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- 2025
- Article
Difference-in-Differences Subset Scan
By: Will Stamey, Sriram Somanchi and Edward McFowland III
Difference-in-differences (DiD) has been extensively applied in the literature to elicit the average causal effect of an intervention or policy. Though researchers explore heterogeneity in the treatment effect with respect to time or some observed covariate (usually... View Details
- June 2025
- Case
Zerodha
By: Das Narayandas and Kairavi Dey
Zerodha Broking Pvt. Ltd. (Zerodha) was among India's largest online broking platforms. Nithin and Nikhil Kamath started Zerodha to empower retail investors and remove the hurdles to investing in stocks. The company pioneered tech-first discount broking, charging... View Details
Keywords: Financial Services Industry
- 2025
- Working Paper
Who Ends Up at Jobs in Impact Investing?
By: Shawn Cole, Marcus Sander and Jonah Zahnd
As the impact investing industry has grown, so too has students’ desire to find employment in jobs tasked with the dual mandate of creating financial and social or environmental returns. There is to date relatively little information available on employment in the... View Details
- April 2025
- Teaching Note
Tabby: Winning Customers' Digital Wallets
By: Eva Ascarza
Teaching Note for HBS Case No. 524-056. Tabby, a Saudi-based fintech founded in 2019, rapidly became one of the MENA region’s first unicorns by offering buy-now-pay-later (BNPL) services with a unique twist: instead of charging end consumers, it partnered with... View Details
- 2025
- Working Paper
Extractive Taxation and the French Revolution
By: Tommaso Giommoni, Gabriel Loumeau and Marco Tabellini
We study the fiscal determinants of the French Revolution, exploiting plausibly exogenous variation in the salt tax—a large source of royal revenues and one of the most extractive forms of taxation of the Ancien Régime. Implementing a Regression Discontinuity... 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
- February 2025
- Case
Fly, Fix, Fly at True Anomaly
By: Joshua Lev Krieger, Jim Matheson, Fiona Murray and David Allen
How should companies learn from failure? Founded by four U.S. Space Force warfighters, the tough tech startup True Anomaly wanted to compete with major defense contractors to supply the U.S. Department of Defense with satellites and software that could help protect... 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
- Article
Disclosure, Humanizing, and Contextual Vulnerability of Generative AI Chatbots
By: Julian De Freitas and I. Glenn Cohen
In the wake of recent advancements in generative AI, regulatory bodies are trying to keep pace. One key decision is whether to require app makers to disclose the use of generative AI-powered chatbots in their products. We suggest that some generative AI-based chatbots... View Details
- 2025
- Book
Space to Grow: Unlocking the Final Economic Frontier
By: Matthew Weinzierl and Brendan Rosseau
Your guide--using the compelling stories of changemakers and the tools of economics--to the transformation and future possibilities of the business and economics of space.
Space is a place of unparalleled possibility for humanity, and it's undergoing a... View Details
Space is a place of unparalleled possibility for humanity, and it's undergoing a... View Details
- January 2025
- Case
Hebbia: Redefining Productivity for Knowledge Workers Using AI
By: Suraj Srinivasan and Minoshka Narayan
In early 2025, George Sivulka, founder and CEO of Hebbia, reflected on the company’s rapid ascent as a pioneer in GenAI-powered productivity tools for knowledge workers. With its proprietary technology, Hebbia had redefined information retrieval and analysis and earned... View Details
Keywords: Transformation; Customer Relationship Management; AI and Machine Learning; Innovation and Management; Innovation Strategy; Service Delivery; Technological Innovation; Growth and Development Strategy; Competitive Strategy; Banking Industry; Financial Services Industry; Technology Industry; United States; New York (city, NY)
- January 2025
- Case
The Vision of Wonder
By: Michael S. Kaufman and Daniella Bertolotti
Serial entrepreneur Marc Lore successfully disrupted three marketplaces—trading cards, diapers (founded Diapers.com and eventually sold to Amazon for more than $500 million) and ecommerce (founded Jet.com competing directly with Amazon and eventually sold to Walmart... View Details
- December 2024
- Article
Proximate (Co-)Working: Knowledge Spillovers and Social Interactions
By: Maria P. Roche, Alexander Oettl and Christian Catalini
We examine the influence of physical proximity on between-start-up knowledge spillovers at one of the largest technology coworking hubs in the United States. Relying on the exogenous assignment of office space to the hub’s 251 start-ups, we find that proximity... View Details
- October 2024
- Case
EU's Digital Services Act and Digital Markets Act
By: David B. Yoffie and Sarah von Bargen
Since the early 2020s, the EU began passing regulations on digital platforms and their marketplaces. One of the first was the Digital Services Act package, consisting of the Digital Services Act (DSA) and the Digital Markets Act (DMA). These regulations were focused on... View Details
- October 2024
- Case
Reed Group and Succession in a Family Business: An Impossible Job to Fill?
By: Lauren H. Cohen and Tonia Labruyere
James Reed had taken over Reed Group, the recruitment and career services company his father had founded and built, in 1994. He was now reflecting on succession planning and other challenges that lay ahead: with no obvious choice among his family members, he needed to... View Details
- September–October 2024
- Article
Boards Need a New Approach to Technology
By: Tarun Khanna, Mary C. Beckerle and Nabil Y. Sakkab
The boards of too many publicly traded companies are downright timid when considering matters involving science and technology. More often than not, they focus on security and digitization—a defensive posture that fails to consider the bigger opportunities emerging... View Details
- October 2024
- Background Note
Space Capitalism and the Final Frontier
By: Sophus A. Reinert, Ryan Spatz and Bobby Faith
- August 2024 (Revised December 2024)
- Case
Influencer-Led Brand Building: Hairitage and the McKnights
By: William R. Kerr, Daniel O'Connor and James Palano
Longtime hairstyle influencer Mindy McKnight had been building her “Cute Girls Hairstyles” audience across numerous online platforms for nearly two decades. Brand incubator Maesa took an innovative approach to producing successful brands: identifying white space in the... View Details
- August 2024
- Case
Sky Therapeutics: Innovating in Digital Therapeutics
By: Satish Tadikonda, Olivia Reszczynski and William Marks
Shad Faraz and Alex Youssef were intrigued by the opportunities in the relatively new area of Digital Therapeutics. Despite initial successes, early entrants had struggled with reimbursement and revenue-predictability challenges. However, venture investors still... View Details
- August 2024
- Case
Zipline: Expanding the World's Largest Autonomous Drone Delivery Network
By: Tarun Khanna and George Gonzalez
Zipline initially established the world's largest logistics network in Rwanda and Ghana by delivering medical supplies to hospitals via automated drones from a centralized hub. The company is now looking to expand to the U.S. home delivery market and designed a... View Details