Publications
Publications
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- All HBS Web
(11,046)
- Faculty Publications (3,110)
- April 2025
- Article
The Disappearing Index Effect
By: Robin Greenwood and Marco Sammon
The abnormal return associated with a stock being added to the S&P 500 has fallen from an average
of 7.4% in the 1990s to 0.3% over the past decade. This has occurred despite a significant increase in the
share of stock market assets linked to the index. A similar... View Details
- 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
- March 2025
- Case
Boom, Bust, or Bullseye? Navigating the Short-Term Rental Market
By: John Macomber, Juan Pablo Heusser Killing, Siddhant Pardeshi and Sally Su
Short-term rentals listed via apps like AirBnB and VRBO are increaslingly interesting investments for small scale real estate investors. However, they have substantial operating costs, vacancy risk, and regulatory exposure compared to traditional long term leases... View Details
- March 2025
- Case
Hurtigruten: Sea Zero
By: Christian Kaps and Michael W. Toffel
Hurtigruten was deciding whether the next ship they built should be fully electric. But such a vessel's battery, the size of electric cars, needed to be charged on the ship's multi-day voyage along the Norwegian coast. Before making such a $250 million investment, the... View Details
Keywords: Energy Sources; Alternative Energy; Ship Transportation; Environmental Regulation; Environmental Sustainability; Innovation and Management; Green Technology; Investment; Corporate Social Responsibility and Impact; Shipping Industry; Tourism Industry; Transportation Industry; Travel Industry; Battery Industry; Norway; Europe
- March 2025
- Case
Silicon Valley Bank: Gone in 36 Hours
This case examines factors contributing to the collapse of Silicon Valley Bank (SVB) in March 2023, an event as unpredicted as it was quick. SVB funded nearly half of all U.S. venture-backed startups and at the end of 2022 held $173 billion in deposits, largely... View Details
Keywords: Accounting Standards; Bank Runs; Financial Accounting; Financial Reporting; Social Media; Banks and Banking; Financing and Loans; Investment Portfolio; Interest Rates; Debt Securities; Risk and Uncertainty; Financial Statements; Risk Management; Failure; Fair Value Accounting; Credit; Corporate Governance; Financial Services Industry; Banking Industry; United States
- 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
- 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
- March 2025 (Revised April 2025)
- Case
WallStreetBets: Democratizing Retail Investing
By: Joseph Pacelli and Alexis Lefort
In summer 2024, Jaime Rogozinski anticipated the launch of a day-trading eSports event, a vision he had nurtured for years. Rogozinski, the founder of the influential subreddit WallStreetBets (WSB), created the forum in 2012 as a space for retail traders to explore... View Details
- March 2025 (Revised March 2025)
- Case
Good for the Seller, Good for the Buyer and Good for Society: Sampo-yoshi, Sustainability and Trust at ITOCHU
By: Sandra J. Sucher and Bethelehem Y Araya
In 2024, ITOCHU CEO Masahiro Okafuji was at a crossroads. As the thirteenth CEO since ITOCHU’s founding in 1858, he had fueled the company’s growth since 2011 by bringing ITOCHU’s founding philosophy of Sampo-yoshi (good for the seller, good for the buyer and... 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
- 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
- March 2025 (Revised May 2025)
- Case
Primetime Partners: Investing in Healthspan, Wealthspan, and Workspan
By: Rembrand Koning, Nicole Tempest Keller and Susan Wilner Golden
In the fall of 2024, Abby Miller Levy (HBS ’01), co-founder and managing partner of Primetime Partners, was preparing to raise a second fund. Founded in 2020 with veteran investor Alan Patricof, Primetime was a horizontal fund focused on early-stage companies serving... View Details
- February 2025 (Revised May 2025)
- Case
Align Partners and SM Entertainment: Korean Shareholder Activism Meets K-Pop (A)
By: Charles C.Y. Wang and Billy Chan
For years, institutional investors had experienced very limited success in influencing the management of listed companies through shareholder activist campaigns in Korea. The common practice of circular ownership and public resentment toward foreign shareholder... View Details
- February 2025
- Supplement
Align Partners and SM Entertainment: Korean Shareholder Activism Meets K-Pop (B)
By: Charles CY Wang and Billy Chan
For years, institutional investors had experienced very limited success in influencing the management of listed companies through shareholder activist campaigns in Korea. The common practice of circular ownership and public resentment toward foreign shareholder... View Details
- February 2025
- Case
RedBird Capital Partners
By: Anita Elberse and David Moreno Vicente
In July 2024, Gerry Cardinale, the founder and managing partner of RedBird Capital Partners (‘RedBird’) has helped orchestrate a high-profile deal in the world of entertainment: one in which Skydance Media (‘Skydance’), a content production studio led by David Ellison... View Details
- February 2025
- Case
Blue Owl Financing of Ping Identity
By: Victoria Ivashina and Srimayi Mylavarapu
In the fall of 2022, Blue Owl Capital's investment committee evaluated a potential investment in the technology sector. The proposed transaction centered on Ping Identity Corporation (“Ping”), a fast-growing identity access management (IAM) software company that was... View Details
- February 2025
- Case
Doing Business in Kigali, Rwanda
By: Andy Zelleke, Martin A. Sinozich, Julianne Bliss and Choetsow Tenzin
Rwanda’s transformation from a post-genocide recovery effort to one of Africa’s fastest-growing economies presents a compelling case for investors and business leaders. With an ambitious Vision 2050 strategy, Kigali has emerged as a regional hub for trade, innovation,... View Details
- 2025
- Working Paper
Dynamic Personalization with Multiple Customer Signals: Multi-Response State Representation in Reinforcement Learning
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
- 2025
- Working Paper
Impact Investing and Worker Outcomes
By: Josh Lerner, Markus Lithell and Gordon M. Phillips
Impact investors claim to distinguish themselves from traditional venture capital and growth
equity investors by also pursuing environmental, social, and governance (ESG) objectives.
Whether they successfully do so in practice is unclear. We use confidential Census... View Details
- January 2025
- Case
Arsenal Capital Partners' Refinancing of Pinnacle
By: Victoria Ivashina and Srimayi Mylavarapu
Arsenal Capital Partners’ portfolio company, Pinnacle, a leading producer of high-performance adhesive technologies, has experienced rapid growth under Arsenal’s ownership. Over just two years, Pinnacle's EBITDA increased from $13.5 million to $60 million. By mid-2021,... View Details