Publications - Faculty & Research - Harvard Business School

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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

June 2025
Teaching Note

Market Dynamics and Moral Dilemmas: Novo Nordisk's Weight Loss Drugs

By: Joseph L. Badaracco

Teaching Note for HBS Case No. 324-114. View Details

June 2025
Teaching Note

The Miccosukee Tribe and the Battle to Save the Everglades (B): The Art of Coalition Building

By: Rosabeth Moss Kanter and Jacob A. Small

Teaching Note for HBS Case No. 325-132. Curtis Osceola, Chief of Staff to the Chairman of the Miccosukee Tribe of Indians of Florida, exercised leadership to mobilize allies, deal with opposition, and forge internal and external multi-sector coalitions to help preserve... View Details

Keywords: Communication Strategy; Environmental Sustainability; Leadership; Projects; Alliances; Natural Environment; Power and Influence; Florida; Everglades National Park

June 2025
Case

Progyny (Abridged)

By: Malcolm Baker, Elisabeth Kempf and Philippe van der Beck

June 2025
Case

Transforming a Titan (A)

By: George Serafeim and Lena Duchene

Dimitri Papalexopoulos, fourth-generation CEO of TITAN Cement, must decide whether to keep leading the 120-year-old, family-controlled firm or hand the reins to new management. Over 26 years he has turned TITAN from a domestic player into an internationally diversified... View Details

June 2025
Supplement

Transforming a Titan (B)

By: George Serafeim and Lena Duchene

After a global search the board appoints Marcel Cobuz—ex-LafargeHolcim executive with deep innovation experience—as TITAN’s first non-family CEO. Cobuz co-creates a four-pillar roadmap: sharpen the core cement portfolio, accelerate low-carbon products and aggregates,... View Details

Keywords: AI; Artificial Intelligence; CEO Succession; CEO Role; Family Business

June 2025
Supplement

Transforming a Titan (C)

By: George Serafeim and Lena Duchene

Three years in his tenure as CEO, Cobuz must decide whether to launch a more than €500 million carbon-capture-and-storage facility. The project—Europe’s largest planned CCS installation—would cut almost 20 % of group emissions and unlock a €234 million EU Innovation... View Details

Keywords: CEO; Family

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

2025
Working Paper

Cash Flow Volatility, Return Predictability and Stock Price Decompositions: Why You Should Scale Prices by Trend Cash Flows

By: Sebastian Hillenbrand and Odhrain McCarthy

We address two inconvenient facts in asset pricing: (i) valuation ratios are often more related to future cash flows than to returns, and (ii) they mostly fail to predict returns. We show that these issues arise because stock prices are scaled by cash flows that... View Details

June 2025
Technical Note

Fair Value Accounting for Debt Securities and Loan Assets

By: Jung Koo Kang, Krishna G. Palepu and Charles CY Wang

Keywords: Fair Value Accounting; Debt Securities

June 2025
Case

Roku and The Future of Television, 2025

By: David B. Yoffie, Julie Cruz and Samari Gilbert

June 2025
Supplement

Clay Ridge Capital

By: William R. Kerr and Martin A. Sinozich

June 2025
Teaching Note

Jaipur Literature Festival 2024

By: Tarun Khanna and Samir Junnarkar

June 2025
Supplement

On Video Supplement

By: Ramon Casadesus-Masanell, Karolin Frankenberger and Sascha Mader

June 19, 2025
Article

How to Build a Life: The Strength You Gain by Not Taking Offense

By: Arthur C. Brooks

Register to Read

June 2025
Teaching Note

To Found or to Cofound? That Is the Question

By: Christina Wallace and Stacy Straaberg

Teaching Note for HBS Case No. 824-034. Entrepreneurs often struggle with the question of whether to found solo or alongside one or more cofounders. This case is comprised of three vignettes detailing common founding scenarios: the first-time technical founder; the... View Details

Keywords: Business Startups; Decisions; Partners and Partnerships; Entrepreneurship; Fashion Industry; Financial Services Industry; Technology Industry; United States

June 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

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