Publications
Publications
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- All HBS Web
(21,441)
- Faculty Publications (7,814)
- 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
- June 2025
- Teaching Note
Market Dynamics and Moral Dilemmas: Novo Nordisk's Weight Loss Drugs
Teaching Note for HBS Case No. 324-114. View Details
- June 2025
- Case
VC Exits in Africa: Knife Capital and Quicket
By: Paul A. Gompers, Emanuele Colonnelli, Maagatha Kalavadakken and Namrata Arora
Keet van Zyl and Eben van Heerden, co-founders of Knife Capital, face a critical decision point with their investment in Quicket, a prominent South African ticketing company. As the global ticketing industry recovers, they are exploring strategic exit options to... View Details
Keywords: Financial Services Industry
- June 2025
- Case
AI Wars in 2025
By: Andy Wu and Anna Yang
In June 2025, Google leaders in Mountain View, CA convened after its parent company Alphabet shed a quarter-trillion in market capitalization in a matter of months. The immediate spark—the quiet revelation that Google searches had dipped for the first time in 20... View Details
- June 2025
- Case
Scale AI Scales Up
By: Boris Groysberg and Sarah L. Abbott
Scale AI, the data labeling and AI infrastructure company, had grown rapidly since it was founded in 2016; however, as Scale’s generative AI business was taking off, Alexandr Wang, Scale’s founder and CEO, became concerned that Scale was slowing down. Wang and the... View Details
Keywords: Technology And Innovation Management; Entrepreneur; Managing Growth; Hiring; Generative Ai; Data Labeling; Scale; AI and Machine Learning; Entrepreneurship; Talent and Talent Management; Growth Management; Leadership; Organizational Culture; Business Startups; Selection and Staffing; Technology Industry; United States
- June 2025 (Revised July 2025)
- Case
Full-Funnel Advertising on TikTok
By: Jeremy Yang, Ayelet Israeli and Alexis Lefort
In 2025 TikTok is working to grow its brand and performance advertising business, along with a new integrated full-funnel solution. As an emerging media platform with unique ad formats and user behavior in a privacy-first environment, TikTok faces both significant... View Details
- June 2025
- Supplement
Full-Funnel Advertising on TikTok: An Experiment
By: Jeremy Yang and Ayelet Israeli
TikTok’s Marketing Science team developed a new type of advertising strategy beyond branding and performance advertising, called full-funnel advertising. Branding ads focused on brand building at the top of the funnel by generating consumer awareness, while performance... View Details
- June 2025
- Exercise
Full-Funnel Advertising on TikTok: An Experiment
By: Jeremy Yang and Ayelet Israeli
TikTok’s Marketing Science team developed a new type of advertising strategy beyond branding and performance advertising, called full-funnel advertising. Branding ads focused on brand building at the top of the funnel by generating consumer awareness, while performance... View Details
- June 2025
- Exercise
Full-Funnel Advertising on TikTok: An Experiment (Solution)
By: Jeremy Yang and Ayelet Israeli
TikTok’s Marketing Science team developed a new type of advertising strategy beyond branding and performance advertising, called full-funnel advertising. Branding ads focused on brand building at the top of the funnel by generating consumer awareness, while performance... View Details
- June 2025
- Case
TagHive: Edtech Pricing and Distributor Decisions
By: Isamar Troncoso, Frank V. Cespedes and Stacy Straaberg
Education technology (edtech) company TagHive, founded in 2017, used a direct sales team and third-party distributors to sell its Class Saathi hardware and software solution to 300 clients, mainly primary and secondary schools in India. The product aimed to improve... View Details
Keywords: Business Model; Marketing Channels; Marketing Strategy; Product Marketing; Social Marketing; Information Infrastructure; Internet and the Web; Mobile and Wireless Technology; Technology Adoption; Teaching; Price; Customer Relationship Management; Customer Satisfaction; Growth and Development; Technological Innovation; AI and Machine Learning; Applications and Software; Distribution Channels; Sales; Reputation; Education Industry; Technology Industry; India; South Korea
- June 2025
- Case
Larry Culp at General Electric: Rebuilding an American Icon
By: Nitin Nohria, Kayti Stanley, Ashka Stephen and Drew Goydan
As he takes over as CEO of the iconic industrial giant General Electric, Larry Culp faces a range of urgent issues as the company is delisted from the DJIA and is seen by many as heading towards bankruptcy. Culp steers GE through a series of carefully thought-out moves... View Details
Keywords: Leadership; Restructuring; Financial Management; Organizational Change and Adaptation; Organizational Culture; Performance Improvement; Business and Shareholder Relations; Perception; Corporate Strategy; Value; Health Industry; Aerospace Industry; Industrial Products Industry; Financial Services Industry; North America; Europe
- June 10, 2025
- Article
Research: When Help Isn’t Helpful
By: Colin M. Fisher, Julianna Pillemer and Teresa M. Amabile
Asking for and receiving help at work can boost employees’ creativity, help them learn new skills, and strengthen their interpersonal ties. Yet a years-long study at a global design consultancy found that even in organizations with strong helping cultures, a... View Details
- June 2025
- Case
TfL Pension Fund and the 2022 Gilt Market Crisis
By: Emil N. Siriwardane, Vincent Dessain, Emer Moloney and Carlota Moniz
On September 27, 2022, Padmesh Shukla, CIO of the Transport for London (TfL) Pension Fund, was keeping a careful eye on the turmoil in the U.K. sovereign bond (or gilt) market. When the new government announced the largest tax cuts the U.K. had seen in half a century,... View Details
Keywords: Financial Crisis; Macroeconomics; Assets; Asset Management; Borrowing and Debt; Corporate Finance; Capital Markets; Equity; Financial Liquidity; Financial Instruments; Financial Strategy; Interest Rates; Governing and Advisory Boards; Crisis Management; Resource Allocation; Investment; Financial Services Industry; United Kingdom; England; London; Europe
- 2025
- Working Paper
Fiscal Externalities of Transaction Taxes: Evidence from the Los Angeles Mansion Tax
By: Daniel Green, Vikram Jambulapati, Jack Liebersohn and Tejaswi Velayudhan
We estimate the fiscal externalities of a property transfer tax, the Los Angeles
“Mansion Tax”, on the revenues from property taxes when assessed values are closely
tied to transactions. In California, as in over half of U.S. states, growth in tax as-
sessments... View Details
- May–June 2025
- Article
Algorithmic Assortment Curation: An Empirical Study of Buybox in Online Marketplaces
By: Santiago Gallino, Nil Karacaoglu and Antonio Moreno
Most online sales worldwide take place in marketplaces that connect sellers and buyers. The presence of numerous third-party sellers leads to a proliferation of listings for each product, making it difficult for customers to choose between the available options. Online... View Details
- May–June 2025
- Article
Balancing Digital Safety and Innovation
By: Tomomichi Amano and Tomomi Tanaka
Designers of consumer-facing digital products have tended to focus on novelty and speed (“move fast and break things”). They’ve spent more effort on innovating than on anticipating how customers—and bad actors—might engage with products. But as digital products become... View Details
- June 2025
- Article
Collusion in Brokered Markets
By: John William Hatfield, Scott Duke Kominers and Richard Lowery
High commissions in the U.S. residential real estate agency market present a puzzle for economic theory because brokerage is not a concentrated industry. We model brokered markets as a game in which agents post prices for customers and then choose which other agents to... View Details
Keywords: Real Estate Agents; Real Estate; Realtors; Broker Networks; Brokerage; Brokerage Commissions; ＂Brokerage Industry; Brokered Markets; Brokering; Brokers; Industrial Organization; Repeated Game Framework; ＂Repeated Games＂; Collusion; Antitrust; Microeconomics; Market Design; Theory; Game Theory; Real Estate Industry
- Summer 2025
- Article
Dynamic Competition for Customer Memberships
By: Cristian Chica, Julian Jimenez-Cardenas and Jorge Tamayo
A competitive two-period membership (subscription) market is analyzed. Two symmetric firms charge a “membership” fee that allows consumers to buy products or services at a given unit price for both periods. Firms can choose between long- or short-term memberships. When... View Details
- June 2025
- Article
Integral Outside: The Financial Curb Market, the Electric Telegraph, and the Politics of Pricing in Second Empire France
Financial markets in nineteenth-century France were far more complex than an analysis of the official Bourse or its state-authorized brokers would suggest. Most financial transactions occurred on an illegal yet tacitly tolerated curb market called the coulisse, which... View Details
- 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