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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
Keywords: Competition; Product Positioning; Marketing Strategy; Acquisition; Technology Industry; Communications Industry
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  • June 2012 (Revised July 2013)
  • Exercise

Competition Simulator Exercise: Instructions

By: Eric Van den Steen
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: Competitive Strategy; Economics; Strategy; Game Theory
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  • June 2013 (Revised November 2022)
  • Exercise

Competition Simulator Exercise

By: Eric J. Van den Steen
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
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    David B. Yoffie

    Professor David B. Yoffie is the Max and Doris Starr Professor of International Business Administration at Harvard Business School. A member of the HBS faculty since 1981, Professor Yoffie received his Bachelor's degree summa cum laude and Phi Beta... View Details

    Keywords: communications; computer; e-commerce industry; electronics; financial services; information; information technology industry; internet; retail financial services; semiconductor; soft drink; telecommunications; video games
    • 03 Dec 2001
    • What Do You Think?

    What Happens When the Sumo Master Learns Judo?

    does not trust Microsoft and its use of 'customer' information to market to customers and hold them digitally captive. This demographic will continue to provide sales to (a judo master competitor)." These comments reflect general... View Details
    Keywords: by James Heskett
    • 01 Aug 2002
    • News

    For Alumni Only: Breakthrough Insights Program Debuts

    that using the judo strategy approach allows small, agile start-ups to turn an opponent's size into a disadvantage. The closing presentation was delivered by Senior Research Fellow and Director of the HBS... View Details
    Keywords: Laura Singleton
    • 07 Mar 2024
    • Blog Post

    IFC India: Green-tech Entrepreneurship in India

    functionality and cost over time over features and require robust solutions for extensive daily use. This approach is not only pragmatic but also resonates with the Indian market, where commercial vehicles are essential to the economy and the environment. With this... View Details
    • 02 Feb 2004
    • Research & Ideas

    Where Does Apple Go From Here?

    investment. "Now, obviously, the company is doing much better since Jobs returned to the CEO job; but having said that, it has not yet reached the value that it was in the early 1990s," Yoffie points out. Yoffie, whose book Judo... View Details
    Keywords: by Sean Silverthorne
    • 20 Aug 2013
    • First Look

    First Look: August 20

    green building, including evolving boundaries of professional jurisdictions; changing industry strategies and structures, including the roles of ownership, supply firms, and market niches; new operational, organizational, and cultural... View Details
    Keywords: Anna Secino
    • 26 May 2003
    • Research & Ideas

    What Your Competition is Telling You

    player] has created—and then do things they can't," he says. For example, Cisco essentially created the market for Internet routers that help enterprise customers "link together different types of computers," writes Yoffie in his book View Details
    Keywords: by David Stauffer
    • 29 Jul 2014
    • First Look

    First Look: July 29

    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 it in volume. The case considers judo View Details
    Keywords: Sean Silverthorne
    • Web

    Print View - Course Catalog

    pursue a career related to technology. Indeed, the concepts and frameworks covered (e.g., network effects, judo strategy, multisided platforms) apply well beyond technology industries. Copyright © 2023 President & Fellows of Harvard... View Details