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    • All HBS Web  (3,093)
      • Faculty Publications  (492)

      Informal InvestmentRemove Informal Investment →

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      • April 2025
      • Case

      Breezm: Innovative 3D-Printed Eyewear (A)

      By: Juan Alcácer, Brian Mao Fu and Adina Wong
      In 2023, Breezm, a South Korean startup, faced a strategic decision about how to grow its innovative 3D-printed, custom-fit eyewear business. Co-founded in 2017 by Zenma Park and Wooseok Sung, Breezm combined facial scanning, AI, and in-house production to solve the... View Details
      Keywords: 3D Printing; Eyeyewear; Growth; Business Startups; AI and Machine Learning; Technological Innovation; Growth and Development Strategy; Risk and Uncertainty; Expansion; South Korea
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      Alcácer, Juan, Brian Mao Fu, and Adina Wong. "Breezm: Innovative 3D-Printed Eyewear (A)." Harvard Business School Case 725-376, April 2025.
      • 2025
      • Working Paper

      With a Little Help from My Family: Informal Startup Financing

      By: Brian K. Baik, Johan Ludvig S. Karlsen and Katja Kisseleva
      Using Norwegian administrative data, we identify family equity investments in startups and examine their effects on investor returns and firm behavior. Informal investors earn lower returns than external individuals, and the firms they back are less likely to secure... View Details
      Keywords: Early Stage Finance; Informal Investment; Household Finance; Risk Taking; Entrepreneurial Finance; Entrepreneurship; Personal Finance; Family and Family Relationships; Business Startups; Investment; Norway
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      Baik, Brian K., Johan Ludvig S. Karlsen, and Katja Kisseleva. "With a Little Help from My Family: Informal Startup Financing." Harvard Business School Working Paper, No. 25-053, April 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; 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.)
      • 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.
      • 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.
      • January 2025
      • Case

      Untapped Global: Financing Africa's Missing Middle

      By: Raymond Kluender and Emanuele Colonnelli
      In November 2024, Jim Chu, founder and CEO of Untapped Global, faced mounting internal tensions over the company’s strategic direction. Untapped had developed a data-driven revenue-based financing (RBF) model to address the “missing middle” problem—the $5.2 trillion... View Details
      Keywords: Social Entrepreneurship; Venture Capital; Working Capital; Private Equity; Financial Strategy; Microfinance; International Finance; Currency Exchange Rate; Profit Sharing; Revenue; Developing Countries and Economies; Economic Growth; Emerging Markets; Mission and Purpose; Small Business; Entrepreneurial Finance; Information Technology Industry; Information Technology Industry; Information Technology Industry; Information Technology Industry; Africa; Nigeria; South Africa; Kenya; Uganda; California; San Francisco
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      Kluender, Raymond, and Emanuele Colonnelli. "Untapped Global: Financing Africa's Missing Middle." Harvard Business School Case 825-056, January 2025.
      • January 2025
      • Case

      AI Meets VC: The Data-Driven Revolution at Quantum Light Capital

      By: Lauren Cohen, Grace Headinger and Sophia Pan
      Ilya Kondrashov, CEO of Quantum Light Capital, was driven to harness AI for identifying high-potential scale-ups. Collaborating with Nik Storonsky, founder of Revolut, the duo observed that most venture capital (VC) decisions were heavily influenced by emotion, with... View Details
      Keywords: Artificial Intelligence; Business Finance; Data Analysis; Angel Investors; Cognitive Biases; Scale; Venture Capital; Investment; Business Model; Forecasting and Prediction; Technological Innovation; Innovation Strategy; Behavior; Cognition and Thinking; Public Opinion; Private Sector; Business Strategy; Competitive Advantage; Business Earnings; Behavioral Finance; AI and Machine Learning; Analytics and Data Science; Business Startups; Financial Services Industry; London; United Kingdom
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      Cohen, Lauren, Grace Headinger, and Sophia Pan. "AI Meets VC: The Data-Driven Revolution at Quantum Light Capital." Harvard Business School Case 225-053, January 2025.
      • January 2025
      • Case

      Apax Partners: Deciding Whether to Bid for Trader Corp.

      By: Benjamin C. Esty and Edward A. Meyer
      Apax Partners’ investment committee was schedule to meet on March 21, 2011, to decide whether to invest in Trader Corporation, a Canadian classified advertising business for used automobiles with both print (magazines) and digital (website) distribution. What made this... View Details
      Keywords: Value Creation; Network Effects; Private Equity; Growth Management; Digital Marketing; Business Strategy; Competitive Advantage; E-commerce; Valuation; Competition; Digital Platforms; Digital Strategy; Digital Transformation; Transition; Investment; Risk and Uncertainty; Information Industry; Information Industry; Information Industry; Canada; United Kingdom; New York (state, US); New York (city, NY)
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      Esty, Benjamin C., and Edward A. Meyer. "Apax Partners: Deciding Whether to Bid for Trader Corp." Harvard Business School Case 225-032, January 2025.
      • December 2024
      • Case

      5G Networks

      By: Andy Wu, Levi Stroud and Ruth Page
      This case, featuring Ajit Pai, Former Chairman of the U.S. Federal Communications Commission, explores the potential of 5G wireless networks. It illustrates how 5G works by examining its infrastructure and technological advancements. The case considers the specific... View Details
      Keywords: Investment; Technology Adoption; Technological Innovation; Infrastructure; Technology Industry; Telecommunications Industry; United States
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      Wu, Andy, Levi Stroud, and Ruth Page. "5G Networks." Harvard Business School Multimedia/Video Case 724-865, December 2024.
      • December 2024
      • Supplement

      5G Networks (B)

      By: Andy Wu, Levi Stroud and Ruth Page
      Pre-Abstract: This multimedia case should be assigned to students in advance of class. Instructors should consider the timing of making the B and C video available to students, as they may reveal key case details.

      Abstract: Featuring Ajit Pai, Former... View Details
      Keywords: Investment; Technology Adoption; Technological Innovation; Infrastructure; Technology Industry; Telecommunications Industry; United States
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      Wu, Andy, Levi Stroud, and Ruth Page. "5G Networks (B)." Harvard Business School Multimedia/Video Supplement 724-866, December 2024.
      • December 2024
      • Article

      Coordinating the Energy Transition: Electrifying Transportation in California and Germany

      By: Nicholas Goedeking and Jonas Meckling
      California and Germany share ambitious emission reduction targets. Yet California is ahead of Germany in electrifying transportation by several metrics, including the number of public charging stations. We show that variation in the politics of coordination in... View Details
      Keywords: Electric Vehicles; Coordination; Technology Adoption; Infrastructure; Transportation; Government and Politics; Energy; Utilities Industry; Germany; California
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      Goedeking, Nicholas, and Jonas Meckling. "Coordinating the Energy Transition: Electrifying Transportation in California and Germany." Art. 114321. Energy Policy 195 (December 2024).
      • November 2024
      • Case

      Polish Agro: Where Do We Grow from Here?

      By: Willy C. Shih, Lena Duchene and Daniela Beyersdorfer
      By July 2024, Polish Agro had grown into one of Poland’s fastest-growing agribusinesses, with €230 million in revenue, 82 employees, and operations across Northern Poland. The company supported farmers with essential agricultural inputs like fertilizers and seeds,... View Details
      Keywords: Plant-Based Agribusiness; Distribution; Volatility; Customer Focus and Relationships; Customer Value and Value Chain; Climate Change; Environmental Regulation; Profit; Trade; Digital Strategy; Innovation Strategy; Crisis Management; Growth and Development Strategy; Resource Allocation; Advertising; Brands and Branding; E-commerce; Business and Community Relations; Networks; Adaptation; Adoption; Competitive Advantage; Business Model; Health Pandemics; War; Agriculture and Agribusiness Industry; Europe; Poland
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      Shih, Willy C., Lena Duchene, and Daniela Beyersdorfer. "Polish Agro: Where Do We Grow from Here?" Harvard Business School Case 625-061, November 2024.
      • November 2024
      • Teaching Note

      Mercado Bitcoin: M&A, IPO, or Series B?

      By: Raymond Kluender, Emanuele Colonnelli and Sabrina Howell
      Teaching Note for HBS Case No. 825-047. In April 2021, Brazilian cryptocurrency platform Mercado Bitcoin, had to decide how to scale: go public, M&A with a bank, or take a VC big check. In a highly volatile market, Roberto Dagnoni, chairman of the board, viewed the... View Details
      Keywords: Cryptocurrency; Mergers and Acquisitions; Business Growth and Maturation; Business Startups; Decision Making; Going Public; Ownership Stake; Strategic Planning; Venture Capital; Problems and Challenges; Business Cycles; Digital Platforms; Emerging Markets; Market Timing; Expansion; Diversification; Valuation; Value Creation; Investment Funds; Initial Public Offering; Price; Price Bubble; Negotiation Offer; Information Technology Industry; Information Technology Industry; Brazil; Latin America
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      Kluender, Raymond, Emanuele Colonnelli, and Sabrina Howell. "Mercado Bitcoin: M&A, IPO, or Series B?" Harvard Business School Teaching Note 825-092, November 2024.
      • 2024
      • Working Paper

      Climate Solutions, Transition Risk, and Stock Returns

      By: Shirley Lu, Edward J. Riedl, Simon Xu and George Serafeim
      Using large language models to measure firms' climate solution products and services, we find that high-climate solution firms exhibit lower stock returns and higher market valuation multiples. Their stock prices respond positively to events signaling increased demand... View Details
      Keywords: Technology; Generative Ai; Large Language Models; Climate Finance; Climate Change; Innovation and Invention; Environmental Sustainability; AI and Machine Learning; Investment; Financial Markets
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      Lu, Shirley, Edward J. Riedl, Simon Xu, and George Serafeim. "Climate Solutions, Transition Risk, and Stock Returns." Harvard Business School Working Paper, No. 25-024, November 2024.
      • 2024
      • Working Paper

      Hidden Risk

      By: Daniel Barth, Phillip Monin, Emil Siriwardane and Adi Sunderam
      Since 2013, large U.S. hedge fund advisers have been required to report risk exposures in their regulatory filings. Using these data, we first establish that managers’ perceptions of risk contain useful information that is not embedded in fund returns. Investor flows... View Details
      Keywords: Corporate Disclosure; Investment Funds; Risk and Uncertainty; Investment Return; Communication Strategy; Financial Services Industry
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      Barth, Daniel, Phillip Monin, Emil Siriwardane, and Adi Sunderam. "Hidden Risk." Working Paper, November 2024.
      • October 2024
      • Case

      Parexel: Scaling Up and Industry Dynamics

      By: Regina E. Herzlinger and Ben Creo
      Through the lens of biopharmaceutical contract research organization (CRO) PAREXEL, this case traces the evolution of the firm as it reinvents itself in response to the transformation of the CRO sector from a small, secondary cluster of firms into a major player with... View Details
      Keywords: Research; Innovation and Invention; Business Model; Transformation; Globalization; Information Technology; Competitive Advantage; Pharmaceutical Industry
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      Herzlinger, Regina E., and Ben Creo. "Parexel: Scaling Up and Industry Dynamics." Harvard Business School Case 325-046, October 2024.
      • 2024
      • Working Paper

      Does Private Equity Have Any Business Being in the Health Care Business?

      By: Nori Gerardo Lietz and Zirui Song
      Private Equity (“PE”) has come under increased scrutiny by the press, academics, and policymakers, as well as the public, for its investments in health care delivery. This scrutiny has been exacerbated by recent high profile hospital bankruptcies following PE... View Details
      Keywords: Private Equity; Government Administration; Acquisition; Health Industry
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      Lietz, Nori Gerardo, and Zirui Song. "Does Private Equity Have Any Business Being in the Health Care Business?" Harvard Business School Working Paper, No. 25-012, September 2024.
      • August 2024 (Revised November 2024)
      • Case

      Mercado Bitcoin: M&A, IPO, or Series B?

      By: Raymond Kluender, Emanuele Colonnelli, Sabrina T. Howell and Karina Souza
      In April 2021, Brazilian cryptocurrency platform Mercado Bitcoin had to decide how to scale: go public, M&A with a bank, or take a VC big check. In a highly volatile market, Roberto Dagnoni, chairman of the board, viewed the unprecedent crypto momentum as a window of... View Details
      Keywords: Cryptocurrency; Mergers and Acquisitions; Business Growth and Maturation; Business Startups; Decision Making; Going Public; Ownership Stake; Strategic Planning; Venture Capital; Problems and Challenges; Business Cycles; Digital Platforms; Emerging Markets; Market Timing; Expansion; Diversification; Valuation; Value Creation; Investment Funds; Initial Public Offering; Price; Price Bubble; Negotiation Offer; Financial Liquidity; Information Technology Industry; Information Technology Industry; Latin America; South America; Brazil; Sao Paulo; United States
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      Kluender, Raymond, Emanuele Colonnelli, Sabrina T. Howell, and Karina Souza. "Mercado Bitcoin: M&A, IPO, or Series B?" Harvard Business School Case 825-047, August 2024. (Revised November 2024.)
      • July 2024
      • Case

      Jacqueline Cook at Vendasta: Debating an IPO

      By: Reza Satchu, Tom Quinn and Andrew Kosc
      In May 2021, after a surge in demand for digital services that prompted high valuations for startups across the Canadian tech sector, Saskatchewan-based Vendasta entered the final stages of the initial public offering (IPO) process. COO Jacqueline Cook had invested her... View Details
      Keywords: Business Growth and Maturation; Business Startups; Interpersonal Communication; Cost vs Benefits; Forecasting and Prediction; Business Cycles; Entrepreneurship; Fairness; Capital Markets; Private Equity; Investment Banking; Stock Options; Financial Markets; Initial Public Offering; Institutional Investing; Price Bubble; Digital Platforms; Digital Transformation; Internet and the Web; Leadership; Growth and Development Strategy; Managerial Roles; Agreements and Arrangements; Going Public; Ownership Stake; Performance Expectations; Work-Life Balance; Strategic Planning; Business and Stakeholder Relations; Rank and Position; Risk and Uncertainty; Opportunities; Happiness; Reputation; Status and Position; Well-being; Information Technology Industry; Information Technology Industry; Canada
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      Satchu, Reza, Tom Quinn, and Andrew Kosc. "Jacqueline Cook at Vendasta: Debating an IPO." Harvard Business School Case 825-037, July 2024.
      • July 2024
      • Article

      AI, ROI, and Sales Productivity

      By: Frank V. Cespedes
      Artificial intelligence (AI) is now a loose term for many different things and at the peak of its hype curve. So managers hitch-their-pitch to the term in arguing for resources. But like any technology, its business value depends upon actionable use cases embraced by... View Details
      Keywords: ROI; AI and Machine Learning; Sales; Investment Return
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      Cespedes, Frank V. "AI, ROI, and Sales Productivity." Top Sales Magazine (July 2024), 12–13.
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