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- 2025
- Working Paper
Heterogeneous Beliefs and Stock Market Fluctuations
By: Odhrain McCarthy and Sebastian Hillenbrand
This paper examines the role of heterogeneous investor beliefs in explaining stock market puzzles. Using survey data, we show that individual investors and investment professionals, such as equity analysts and strategists, form distinct beliefs. These groups rely on... View Details
McCarthy, Odhrain, and Sebastian Hillenbrand. "Heterogeneous Beliefs and Stock Market Fluctuations." Working Paper, June 2025. (WFA Brattle Group Ph.D. Award for Outstanding Research.)
- 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; Information Technology Industry; Information Technology Industry; Information Technology Industry; Information Technology Industry; United States
- 2025
- Working Paper
Street Earnings: Implications for Asset Pricing
By: Sebastian Hillenbrand and Odhrain McCarthy
To address the excess volatility puzzle – the excessive movements in stock prices – researchers often study movements in valuation ratios. However, we demonstrate that movements in valuation ratios based on fundamental measures with high transitory volatility, such as... View Details
Hillenbrand, Sebastian, and Odhrain McCarthy. "Street Earnings: Implications for Asset Pricing." Working Paper, June 2025.
- June 2025
- Article
Passive Ownership and Price Informativeness
By: Marco Sammon
I show that passive ownership negatively affects the degree to which stock prices anticipate earnings announcements. Estimates across several research designs imply that the rise in passive ownership over the last 30 years has caused the amount of information... View Details
Keywords: Passive Ownership; ETFs; Market Efficiency; Price; Investment Funds; Stocks; Communication
Sammon, Marco. "Passive Ownership and Price Informativeness." Management Science 71, no. 6 (June 2025): 4582–4598.
- May 2025 (Revised June 2025)
- Background Note
Social Enterprise in Latin America
By: Brian L. Trelstad and Karina Souza
This research note provides an overview of the social enterprise ecosystem in Latin America, exploring current dynamics across key markets, including country-specific insights on Brazil, Mexico, Argentina, Colombia, Chile, and Central America. In a region characterized... View Details
Keywords: Impact Investing; Developing Countries and Economies; Social Entrepreneurship; Emerging Markets; Corporate Social Responsibility and Impact; Mission and Purpose; Ownership; Social Enterprise; Business Strategy; Equality and Inequality; Microfinance; Governing Rules, Regulations, and Reforms; Information Technology Industry; Information Technology Industry; Information Technology Industry; Information Technology Industry; Latin America; Brazil; Mexico; Argentina; Colombia; Chile; Guatemala; Central America; Peru; Uruguay
Trelstad, Brian L., and Karina Souza. "Social Enterprise in Latin America." Harvard Business School Background Note 325-117, May 2025. (Revised June 2025.)
- 2025
- Working Paper
Data-driven Technologies and Local Information Advantages in Small Business Lending
By: Wilbur Chen, Jung Koo Kang and Aditya Mohan
We investigate whether banks' adoption of data-driven technologies influences competitive dynamics in local small business lending by diminishing the information advantages traditionally held by local banks. Using local newspaper closures as an adverse shock to the... View Details
Keywords: Data-driven Technologies; Local Information Advantages; Local Banks; Relationship Lending; Small Business Loans; Small Business; Local Range; Financing and Loans; Banks and Banking; Analytics and Data Science; Banking Industry
Chen, Wilbur, Jung Koo Kang, and Aditya Mohan. "Data-driven Technologies and Local Information Advantages in Small Business Lending." Harvard Business School Working Paper, No. 25-057, May 2025.
- 2024
- Case
EPCorp: Convincing the C-Suite
By: Jacob M. Cook
In EPCorp: Convincing the C-Suite, Shivani Bahl is attempting to sell EPCorp's CEO, Debbie Sullivan, on her ideas for not only a new website upgrade but also a more expansive vision on how data and Generative AI can be used to grow the company. Debbie is understandably... View Details
Cook, Jacob M. "EPCorp: Convincing the C-Suite." Harvard Business Publishing Case, 2024. (Quick Case.)
- April 2025 (Revised April 2025)
- Case
JPMorganChase: Leadership in the Age of GenAI
By: Iavor I. Bojinov, Karim R. Lakhani and David Lane
This case study examines JPMorgan Chase's (JPMC) journey in adopting and implementing Generative AI (GenAI) following the release of ChatGPT. It outlines JPMC's initial cautious approach focused on data security, followed by strategic investments in internal platforms... View Details
Keywords: Banks and Banking; Governance Controls; Information Technology; AI and Machine Learning; Analytics and Data Science; Cybersecurity; Digital Platforms; Digital Transformation; Information Management; Information Infrastructure; Technology Adoption; Job Cuts and Outsourcing; Knowledge Management; Knowledge Sharing; Leading Change; Growth and Development Strategy; Marketing; Product Development; Performance Improvement; Customization and Personalization; Financial Services Industry; United States
Bojinov, Iavor I., Karim R. Lakhani, and David Lane. "JPMorganChase: Leadership in the Age of GenAI." Harvard Business School Case 325-066, April 2025. (Revised April 2025.)
- 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
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
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; Business Model; Technology Industry; United States
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
- 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
Kaps, Christian, and Arielle Anderer. "How to Choose Among Technologies with Learning Curves: Making Better Investment Decisions." 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
- 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
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
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
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)
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; Mobile and Wireless Technology; Technology Industry; Telecommunications Industry; United States
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
Abstract: Featuring Ajit Pai, Former... View Details
Keywords: Investment; Technology Adoption; Technological Innovation; Infrastructure; Mobile and Wireless Technology; Technology Industry; Telecommunications Industry; United States
Wu, Andy, Levi Stroud, and Ruth Page. "5G Networks (B)." Harvard Business School Multimedia/Video Supplement 724-866, December 2024.