade of cultural and digital evolution positioned GCS to meet unprecedented global challenges. In 2011, Michael Ku became the Vice President of GCS and... View Details

May–June 2025
Article

Branch-and-Price for Prescriptive Contagion Analytics

By: Alexandre Jacquillat, Michael Lingzhi Li, Martin Ramé and Kai Wang

Contagion models are ubiquitous in epidemiology, social sciences, engineering, and management. This paper formulates a prescriptive contagion analytics model where a decision maker allocates shared resources across multiple segments of a population, each governed by... View Details

Keywords: COVID-19; Mathematical Methods

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May–June 2025
Article

Slowly Varying Regression Under Sparsity

By: Dimitris Bertsimas, Vassilis Digalakis Jr, Michael Lingzhi Li and Omar Skali Lami

We consider the problem of parameter estimation in slowly varying regression models with sparsity constraints. We formulate the problem as a mixed integer optimization problem and demonstrate that it can be reformulated exactly as a binary convex optimization problem... View Details

Keywords: Mathematical Methods; Analytics and Data Science

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May–June 2025
Article

Sustainability as a Business-Model Transformation

By: Ivanka Visnjic, Felipe Monteiro and Michael L. Tushman

Many global companies have made public commitments to sustainability targets. Fulfilling these commitments will require firms to transform their business models and organizational architectures. A few pioneers are leading the way, demonstrating that companies can make... View Details

Keywords: Environmental Sustainability; Business Model

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April 2025 (Revised June 2025)
Supplement

Arla Foods: Data-Driven Decarbonization (A) and (B) PowerPoint Supplement

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

Arla implemented a data based price incentive systems 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; Food and Beverage Industry; Europe; European Union; United Kingdom; Germany; Denmark; Sweden; Netherlands; Luxembourg; Belgium

April 2025
Background Note

Climate Change Adaptation with Artificial Intelligence and Machine Learning

By: Michael W. Toffel and Nabig Chaudhry

Artificial Intelligence (AI) and machine learning (ML) have emerged as powerful tools to address climate change. This note summarizes a wide range of the uses of AI/ML to drive climate change adaptation and resilience, the measures organizations and governments are... View Details

Keywords: Climate Change; Adaptation

April 2025
Teaching Note

Allbirds: Decarbonizing Fashion (A) and (B)

By: Michael W. Toffel, Ken Pucker and Stacy Straaberg

Teaching Note for HBS Case Nos. 622-024, 625-004, 625-005, and 625-702. The Allbirds: Decarbonizing Fashion (A) case introduces Allbirds as a footwear startup not only focused on simple design, comfort, and sustainable natural materials but on decarbonizing the wider... View Details

April 2025
Supplement

Allbirds: Decarbonizing Fashion PowerPoint Supplement

By: Michael W. Toffel, Ken Pucker and Stacy Straaberg

The Allbirds: Decarbonizing Fashion (A) case introduces Allbirds as a footwear startup not only focused on simple design, comfort, and sustainable natural materials but on decarbonizing the wider fashion industry. Background material highlights the growing... View Details

Keywords: Decarbonization; Climate Impact; Environmental Strategy; Innovation; Product Design; Supply Chain Management; Innovation Strategy; Innovation and Management; Product Development; Climate Change; Environmental Management; Environmental Sustainability; Apparel and Accessories Industry; Fashion Industry; United States; California

April 2025
Supplement

Columbia's Final Mission (B)

By: Amy C. Edmondson, Richard M. Bohmer and Michael A. Roberto

Pre-abstract: Instructors should consider the timing of making videos available to students, as they may reveal key case details. View Details

April 2025
Supplement

#FutureFresenius: 'Committed to Life' in 2024 and Beyond (B)

By: David J. Collis, Benjamin C. Esty and Haisley Wert

From February 2024 onward, Fresenius SE & Co. KGaA continued to make progress on the #FutureFresenius transformation that CEO Michael Sen had initiated in October 2022. The company had completed the initial "reset" phase and moved into the "revitalize" portion of the... View Details

Keywords: Corporate Strategy; Finance; Transformation; Leading Change; Health Industry; United States; Germany

April 2025
Case

#FutureFresenius: Implementing a New Strategy to Transform the Company and Advance Patient Care

By: David J. Collis, Benjamin C. Esty and Haisley Wert

In February 2024, Fresenius CEO Michael Sen reflected on the company’s transformation journey from his office in Bad Homburg, Germany. With revenues of €22 billion and a mission to advance patient care, Fresenius had built a strong reputation through decades of... View Details

Keywords: Strategic Planning; Corporate Strategy; Transformation; Finance; Leading Change; Organizational Culture; Organizational Structure; Alignment; Health Industry; Germany; United States

April 8, 2025
Article

Creating Workplaces Free of Forever Chemicals

By: Joseph G. Allen, Heather A. Henrikson and Michael W. Toffel

Forever chemicals are toxic and widely used in buildings and yet they remain on the rise globally with little regulation to control them. In the United States, for example, Environmental Protection Agency (EPA) regulations currently cover only forever chemicals in... View Details

Keywords: Occupational Health; Safety Regulations; Regulation; Working Conditions; Governing Rules, Regulations, and Reforms; Safety; Health

March 2025
Case

Hurtigruten: Sea Zero

By: Christian Kaps and Michael W. Toffel

Hurtigruten was deciding whether the next ship they built should be fully electric. But such a vessel's battery, the size of electric cars, needed to be charged on the ship's multi-day voyage along the Norwegian coast. Before making such a $250 million investment, the... View Details

Keywords: Energy Sources; Alternative Energy; Ship Transportation; Environmental Regulation; Environmental Sustainability; Innovation and Management; Green Technology; Investment; Corporate Social Responsibility and Impact; Shipping Industry; Tourism Industry; Transportation Industry; Travel Industry; Battery Industry; Norway; Europe

March 2025
Case

Calyx Global: Rating Carbon Credits

By: Michael W. Toffel and Adam Chen

This case describes how rating agencies and other organizations are seeking to improve the quality of carbon credits sold in the voluntary carbon market to organizations seeking to use them to supplement their internal decarbonization efforts to meet their net zero... View Details

Keywords: Service Design; Certification; Auditing; Auditor Reputation; Carbon Credits; Carbon; Rating Agency Disagreement; Ratings; Climate Change; Business Model; Environmental Sustainability; Corporate Social Responsibility and Impact; Conflict of Interests; Reputation; Business Strategy

March 2025
Case

Skylight: Hit Product or Scalable Company?

By: Rembrand Koning, Christina Wallace and Jeff Huizinga

Skylight, originally a digital frame startup aimed at connecting dispersed families, expanded with a second product—Calendar—to help families manage schedules. Despite significant potential, Calendar struggled with persistent technical issues and poor customer... View Details

Keywords: Culture; Software; Hardware; Entrepreneurship; Business Startups; Customer Satisfaction; Resource Allocation; Product Launch; Business Strategy; Expansion

March 10, 2025
Article

How Gen AI Could Change the Value of Expertise

By: Joseph Fuller, Matt Sigelman and Michael Fenlon

In the near future, gen AI is likely to affect some 50 million jobs, automating away elements of some jobs and augmenting workers’ abilities in others. The extent of those changes will compel companies to reshape their organizational structures and rethink their talent... View Details

Keywords: AI and Machine Learning; Job Cuts and Outsourcing; Organizational Structure; Talent and Talent Management; Personal Development and Career

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