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    • All HBS Web  (1,227)
      • Faculty Publications  (163)

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      • 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
      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; Business Startups; Initial Public Offering; Knowledge Sharing; Competitive Advantage; Apparel and Accessories Industry; Apparel and Accessories Industry; United States; California
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      Toffel, Michael W., Ken Pucker, and Stacy Straaberg. "Allbirds: Decarbonizing Fashion (A) and (B)." Harvard Business School Teaching Note 625-006, April 2025.
      • 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; Apparel and Accessories Industry; United States; California
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      Toffel, Michael W., Ken Pucker, and Stacy Straaberg. "Allbirds: Decarbonizing Fashion PowerPoint Supplement." Harvard Business School PowerPoint Supplement 625-005.
      • 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.)
      • January 2025 (Revised April 2025)
      • Case

      Duolingo: On a 'Streak'

      By: Jeffrey F. Rayport, Nicole Tempest Keller and Nicole Luo
      In December 2024, Severin Hacker, Co-Founder and Chief Technology Officer of Duolingo, reflected on the remarkable evolution of the language-learning app he helped launch in 2011. As the #1 most downloaded education app in the world, Duolingo had over 100 million... View Details
      Keywords: Learning; AI and Machine Learning; Growth and Development Strategy; Motivation and Incentives; Diversification; Business Model; Market Entry and Exit; Technology Industry; Education Industry; United States
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      Rayport, Jeffrey F., Nicole Tempest Keller, and Nicole Luo. "Duolingo: On a 'Streak'." Harvard Business School Case 825-097, January 2025. (Revised April 2025.)
      • January 2025
      • Case

      The Vision of Wonder

      By: Michael S. Kaufman and Daniella Bertolotti
      Serial entrepreneur Marc Lore successfully disrupted three marketplaces—trading cards, diapers (founded Diapers.com and eventually sold to Amazon for more than $500 million) and ecommerce (founded Jet.com competing directly with Amazon and eventually sold to Walmart... View Details
      Keywords: Mergers and Acquisitions; Business Exit or Shutdown; Entrepreneurship; Disruptive Innovation; Growth and Development Strategy; Food and Beverage Industry; Food and Beverage Industry
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      Kaufman, Michael S., and Daniella Bertolotti. "The Vision of Wonder." Harvard Business School Case 325-078, January 2025.
      • January–February 2025
      • Article

      Want Your Company to Get Better at Experimentation?: Learn Fast by Democratizing Testing

      By: Iavor Bojinov, David Holtz, Ramesh Johari, Sven Schmit and Martin Tingley
      For years, online experimentation has fueled the innovations of leading tech companies, enabling them to rapidly test and refine new ideas, optimize product features, personalize user experiences, and maintain a competitive edge. The widespread availability and lower... View Details
      Keywords: Technological Innovation; AI and Machine Learning; Analytics and Data Science; Product Development; Competitive Advantage
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      Bojinov, Iavor, David Holtz, Ramesh Johari, Sven Schmit, and Martin Tingley. "Want Your Company to Get Better at Experimentation? Learn Fast by Democratizing Testing." Harvard Business Review 103, no. 1 (January–February 2025): 96–103.
      • November 2024
      • Supplement

      AlphaGo (C): Birth of a New Intelligence

      By: Shikhar Ghosh and Shweta Bagai
      This case, the final of a three-part series, explores DeepMind's pivotal transition from mastering games to solving real-world scientific challenges. In December 2020, DeepMind's AI system AlphaFold 2 achieved a breakthrough by solving protein folding—a 50-year-old... View Details
      Keywords: Autonomy; Deep Learning; Drug Discovery; Healthcare Innovation; Neural Networks; Scientific Research; Technology Startup; AI and Machine Learning; Technological Innovation; Research and Development; Business Model; Business Strategy; Open Source Distribution; Technology Industry; United States
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      Ghosh, Shikhar, and Shweta Bagai. "AlphaGo (C): Birth of a New Intelligence." Harvard Business School Supplement 825-075, November 2024.
      • 2024
      • Working Paper

      Igniting Innovation: Evidence from PyTorch on Technology Control in Open Collaboration

      By: Daniel Yue and Frank Nagle
      Many companies offer free access to their technology to encourage outside addon innovation, hoping to later profit by raising prices or harnessing the power of the crowd while continuing to steer the direction of innovation. They can achieve this balance by opening... View Details
      Keywords: Technological Innovation; Power and Influence; Collaborative Innovation and Invention; Corporate Governance
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      Yue, Daniel, and Frank Nagle. "Igniting Innovation: Evidence from PyTorch on Technology Control in Open Collaboration." Harvard Business School Working Paper, No. 25-013, September 2024.
      • August 2024
      • Case

      Cristina Ventura: The Career of a Catalyst

      By: Linda A. Hill, Allison J. Wigen and Ruth Page
      This multimedia case follows the career of Chief Catalyst Officer for the Lane Crawford Joyce Group (LCJG), Cristina Ventura. After beginning her career in luxury in Europe and Asia, Ventura was recruited in 2011 to open Apple’s flagship stores in Hong Kong and South... View Details
      Keywords: Innovation Leadership; Innovation Strategy; Technological Innovation; Leadership Style; Leading Change; Entrepreneurship; Luxury; Family Business; Personal Development and Career; Fashion Industry; Retail Industry; Technology Industry; Asia; China; Hong Kong
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      Hill, Linda A., Allison J. Wigen, and Ruth Page. "Cristina Ventura: The Career of a Catalyst." Harvard Business School Multimedia/Video Case 425-708, August 2024.
      • May 2024
      • Teaching Note

      AI Wars

      By: Andy Wu and Matt Higgins
      Teaching Note for HBS Case No. 723-434. In 2024, the world was looking to Google to see what the search giant and long-time putative technical leader in artificial intelligence (AI) would do to compete in the massively hyped technology of generative AI popularized over... View Details
      Keywords: AI; Trends; AI and Machine Learning; Public Opinion; Technological Innovation; Competitive Advantage; Technology Industry
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      Wu, Andy, and Matt Higgins. "AI Wars." Harvard Business School Teaching Note 724-482, May 2024.
      • May 2024
      • Teaching Note

      AI21 Labs in 2023: Strategy for Generative AI

      By: David Yoffie
      Teaching Note for HBS Case 724-383. The case has 3 important teaching purposes: First, what are the advantages and disadvantages of imitation? (e.g., Should AI21 imitate OpenAI with a chatbot?) Second, what are the advantages and disadvantages of keeping new technology... View Details
      Keywords: AI; Generative Ai; Generative Models; AI and Machine Learning; Innovation Strategy; Growth and Development Strategy; Business Model; Business Startups; Open Source Distribution; Competitive Advantage; Technology Industry; Israel
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      Yoffie, David. "AI21 Labs in 2023: Strategy for Generative AI." Harvard Business School Teaching Note 724-461, May 2024.
      • March 2024 (Revised June 2025)
      • Teaching Note

      CoPilot(s): Generative AI at Microsoft and GitHub

      By: Frank Nagle and Maria P. Roche
      This teaching note is the companion to case N9-624-010 CoPilot(s): Generative AI at Microsoft and GitHub, which takes place in late 2021. The case briefly describes the history of both GitHub and Microsoft with a particular focus on open source software (OSS)—software... View Details
      Keywords: Mergers and Acquisitions; AI and Machine Learning; Applications and Software; Technological Innovation; Product Launch; Open Source Distribution; Product Development; Commercialization; Competition; Resource Allocation; Technology Industry
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      Nagle, Frank, and Maria P. Roche. "CoPilot(s): Generative AI at Microsoft and GitHub." Harvard Business School Teaching Note 724-452, March 2024. (Revised June 2025.)
      • March 2024 (Revised May 2025)
      • Case

      Governing OpenAI (A)

      By: Lynn S. Paine, Suraj Srinivasan and Will Hurwitz
      In late November 2023, OpenAI’s new board of directors took stock of the situation. The company, which sought to develop artificial general intelligence (AGI)—computer systems with capabilities exceeding human abilities—was looking to regain its footing after a chaotic... View Details
      Keywords: Artificial Intelligence; Board Of Directors; Board Decisions; Board Dynamics; Corporate Boards; Governance Changes; Governance Structure; Leadership Change; Legal Aspects Of Business; Nonprofit Governance; Strategy And Execution; Technological Change; AI and Machine Learning; Corporate Governance; Leadership; Management; Mission and Purpose; Technological Innovation; Governing Rules, Regulations, and Reforms; Governing and Advisory Boards; Resignation and Termination; Ethics; Nonprofit Organizations; Open Source Distribution; Partners and Partnerships; Technology Industry; San Francisco; United States
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      Paine, Lynn S., Suraj Srinivasan, and Will Hurwitz. "Governing OpenAI (A)." Harvard Business School Case 324-103, March 2024. (Revised May 2025.)
      • February 2024
      • Module Note

      Collaborate on the Core, Compete on the Edges

      By: Frank Nagle
      In the rapidly evolving environment of modern business, the digitization of economic activity and the ubiquitous integration of technology across industries are fundamentally altering how companies develop and implement strategy. The rise of digital technologies has... View Details
      Keywords: Technology Adoption; Competition; Cooperation; Collaborative Innovation and Invention
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      Nagle, Frank. "Collaborate on the Core, Compete on the Edges." Harvard Business School Module Note 724-453, February 2024.
      • February 2024
      • Case

      Horizon Quantum Computing

      By: Paul A. Gompers and Billy Chan
      In 2023, the Singapore-based startup company Horizon Quantum Computing was on the cusp of fast expansion and the founder faced the challenge to decide where to open the second office outside Singapore. To make a choice from the list of 10 countries, the founder had to... View Details
      Keywords: Business Plan; Entrepreneurship; Entrepreneurial Finance; Disruptive Innovation; Business Offices; Business Startups; Talent and Talent Management; Decision Choices and Conditions; Partners and Partnerships; Expansion; Information Technology Industry; Telecommunications Industry; Singapore; Asia
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      Gompers, Paul A., and Billy Chan. "Horizon Quantum Computing." Harvard Business School Case 224-049, February 2024.
      • February 2024 (Revised January 2025)
      • Case

      AGENTS.inc: Pathways to Growth at an AI Startup

      By: Frank Nagle, Manuel Hoffmann, Karoline Ströhlein and Susan Pinckney
      The case describes the history of AGENTS.inc. Despite being a small startup, with only four employees, that had never had a funding round, the company boasted an impressive client portfolio including multiple Fortune 500 companies. While AGENTS.inc had been an early... View Details
      Keywords: Business Growth and Maturation; Business Model; Business Startups; Small Business; Transformation; Customer Focus and Relationships; Decisions; Entrepreneurship; Venture Capital; Financial Strategy; AI and Machine Learning; Digital Platforms; Technological Innovation; Copyright; Management; Growth and Development; Market Timing; Ownership; Risk and Uncertainty; Competition; Open Source Distribution; Entrepreneurial Finance; Computer Industry; Europe; Germany
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      Nagle, Frank, Manuel Hoffmann, Karoline Ströhlein, and Susan Pinckney. "AGENTS.inc: Pathways to Growth at an AI Startup." Harvard Business School Case 724-444, February 2024. (Revised January 2025.)
      • February 2024 (Revised April 2024)
      • Case

      Uniswap: Fighting a Vampire Attack (A)

      By: Shikhar Ghosh, Shweta Bagai and Liang Wu
      This is the first of a three-case series that explores the challenges faced by Uniswap, a key player in the decentralized finance (DeFi) sector. Founded by Hayden Adams, the case traces Uniswap's rapid growth from a simple idea inspired by a Reddit post to becoming one... View Details
      Keywords: Blockchain; Cryptocurrency; Crypto Economy; Community; Decentralization; Decentralized Exchange; Decentralized Finance; Open Platforms; Open-source Innovation; Market Distruption; Stablecoin; Vampire Attack; Web3; Token; Digital Platforms; Entrepreneurship; Governance; Technological Innovation; Competitive Strategy; Financial Liquidity; Financial Services Industry; Technology Industry; United States
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      Ghosh, Shikhar, Shweta Bagai, and Liang Wu. "Uniswap: Fighting a Vampire Attack (A)." Harvard Business School Case 824-162, February 2024. (Revised April 2024.)
      • January 2024
      • Case

      Sprouts Farmers Market

      By: Rajiv Lal, Forest L. Reinhardt and Natalie Kindred
      Sprouts Farmers Markets (Sprouts) is a Phoenix, Arizona-based chain of 400-plus natural foods stores in 23 U.S. states and $6.4 billion in sales as of 2022. In its product assortment, brand image, and store environment, Sprouts emphasizes freshness, health, innovation,... View Details
      Keywords: Business Model; Growth and Development Strategy; Brands and Branding; Strategic Planning; Sales; Business Strategy; Expansion; Product Positioning; Marketing Strategy; Competition; Retail Industry; United States; Arizona
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      Lal, Rajiv, Forest L. Reinhardt, and Natalie Kindred. "Sprouts Farmers Market." Harvard Business School Case 524-059, January 2024.
      • 2024
      • Book

      The Everything Token: How NFTs and Web3 Will Transform the Way We Buy, Sell, and Create

      By: Steve Kaczynski and Scott Duke Kominers
      We demystify the coming digital revolution, showing how NFTs will transform our online and offline interactions.

      NFTs aren’t just pictures on the internet, or a fad that has come and gone. Rather, they’re a new technology for creating digital assets and... View Details
      Keywords: Economic Systems; Microeconomics; Entrepreneurship; Cultural Entrepreneurship; Information Technology; Innovation and Invention; Innovation Strategy; Digital Platforms; Digital Strategy; Digital Transformation; Internet and the Web; Technology Adoption; Marketing; Marketing Strategy; Product Marketing; Product Positioning; Markets; E-commerce; Market Design; Value; Customer Value and Value Chain; Collaborative Innovation and Invention; Innovation and Management; Organizational Structure; Customer Ownership; Ownership; Media and Broadcasting Industry; Media and Broadcasting Industry; Media and Broadcasting Industry; Media and Broadcasting Industry; Media and Broadcasting Industry; Media and Broadcasting Industry; Media and Broadcasting Industry; Media and Broadcasting Industry; Media and Broadcasting Industry
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      Kaczynski, Steve, and Scott Duke Kominers. The Everything Token: How NFTs and Web3 Will Transform the Way We Buy, Sell, and Create. Portfolio/Penguin, 2024.
      • November 2023
      • Case

      Open Source Machine Learning at Google

      By: Shane Greenstein, Martin Wattenberg, Fernanda B. Viégas, Daniel Yue and James Barnett
      Set in early 2023, the case exposes students to the challenges of managing open source software at Google. The case focuses on the challenges for Alex Spinelli, Vice President of Product Management for Core Machine Learning. He must set priorities for Google’s efforts... View Details
      Keywords: Decision Choices and Conditions; Technological Innovation; Open Source Distribution; Strategy; AI and Machine Learning; Applications and Software; Technology Industry; United States
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      Greenstein, Shane, Martin Wattenberg, Fernanda B. Viégas, Daniel Yue, and James Barnett. "Open Source Machine Learning at Google." Harvard Business School Case 624-015, November 2023.
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