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- All HBS Web
(661)
- People (2)
- News (171)
- Research (356)
- Events (2)
- Multimedia (5)
- Faculty Publications (222)
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- April 2017 (Revised May 2022)
- Case
King Digital Entertainment
By: Jeffrey F. Rayport, Davide Sola, Federica Gabrieli and Elena Corsi
Riccardo Zacconi was the co-founder and CEO of King Digital Entertainment, the video game company that had quickly established itself as the world’s leading maker of casual games for mobile devices after the sensational success of its game “Candy Crush Saga.” Zacconi... View Details
Keywords: Entrepreneurship; Information Technology; Growth and Development Strategy; Organizational Structure; Acquisition; Decision Choices and Conditions; Video Game Industry; Europe; Sweden
Rayport, Jeffrey F., Davide Sola, Federica Gabrieli, and Elena Corsi. "King Digital Entertainment." Harvard Business School Case 817-117, April 2017. (Revised May 2022.)
- May 2018 (Revised February 2019)
- Case
The Powers That Be (Internet Edition): Google, Apple, Facebook, Amazon, and Microsoft
By: Jeffrey F. Rayport, Julia Kelley and Nathaniel Schwalb
As of early 2018, five U.S. technology companies—Google, Apple, Facebook, Amazon, and Microsoft—were among the largest companies in the world. Similarly, three Chinese technology firms—Baidu, Alibaba, and Tencent, or BAT—had emerged as global players due in part to the... View Details
Keywords: Internet and the Web; Business Ventures; Customers; Analytics and Data Science; Safety; Corporate Strategy; Competitive Strategy; Technology Industry
Rayport, Jeffrey F., Julia Kelley, and Nathaniel Schwalb. "The Powers That Be (Internet Edition): Google, Apple, Facebook, Amazon, and Microsoft." Harvard Business School Case 818-111, May 2018. (Revised February 2019.)
- April 2021
- Case
Codecademy: Where to Next?
By: Jeffrey F. Rayport, Max Mailman and Sarah Ascherman
In March 2020, Zach Sims, co-founder and CEO of online education platform Codecademy, prepared for a meeting with his Chief of Staff Kunal Ahuja to discuss the company’s goals. Codecademy billed itself as the largest online resource for computer science literacy and... View Details
Keywords: Monetization Strategy; Business Model; Change Management; Venture Capital; Leading Change; Growth and Development Strategy; Growth Management; Management Teams; Marketing Channels; Product Marketing; Network Effects; Product Development; Organizational Change and Adaptation; Strategic Planning; Internet and the Web; Digital Platforms; United States
Rayport, Jeffrey F., Max Mailman, and Sarah Ascherman. "Codecademy: Where to Next?" Harvard Business School Case 821-093, April 2021.
- 24 Feb 2009
- First Look
First Look: February 24, 2009
Working PapersLearn-how to Improve Collaboration and Performance Authors:Ingrid M. Nembhard, Anita L. Tucker, Richard M.J. Bohmer, Joseph H. Carpenter, and Jeffrey D. Horbar Abstract Organizational learning, a prerequisite for high... View Details
Keywords: Martha Lagace
- September 2009
- Module Note
Leading Teams Note
This note, which describes the architecture and processes that characterize effective teams, begins by detailing the steps involved in designing a team, from diagnosing the complexity, interdependence, and objectives of the task to harnessing the key resources teams... View Details
Keywords: Interpersonal Communication; Experience and Expertise; Decision Choices and Conditions; Knowledge Sharing; Leadership; Business Processes; Groups and Teams
Polzer, Jeffrey T. "Leading Teams Note." Harvard Business School Module Note 410-051, September 2009.
- January 2024 (Revised June 2024)
- Case
School of Rock: Tuning into Structured Empowerment (A)
By: Tatiana Sandino, Jeffrey Rayport, Samuel Grad and Stacy Straaberg
In summer 2021, School of Rock was a youth-oriented music education company with 291 franchise- and company-owned schools globally. Before CEO Rob Price’s hire in 2017, School of Rock’s nonconformist rock ‘n’ roll culture led to variability in teaching styles,... View Details
Keywords: Business Growth and Maturation; Business Plan; Change Management; Transformation; Communication Strategy; Decisions; Curriculum and Courses; Teaching; Employee Relationship Management; Knowledge Sharing; Leadership Style; Business or Company Management; Growth and Development Strategy; Management Style; Marketing Strategy; Mission and Purpose; Organizational Change and Adaptation; Organizational Culture; Organizational Structure; Franchise Ownership; Performance Expectations; Performance Improvement; Strategic Planning; Attitudes; Conflict Management; Corporate Strategy; Applications and Software; Technology Adoption; Education Industry; Music Industry; Massachusetts; United States
Sandino, Tatiana, Jeffrey Rayport, Samuel Grad, and Stacy Straaberg. "School of Rock: Tuning into Structured Empowerment (A)." Harvard Business School Case 124-043, January 2024. (Revised June 2024.)
- 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.)
- November 22, 2022
- Article
Why Startups Should Embrace Radical Transparency
After high-profile startup failures like FTX or Theranos, investors, employees, customers, and policymakers all ask what might have been done differently to ensure accountability and prevent mismanagement. But startup founders should join that list: It’s in their... View Details
Bussgang, Jeffrey J. "Why Startups Should Embrace Radical Transparency." Harvard Business Review (website) (November 22, 2022).
- 2025
- Book
The Experimentation Machine: Finding Product–Market Fit in the Age of AI
Leverage AI to be a 10x Founder
Today’s most successful founders know that the startups that learn the fastest will win. In The Experimentation Machine, I reveal how AI is transforming the way startups find product-market fit and scale.... View Details
Today’s most successful founders know that the startups that learn the fastest will win. In The Experimentation Machine, I reveal how AI is transforming the way startups find product-market fit and scale.... View Details
Keywords: AI; Founder; Startup; AI and Machine Learning; Technology Adoption; Business Startups; Entrepreneurship; Market Entry and Exit
Bussgang, Jeffrey J. The Experimentation Machine: Finding Product–Market Fit in the Age of AI. Damn Gravity Media, 2025.
- 2017
- Book
Entering StartUpLand: An Essential Guide to Finding the Right Job
Many professionals aspire to work for startups. Executives from large companies view them as models to help them adapt to today's dynamic innovation economy, while freshly minted MBAs see magic in founding something new. Yes, startups look magical, but they can also be... View Details
Bussgang, Jeffrey J. Entering StartUpLand: An Essential Guide to Finding the Right Job. Boston: Harvard Business Review Press, 2017.
- Article
Should I Become an Entrepreneur?
Bussgang, Jeffrey J. "Should I Become an Entrepreneur?" Harvard Business Review (website) (January 21, 2011).
- 03 Jan 2007
- First Look
First Look: January 3, 2007
compared to the opening of new establishments by existing firms. We find interstate banking deregulations had a strong positive effect on the birth of new firms relative to the facility expansions of existing firms. We find limited... View Details
Keywords: Sean Silverthorne
- 19 Dec 2006
- First Look
First Look: December 19, 2006
http://www.oup.com/uk/catalogue/?ci=9780195310627 The Comovement of Returns and Investment within International Firms Authors:Mihir A. Desai and C. Fritz Foley Publication:In NBER International Seminar on Macroeconomics, edited by Richard... View Details
Keywords: Sean Silverthorne
- Article
Can Mutual Fund Managers Pick Stocks? Evidence from Their Trades Prior to Earnings Announcements
By: Malcolm Baker, Lubomir Litov, Jessica Wachter and Jeffrey Wurgler
We consider measures of stock-picking skill of mutual fund managers based on the earnings announcement returns of the stocks that they hold and trade. Relative to standard approaches, this approach focuses on an especially informative subset of the returns data,... View Details
Baker, Malcolm, Lubomir Litov, Jessica Wachter, and Jeffrey Wurgler. "Can Mutual Fund Managers Pick Stocks? Evidence from Their Trades Prior to Earnings Announcements." Journal of Financial and Quantitative Analysis 45, no. 5 (October 2010): 1111 –1131.
- June 2013
- Article
Signals across Multiple Networks: How Venture Capital and Alliance Networks Affect Interorganizational Collaboration
By: Umit Ozmel, Jeffrey J. Reuer and Ranjay Gulati
In this paper, we examine the contingent effects of signals generated by different types of networks on new ventures' formation of future strategic alliances. We argue that the signaling value of a given tie in reducing adverse selection is more pronounced when another... View Details
Ozmel, Umit, Jeffrey J. Reuer, and Ranjay Gulati. "Signals across Multiple Networks: How Venture Capital and Alliance Networks Affect Interorganizational Collaboration." Academy of Management Journal 56, no. 3 (June 2013): 852–866.
- May–June 1996
- Article
Ruling the Net
By: Jeffrey Bussgang and Debora Spar
Bussgang, Jeffrey, and Debora Spar. "Ruling the Net." Harvard Business Review 74, no. 3 (May–June 1996): 125–133.
- 08 Jan 2019
- First Look
New Research and Ideas, January 8, 2019
to deliver high-quality goods or services in a cost-effective manner. This concept has become increasingly relevant to cardiac catheterization laboratories, as insurers move away from fee-for-service reimbursement and toward payment determined View Details
Keywords: Dina Gerdeman
- 03 May 2011
- First Look
First Look: May 3
http://hbr.org/2011/05/column-the-hollow-science/ar/1 Effective Managers Say the Same Thing Twice (or More) Authors:Tsedal Neeley and Paul Leonardi Publication:Harvard Business Review 89, no. 5 (May 2011) Abstract How do effective managers get employees to act... View Details
Keywords: Sean Silverthorne
- July 16, 2016
- Article
A Game Theoretic Model for Resource Allocation Among Countermeasures with Multiple Attributes
By: Elisabeth C. Paulson, Igor Linkov and Jeffrey Keisler
We study a strategic, two-player, sequential game between an attacker and defender. The defender must allocate resources amongst possible countermeasures and across possible targets. The attacker then chooses a type of threat and a target to attack. This paper proposes... View Details
Paulson, Elisabeth C., Igor Linkov, and Jeffrey Keisler. "A Game Theoretic Model for Resource Allocation Among Countermeasures with Multiple Attributes." European Journal of Operational Research 252, no. 2 (July 16, 2016): 610–622.
- June 2024
- Supplement
VC Journey Vignette (B): Navigating Turbulent Times
By: Jeffrey J. Bussgang and Jackie Grant
Bussgang, Jeffrey J., and Jackie Grant. "VC Journey Vignette (B): Navigating Turbulent Times." Harvard Business School Supplement 824-206, June 2024.