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      • 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
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      Toffel, Michael W., and Adam Chen. "Calyx Global: Rating Carbon Credits." Harvard Business School Case 625-102, March 2025.
      • 2025
      • Working Paper

      Private Equity and Workers: Modeling and Measuring Monopsony, Implicit Contracts, and Efficient Reallocation

      By: Kyle Herkenhoff, Josh Lerner, Gordon M. Phillips, Francisca Rebelo and Benjamin Sampson
      We measure the real effects of private equity buyouts on worker outcomes by building a new database that links transactions to matched employer-employee data in the United States. To guide our empirical analysis, we derive testable implications from three theories in... View Details
      Keywords: Monopsony; Market Power; Productivity; Private Equity; Employment; Wages; Employees
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      Herkenhoff, Kyle, Josh Lerner, Gordon M. Phillips, Francisca Rebelo, and Benjamin Sampson. "Private Equity and Workers: Modeling and Measuring Monopsony, Implicit Contracts, and Efficient Reallocation." Harvard Business School Working Paper, No. 25-046, March 2025. (Revised June 2025.)
      • March 2025 (Revised April 2025)
      • Case

      Perplexity: Redefining Search

      By: Suraj Srinivasan, Michelle Hu, Sriraghav Srinivasan and Radhika Kak
      By early 2025, Perplexity had rapidly evolved from a modest startup into a popular "answer engine" valued at $9 billion. The company had boldly positioned itself as the disruptor to Google aiming to redefine search for the AI age. Through novel AI... View Details
      Keywords: AI and Machine Learning; Venture Capital; Innovation Leadership; Technological Innovation; Internet and the Web; Business Startups; Competitive Strategy; Business Model; Technology Industry; United States
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      Srinivasan, Suraj, Michelle Hu, Sriraghav Srinivasan, and Radhika Kak. "Perplexity: Redefining Search." Harvard Business School Case 125-093, March 2025. (Revised April 2025.)
      • March 2025
      • Case

      Stagwell: AI and the Future of Marketing

      By: Suraj Srinivasan and Radhika Kak
      In early 2025, Mark Penn, Founder, CEO and Chairman of Stagwell, a global marketing company with a network of over 70+ agencies that served over 4000 blue-chip customers across 40 countries, was looking at ways that marketers should navigate the disruption emanating... View Details
      Keywords: Advertising; Innovation Strategy; Change Management; AI and Machine Learning; Digital Transformation; Technology Adoption; Marketing Strategy; Service Delivery; Creativity; Business Model; Advertising Industry; Technology Industry
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      Srinivasan, Suraj, and Radhika Kak. "Stagwell: AI and the Future of Marketing." Harvard Business School Case 125-089, March 2025.
      • March 2025
      • Case

      Metaphysic AI: Rethinking the Value of Human Expertise

      By: Zoë B. Cullen, Shikhar Ghosh and Shweta Bagai
      In early 2025, Thomas Graham, CEO of Metaphysic, a leading AI generative video company confronted fundamental questions about who should control digital identity in a world where AI could perfectly recreate human likeness. Founded in 2021, Metaphysic first rose to fame... View Details
      Keywords: Business Model; Ethics; AI and Machine Learning; Intellectual Property; Rights; Negotiation; Value; Motion Pictures and Video Industry; Technology Industry
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      Cullen, Zoë B., Shikhar Ghosh, and Shweta Bagai. "Metaphysic AI: Rethinking the Value of Human Expertise." Harvard Business School Case 825-146, March 2025.
      • 2025
      • Working Paper

      How to Choose Among Technologies with Learning Curves: Making Better Investment Decisions

      By: Christian Kaps and Arielle Anderer
      Learning curves, the fact that technologies improve as a function of cumulative experience or investment, are desirable-think inexpensive solar panels or higher performing semiconductors. But, for firms that need to pick one technology among several candidates, such as... View Details
      Keywords: Learning Curve; Technology; Innovation; Batteries; Energy Storage; Sequential Decision Making; TELCO; Exploration; Exploitation; Problems and Challenges; Cost vs Benefits; Technology Adoption; Battery Industry
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      Kaps, Christian, and Arielle Anderer. "How to Choose Among Technologies with Learning Curves: Making Better Investment Decisions." Working Paper, March 2025.
      • March 2025 (Revised May 2025)
      • Case

      ING Türkiye: Flexible Work in a Competitive Banking Environment

      By: Ashley Whillans and Nico Schaefer
      This case explores ING Türkiye’s journey toward workplace flexibility within the traditionally conservative Turkish banking sector. Beginning with early remote work experiments in 2015 and culminating in the FlexING model, by 2024 ING Türkiye had positioned itself as a... View Details
      Keywords: Talent and Talent Management; Employee Relationship Management; Working Conditions; Business or Company Management; Adaptation; Competition; Organizational Culture; Banking Industry; Turkey
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      Whillans, Ashley, and Nico Schaefer. "ING Türkiye: Flexible Work in a Competitive Banking Environment." Harvard Business School Case 925-027, March 2025. (Revised May 2025.)
      • March 2025
      • Case

      The Changing Climate on Wall Street

      By: Clayton S. Rose, Maxim Pike Harrell and Michael Norris
      Increasing and conflicting regulatory requirements and political pressures regarding climate change tested the leaders of U.S. financial institutions, as they struggled to determine how best to comply while managing their business and its risks.
      In October 2024,... View Details
      Keywords: Competency and Skills; Decision Making; Cost vs Benefits; Ethics; Corporate Accountability; Leadership; Management; Risk Management; Corporate Social Responsibility and Impact; Mission and Purpose; Organizational Change and Adaptation; Organizational Culture; Civil Society or Community; Social Issues; Adaptation; Risk and Uncertainty; Insurance; Climate Change; Change Management; Banking Industry; Financial Services Industry; Insurance Industry; United States; Europe
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      Rose, Clayton S., Maxim Pike Harrell, and Michael Norris. "The Changing Climate on Wall Street." Harvard Business School Case 325-020, March 2025.
      • 2025
      • Working Paper

      Incentive-Compatible Recovery from Manipulated Signals, with Applications to Decentralized Physical Infrastructure

      By: Jason Milionis, Jens Ernstberger, Joseph Bonneau, Scott Duke Kominers and Tim Roughgarden
      We introduce the first formal model capturing the elicitation of unverifiable information from a party (the "source") with implicit signals derived by other players (the "observers"). Our model is motivated in part by applications in decentralized physical... View Details
      Keywords: Mathematical Methods; Infrastructure; Information Infrastructure
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      Milionis, Jason, Jens Ernstberger, Joseph Bonneau, Scott Duke Kominers, and Tim Roughgarden. "Incentive-Compatible Recovery from Manipulated Signals, with Applications to Decentralized Physical Infrastructure." Working Paper, March 2025.
      • March 2025
      • Supplement

      Intuition Robotics: An AI Companion for Older Adults (B)

      By: Amit Goldenberg, Elie Ofek and Orna Dan
      Two years after Intuition Robotics opted to pursue a business-to-government contract with the New York State Office of the Aging, and put direct-to-consumer efforts on the back burner, it was at a crossroads. The partnership had been successful, and the company had... View Details
      Keywords: Business Model; AI and Machine Learning; Resource Allocation; Business and Government Relations; Partners and Partnerships; Business Strategy; Health Industry; Technology Industry; New York (state, US); United States
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      Goldenberg, Amit, Elie Ofek, and Orna Dan. "Intuition Robotics: An AI Companion for Older Adults (B)." Harvard Business School Supplement 925-019, March 2025.
      • February 2025 (Revised April 2025)
      • Case

      Shake Shack's Playbook for the Digital Era

      By: Christopher Stanton, Allison Ciechanover and George Gonzalez
      This case examines Shake Shack’s journey from a single New York City hot dog cart to a global fast-casual restaurant chain renowned for both premium quality and a culture of “enlightened hospitality.” As the company expands worldwide, it pilots digital ordering... View Details
      Keywords: Business Model; Customer Satisfaction; Technology Adoption; Brands and Branding; Organizational Culture; Customization and Personalization; Expansion; Digital Transformation; Food and Beverage Industry
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      Stanton, Christopher, Allison Ciechanover, and George Gonzalez. "Shake Shack's Playbook for the Digital Era." Harvard Business School Case 825-136, February 2025. (Revised April 2025.)
      • February 2025 (Revised August 2025)
      • Case

      Accounting for Bitcoin at Block

      By: Charles C.Y. Wang, Seil Kim and Sa-Pyung Sean Shin
      Abstract: This case explores Block Inc.'s accounting practices for Bitcoin transactions and their impact on financial reporting. Following a 10% stock price drop after missing revenue estimates in Q3 2024, Block faced scrutiny over its Bitcoin-driven revenue model.... View Details
      Keywords: Cryptocurrency; Bitcoin; Fair Value Accounting; Revenue Recognition; Business Model; Fluctuation; Volatility; Revenue; Standards; Valuation
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      Wang, Charles C.Y., Seil Kim, and Sa-Pyung Sean Shin. "Accounting for Bitcoin at Block." Harvard Business School Case 125-072, February 2025. (Revised August 2025.)
      • February 2025
      • Case

      K Health: Scaling an AI Medical Clinic

      By: Iavor I Bojinov, Karim R. Lakhani, Sarah Sasso and Carin-Isabel Knoop
      K Health, an AI-driven healthcare platform, faced the challenge of scaling its operations to reach 10 million annual visits within two years. Founded in 2016 with the vision of leveraging AI and data to improve healthcare accessibility, the company evolved from a... View Details
      Keywords: Business Model; Health Care and Treatment; AI and Machine Learning; Growth and Development Strategy; Competition; Expansion; Technology Industry; Health Industry; United States; Israel
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      Bojinov, Iavor I., Karim R. Lakhani, Sarah Sasso, and Carin-Isabel Knoop. "K Health: Scaling an AI Medical Clinic." Harvard Business School Case 625-091, February 2025.
      • February 21, 2025
      • Article

      How a Company’s Ownership Model Shapes the Mistakes It Makes

      By: Josh Baron
      Why do some companies continue to thrive for decades and others die after an initial run of success? Like many kinds of accidents, company failure is generally the consequence of cascading effects that combine to overwhelm a previously effective strategy. But the... View Details
      Keywords: Business Exit or Shutdown; Failure; Ownership
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      Baron, Josh. "How a Company’s Ownership Model Shapes the Mistakes It Makes." Harvard Business Review Digital Articles (February 21, 2025).
      • February 2025
      • Case

      K Health: Building an AI Physician Model

      By: Iavor I. Bojinov, Karim R. Lakhani, Sarah Sasso and Carin-Isabel Knoop
      Allon Bloch, CEO and cofounder of K Health, encountered a number of challenges and opportunities to navigate as the company prepared to launch its AI-driven healthcare platform in the U.S. in 2018. The case examines the potential of artificial intelligence to improve... View Details
      Keywords: Health Care and Treatment; AI and Machine Learning; Product Launch; Business Strategy; Technology Industry; Health Industry; United States
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      Bojinov, Iavor I., Karim R. Lakhani, Sarah Sasso, and Carin-Isabel Knoop. "K Health: Building an AI Physician Model." Harvard Business School Case 625-079, February 2025.
      • February 2025
      • Tutorial

      Preparing Business Leaders for an Era of Climate Instability: Understanding and Managing Physical Climate Risk

      By: Michael W. Toffel and Spencer Glendon
      In this compelling video, Spencer Glendon, founder of Probable Futures and Executive Fellow at Harvard Business School, describes the profound implications of climate change for businesses, the economy, and societies around the world. Drawing from his background in... View Details
      Keywords: Modeling; Climate Change; Adaptation; Risk and Uncertainty; Risk Management; Forecasting and Prediction
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      Toffel, Michael W., and Spencer Glendon. Preparing Business Leaders for an Era of Climate Instability: Understanding and Managing Physical Climate Risk. Harvard Business School Tutorial 625-709, February 2025. (Click here for HBP Educators link. Click here for HBR link.)
      • 2025
      • Working Paper

      Is Love Blind? AI-Powered Trading with Emotional Dividends

      By: De-Rong Kong and Daniel Rabetti
      We leverage the non-fungible tokens (NFTs) setting to assess the valuation of emotional dividends (LOVE), a long-standing empirical challenge in private-value markets such as art, antiques, and collectibles. Having created and validated our proxy, we use deep learning... View Details
      Keywords: NFTs; Non-fungible Tokens; AI and Machine Learning; Valuation; Financial Markets
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      Kong, De-Rong, and Daniel Rabetti. "Is Love Blind? AI-Powered Trading with Emotional Dividends." Working Paper, February 2025.
      • 2025
      • Working Paper

      Tax Planning, Illiquidity, and Credit Risks: Evidence from DeFi Lending

      By: Lisa De Simone, Peiyi Jin and Daniel Rabetti
      This study establishes a plausible causal link between tax-planning-induced illiquidity and credit risks in lending markets. Exploiting an exogenous tax shock imposed by the Internal Revenue Service (IRS) on cryptocurrency gains, along with millions of transactions in... View Details
      Keywords: Cryptocurrency; Taxation; Financial Liquidity; Credit; Financing and Loans; Financial Markets
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      De Simone, Lisa, Peiyi Jin, and Daniel Rabetti. "Tax Planning, Illiquidity, and Credit Risks: Evidence from DeFi Lending." Working Paper, February 2025.
      • February 2025
      • Supplement

      eBee: Affordable Mobility for Africa

      By: Ramon Casadesus-Masanell, Gamze Yucaoglu and Jordan Mitchell
      The case opens in March 2023, as Sten van der Ham and Jaap Maljers, CEO and co-founder of eBee, an electric bike (e-bike) company in Africa, are contemplating the different avenues for growth and path to profitability for the young and ambitious company. In 2023, the... View Details
      Keywords: Business Model; Value Creation; Competition; Logistics; Profit; Resource Allocation; Expansion; Business Strategy; Growth and Development Strategy; Distribution Channels; Entrepreneurial Finance; Bicycle Industry; Africa; Kenya
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      Casadesus-Masanell, Ramon, Gamze Yucaoglu, and Jordan Mitchell. "eBee: Affordable Mobility for Africa." Harvard Business School Spreadsheet Supplement 725-855, February 2025.
      • 2025
      • Working Paper

      Dynamic Personalization with Multiple Customer Signals: Multi-Response State Representation in Reinforcement Learning

      By: Liangzong Ma, Ta-Wei Huang, Eva Ascarza and Ayelet Israeli
      Reinforcement learning (RL) offers potential for optimizing sequences of customer interactions by modeling the relationships between customer states, company actions, and long-term value. However, its practical implementation often faces significant challenges.... View Details
      Keywords: Dynamic Policy; Deep Reinforcement Learning; Representation Learning; Dynamic Difficulty Adjustment; Latent Variable Models; Customer Relationship Management; Customer Value and Value Chain; Foreign Direct Investment; Analytics and Data Science
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      Ma, Liangzong, Ta-Wei Huang, Eva Ascarza, and Ayelet Israeli. "Dynamic Personalization with Multiple Customer Signals: Multi-Response State Representation in Reinforcement Learning." Harvard Business School Working Paper, No. 25-037, February 2025.
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