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- Faculty Publications (475)
Show Results For
- All HBS Web (2,037)
- Faculty Publications (475)
- January 2025 (Revised April 2025)
- Case
Duolingo: On a 'Streak'
By: Jeffrey F. Rayport, Nicole Tempest Keller and Nicole Luo
In December 2024, Severin Hacker, Co-Founder and Chief Technology Officer of Duolingo, reflected on the remarkable evolution of the language-learning app he helped launch in 2011. As the #1 most downloaded education app in the world, Duolingo had over 100 million... View Details
Keywords: Learning; AI and Machine Learning; Growth and Development Strategy; Motivation and Incentives; Diversification; Business Model; Market Entry and Exit; Technology Industry; Education Industry; United States
Rayport, Jeffrey F., Nicole Tempest Keller, and Nicole Luo. "Duolingo: On a 'Streak'." Harvard Business School Case 825-097, January 2025. (Revised April 2025.)
- April 2015
- Case
Carolinas HealthCare System: Consumer Analytics
By: John A. Quelch and Margaret L. Rodriguez
In 2014, Dr. Michael Dulin, chief clinical officer for analytics and outcomes research and head of the Dickson Advanced Analytics (DA2) group at Carolinas HealthCare System (CHS), successfully unified all analytics talent and resources into one group over a three year... View Details
Keywords: Consumer Segmentation; Big Data; Management Information Systems; Hospital Management; Health Care and Treatment; Marketing; Segmentation; Analytics and Data Science; Information Management; Information Technology; Health; Health Industry; United States
Quelch, John A., and Margaret L. Rodriguez. "Carolinas HealthCare System: Consumer Analytics." Harvard Business School Case 515-060, April 2015.
- 2014
- Chapter
The Intensive Margin of Technology Adoption
By: Diego A. Comin
We present a tractable model for analyzing the relationship between economic growth and the intensive and extensive margins of technology adoption. The "extensive" margin refers to the timing of a country's adoption of a new technology; the "intensive" margin refers to... View Details
Keywords: Economic Growth; Microeconomics; Cross-Cultural and Cross-Border Issues; Analytics and Data Science; Growth and Development Strategy; Relationships; Technology Adoption
Comin, Diego A. "The Intensive Margin of Technology Adoption." In Handbook of Economic Growth. Vol. 2 edited by Philippe Aghion and Steven Durlauf. Amsterdam: Elsevier, 2014.
- 06 Oct 2020
- Blog Post
2+2 Where Are They Now Spotlight: Curtis Wu (MBA 2018)
Charles Cooney, taught me that the hardest problems often occur at interfaces between multiple sectors. The 2+2 program offered me a way to learn the language and tools I would need to tackle tough problems at the interface of science and... View Details
- 2012
- Working Paper
The Need for (long) Chains in Kidney Exchange
By: Itai Ashlagi, David Gamarnik, Michael A. Rees and Alvin E. Roth
It has been previously shown that for sufficiently large pools of patient-donor pairs, (almost) efficient kidney exchange can be achieved by using at most 3-way cycles, i.e., by using cycles among no more than 3 patient-donor pairs. However, as kidney exchange has... View Details
Keywords: Networks; Complexity; Performance Efficiency; Medical Specialties; Health Care and Treatment; Philanthropy and Charitable Giving
Ashlagi, Itai, David Gamarnik, Michael A. Rees, and Alvin E. Roth. "The Need for (long) Chains in Kidney Exchange." NBER Working Paper Series, No. 18202, July 2012.
- 2008
- Working Paper
Allocating Marketing Resources
By: Sunil Gupta and Thomas J. Steenburgh
Marketing is essential for the organic growth of a company. Not surprisingly, firms spend billions of dollars on marketing. Given these large investments, marketing managers have the responsibility to optimally allocate these resources and demonstrate that these... View Details
Keywords: Investment Return; Resource Allocation; Marketing; Demand and Consumers; Mathematical Methods
Gupta, Sunil, and Thomas J. Steenburgh. "Allocating Marketing Resources." Harvard Business School Working Paper, No. 08-069, February 2008.
- 2008
- Chapter
Allocating Marketing Resources
By: Sunil Gupta and Thomas J. Steenburgh
Companies spend billions of dollars on marketing every year because it is essential to organic growth. Given these large investments, marketing managers have the responsibility to optimally allocate resources and to demonstrate that their investments generate... View Details
Keywords: Investment Return; Resource Allocation; Marketing; Demand and Consumers; Mathematical Methods
Gupta, Sunil, and Thomas J. Steenburgh. "Allocating Marketing Resources." In Marketing Mix Decisions: New Perspectives and Practices, edited by Roger A. Kerin and Rob O'Regan. Chicago, IL: American Marketing Association, 2008.
- 2011
- Working Paper
Charitable Giving When Altruism and Similarity Are Linked
By: Julio J. Rotemberg
This paper presents a model in which anonymous charitable donations are rationalized by two human tendencies drawn from the psychology literature. The first is people's disproportionate disposition to help those they agree with while the second is the dependence of... View Details
Keywords: Philanthropy and Charitable Giving; Mathematical Methods; Attitudes; Interests; Perception; Wealth and Poverty
Rotemberg, Julio J. "Charitable Giving When Altruism and Similarity Are Linked." NBER Working Paper Series, No. 17585, November 2011.
- Research Summary
Team-based strategic work among senior executives
My research centers on a study of organizational design for senior-executive work on strategy. I examine the role of small groups that are tasked with resolving strategic issues, and I consider the effects of such team-based organizing models on strategic... View Details
- June 2008
- Article
Minimally Acceptable Altruism and the Ultimatum Game
By: Julio J. Rotemberg
I suppose that people react with anger when others show themselves not to be minimally altruistic. With heterogeneous agents, this can account for the experimental results of ultimatum and dictator games. Moreover, it can account for the surprisingly large fraction of... View Details
Rotemberg, Julio J. "Minimally Acceptable Altruism and the Ultimatum Game." Journal of Economic Behavior & Organization 66, nos. 3-4 (June 2008).
- June 2007 (Revised March 2008)
- Case
Zoots - Financing Growth (A)
By: Michael J. Roberts, William A. Sahlman and Todd Krasnow
Traces the genesis and founding of Zoots, the largest chain of dry cleaning establishments in the U.S. Founded by some of the founders of the very successful Staples chain, the company raises a very large amount of capital without fully proving its business model, and... View Details
Keywords: Business Startups; Decision Choices and Conditions; Venture Capital; Financial Strategy; Investment Return; Growth and Development Strategy; Valuation; United States
Roberts, Michael J., William A. Sahlman, and Todd Krasnow. "Zoots - Financing Growth (A)." Harvard Business School Case 807-139, June 2007. (Revised March 2008.)
- 07 Feb 2019
- Book
How Big Companies Can Outrun Disruption
young, entrepreneurial companies come on the scene and sweep away large incumbent enterprises. He famously wrote in 1939 that big companies become, in his words, like old men, losing their innovative vitality as they age. We have seen the... View Details
Keywords: by Martha Lagace
- March 2014
- Teaching Note
Intuit QuickBooks: From Product to Platform
By: Andrei Hagiu and Elizabeth J. Altman
This case focuses on the challenges and opportunities faced by a successful incumbent organization attempting to transform a large portion of its business from a traditionally product-centric operating mode to a platform-based one that leverages network effects to... View Details
- January 2020 (Revised July 2020)
- Case
BlackRock: Linking Purpose to Profit
By: Aiyesha Dey
The case revolves around the actions that Barbara Novick, co-founder and Vice-Chair of Blackrock, and Michelle Edkins, Global Head of Investment Stewardship, would need to take in response to the controversial CEO letters from Laurence (Larry) Fink, Chairman and CEO of... View Details
Keywords: Boards Of Directors; Institutional Investors; Disclosure; Transparency; Corporate Purpose; Corporate Profits; ESG; ESG Disclosure Metrics; Corporate Sustainability; Engagement Strategy Of Institutions; Stewardship Role Of Institutions; BlackRock; Corporate Governance; Governing and Advisory Boards; Institutional Investing; Accounting; Corporate Disclosure; Mission and Purpose; Profit; Environmental Sustainability; Climate Change; Diversity; Corporate Accountability; Financial Services Industry; United States
Deshpandé, Rohit, Aiyesha Dey, and George Serafeim. "BlackRock: Linking Purpose to Profit." Harvard Business School Case 120-042, January 2020. (Revised July 2020.)
- 11 Feb 2025
- HBS Seminar
Brett Hollenbeck, University of California, Los Angeles
- July 2016
- Article
Taxation, Corruption, and Growth
By: Philippe Aghion, Ufuk Akcigit, Julia Cagé and William R. Kerr
We build an endogenous growth model to analyze the relationships between taxation, corruption, and economic growth. Entrepreneurs lie at the center of the model and face disincentive effects from taxation but acquire positive benefits from public infrastructure.... View Details
Keywords: Endogenous Growth; Public Goods; Corruption; Crime and Corruption; Entrepreneurship; Taxation; Economic Growth
Aghion, Philippe, Ufuk Akcigit, Julia Cagé, and William R. Kerr. "Taxation, Corruption, and Growth." Special Issue on The Economics of Entrepreneurship. European Economic Review 86 (July 2016): 24–51.
- August 2013
- Article
The Timing of Pay
By: Christopher Parsons and E. Van Wesep
There exists large and persistent variation in not only how, but when employees are paid, a fact unexplained by existing theory. This paper develops a simple model of optimal pay timing for firms. When workers have self-control problems, they under-save... View Details
Keywords: Payday Lending; Hyperbolic Discounting; Self-control Problems; Pay Frequency; Payday Loan Legislation; Paycheck Frequency; Time Inconsistency; Wages; Behavior; Employee Relationship Management
Parsons, Christopher, and E. Van Wesep. "The Timing of Pay." Journal of Financial Economics 109, no. 2 (August 2013): 373–397.
- December 2012
- Case
Blink Booking
By: William R. Kerr, Magnus Thor Torfason and Alexis Brownell
Rebeca Minguela hopes to create an arbitrage platform, similar to Rocket Internet, that can bring start-up ideas and opportunities to Spain. However, Blink Booking, her first venture and proof of concept, is rocked by a co-founder's breach of confidence and departure.... View Details
Keywords: Clones; Cloning; Rocket Internet; Start-up; Equity Split; Arbitrage; Incubator; Mobile App; Expansion; Spain; Europe; Entrepreneurship; Ethics; Internet and the Web; Information Technology Industry; Accommodations Industry; Travel Industry; Spain; Europe
Kerr, William R., Magnus Thor Torfason, and Alexis Brownell. "Blink Booking." Harvard Business School Case 813-121, December 2012.
- December 2010
- Article
Altruistic Dynamic Pricing with Customer Regret
By: Julio J. Rotemberg
A model is considered where firms internalize the regret costs that consumers experience when they see an unexpected price change. Regret costs are assumed to be increasing in the size of price changes and this can explain why the size of price increases is less... View Details
Keywords: Cost; Price; Change; Inflation and Deflation; Cost Management; Customers; Practice; Announcements; Forecasting and Prediction
Rotemberg, Julio J. "Altruistic Dynamic Pricing with Customer Regret." Scandinavian Journal of Economics 112, no. 4 (December 2010).
- 2009
- Working Paper
Altruistic Dynamic Pricing with Customer Regret
By: Julio J. Rotemberg
A model is considered where firms internalize the regret costs that consumers experience when they see an unexpected price change. Regret costs are assumed to be increasing in the size of price changes and this can explain why the size of price increases is less... View Details