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- Faculty Publications (12)
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- June 2023 (Revised November 2024)
- Case
Collaboration Wars: Slack vs. Microsoft Teams 2023
By: David B. Yoffie, Kriti Gupta, Mehek Punatar, Poonam Sacheti and Poorvi Vijay
What's the future of corporate communications? Email? Corporate messaging? The battle for corporate messaging in 2023 was stacking up as a fight between Slack, which had been recently acquired by Salesforce, and Microsoft Teams. This case explores a classic judo... View Details
- April 2019
- Teaching Note
The a2 Milk Company
By: Benjamin C. Esty and Daniel Fisher
The a2 Milk Company (a2MC) became the most valuable company listed on the New Zealand stock exchange in 2018 by capitalizing on a biochemical discovery related to the protein composition of cow's milk. Because many people find the A1 protein difficult to digest, and... View Details
Keywords: Judo Economics; Market Entry; Innovation; Barriers To Response; Industry Attractiveness; Advantage Horizon; Sustainability; First-mover Advantage; Scope; Strategy Execution; Strategic Evolution; Biochemistry; Genetics; Branding; Commodity; Milk; Dairy; Infant Formula; Farming; Porter's Five Forces; Market Entry and Exit; Disruption; Innovation and Invention; Competitive Advantage; Corporate Strategy; Value Creation; Competition; Brands and Branding; Five Forces Framework; Consumer Products Industry; New Zealand; Australia; China
- February 2019 (Revised September 2021)
- Case
The a2 Milk Company
By: Benjamin C. Esty and Daniel Fisher
The a2 Milk Company (a2MC) became the most valuable company listed on the New Zealand stock exchange in 2018 by capitalizing on a biochemical discovery related to the protein composition of cow's milk. Because many people find the A1 protein difficult to digest, and... View Details
Keywords: Judo Economics; Market Entry; Innovation; Barriers To Response; Industry Attractiveness; Advantage Horizon; Sustainability; First-mover Advantage; Scope; Strategy Execution; Strategic Evolution; Biochemistry; Genetics; Branding; Commodity; Milk; Dairy; Infant Formula; Farming; Porter's Five Forces; Competitive Advantage; Corporate Strategy; Value Creation; Competition; Disruption; Innovation and Invention; Five Forces Framework; Market Entry and Exit
- January 2019 (Revised February 2019)
- Supplement
The a2 Milk Company
By: Benjamin C. Esty, Daniel Fisher and Greg Saldutte
The a2 Milk Company (a2MC) became the most valuable company listed on the New Zealand stock exchange in 2018 by capitalizing on a biochemical discovery related to the protein composition of cow's milk. Because many people find the A1 protein difficult to digest, and... View Details
Keywords: Judo Economics; Market Entry; Innovation; Barriers To Response; Industry Attractiveness; Advantage Horizon; Sustainability; First-mover Advantage; Scope; Strategy Execution; Strategic Evolution; Biochemistry; Genetics; Branding; Commodity; Milk; Dairy; Infant Formula; Farming; Porter's Five Forces; Competitive Advantage; Corporate Strategy; Value Creation; Competition; Market Entry and Exit; Disruption; Innovation and Invention; Five Forces Framework; Consumer Products Industry; New Zealand; Australia; China
- March 2014 (Revised March 2018)
- Case
Red Bull (A)
By: Eric Van den Steen and Carin-Isabel Knoop
Despite facing giants like Coke, Pepsi, and Budweiser—with obvious potential sources of competitive advantage—Red Bull had established itself as the U.S. market leader in energy drinks. By 2008, however, Red Bull's dominance was challenged as Monster drinks surpassed... View Details
- July 2013
- Technical Note
Competition Simulator Exercise: Questions
In the Competition Simulator Exercise, students explore through trial and error some important economic foundations of competitive strategy and managerial economics. In particular, the simulator lets students explore horizontal differentiation with and without price... View Details
- June 2013 (Revised November 2022)
- Exercise
Competition Simulator Exercise
In the Competition Simulator Exercise, students explore through trial and error some important economic foundations of competitive strategy and managerial economics. In particular, the nine simulator exercises let students explore horizontal differentiation with and... View Details
Keywords: Competition; Economics; Game Theory; Competitive Strategy; Learning; Mathematical Methods; Analysis
- June 2012 (Revised July 2013)
- Exercise
Competition Simulator Exercise: Instructions
In the Competition Simulator Exercise, students explore through trial and error some important economic foundations of competitive strategy and managerial economics. In particular, the nine simulator exercises let students explore horizontal differentiation with and... View Details
- Article
Judo Strategy: 10 Techniques for Beating a Stronger Opponent
By: David Yoffie and Mary Kwak
Keywords: Strategy
- January–February 1999
- Article
Judo Strategy: The Competitive Dynamics of Internet Time
By: D. B. Yoffie and M. A. Cusumano