Publications

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

April 2023
Article

The Preference Survey Module: A Validated Instrument for Measuring Risk, Time, and Social Preferences

By: Armin Falk, Anke Becker, Thomas Dohmen, David B. Huffman and Uwe Sunde

Incentivized choice experiments are a key approach to measuring preferences in economics but are also costly. Survey measures are a low-cost alternative but can suffer from additional forms of measurement error due to their hypothetical nature. This paper seeks to... View Details

Keywords: Survey Validation; Experiment; Preference Measurement; Surveys; Economics; Behavior; Measurement and Metrics

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March 2023 (Revised June 2023)
Case

Metaverse Wars

By: Andy Wu, David B. Yoffie and Matt Higgins

In 2023, the term metaverse — a combination of “meta” and “universe” — had become a catch-all for a diverse set of expectations about online virtual worlds and the future of the internet. To some, the metaverse conjured images of a massive participatory videogame... View Details

Keywords: Metaverse; Technology; Virtual Reality; Facebook; Social Media; Technological Innovation; Internet and the Web; Technology Adoption

2023
Article

A Randomized Trial of Behavioral Nudges Delivered through Text Messages to Increase Influenza Vaccination among Patients with an Upcoming Primary Care Visit

By: Mitesh S. Patel, Katherine L. Milkman, Linnea Gandhi, Heather N. Graci, Dena Gromet, Hung Ho, Joseph S. Kay, Timothy W. Lee, Jake Rothschild, Modupe Akinola, John Beshears, Jonathan E. Bogard, Alison Buttenheim, Christopher Chabris, Gretchen B. Chapman, James J. Choi, Hengchen Dai, Craig R. Fox, Amir Goren, Matthew D. Hilchey, Jillian Hmurovic, Leslie John, Dean Karlan, Melanie Kim, David Laibson, Cait Lamberton, Brigitte C. Madrian, Michelle N. Meyer, Maria Modanu, Jimin Nam, Todd Rogers, Renante Rondina, Silvia Saccardo, Maheen Shermohammed, Dilip Soman, Jehan Sparks, Caleb Warren, Megan Weber, Ron Berman, Chalanda N. Evans, Seung Hyeong Lee, Christopher K. Snider, Eli Tsukayama, Christophe Van den Bulte, Kevin G. Volpp and Angela L. Duckworth

Purpose: To evaluate if nudges delivered by text message prior to an upcoming primary care visit can increase influenza vaccination rates.
Design: Randomized, controlled trial.
Setting: Two health systems in the Northeastern US between September 2020 and... View Details

Keywords: Vaccination; Health Care and Treatment; Interpersonal Communication; Communication Technology; Behavior; Health Industry

June 2022 (Revised July 2022)
Teaching Note

The Voice War Continues: Hey Google vs. Alexa vs. Siri in 2022

By: David B. Yoffie

Teaching Note for HBS Case No. 722-462. View Details

May 29, 2022
Article

Pourquoi le business model des plateformes est-il si performant? [Why Is the Platform Business Model So Successful?]

By: Annabelle Gawer, Michael A. Cusumano and David B. Yoffie

May 2022 (Revised July 2022)
Case

The Voice War Continues: Hey Google vs. Alexa vs. Siri in 2022

By: David B. Yoffie and Daniel Fisher

In 2022, after five years of pursuing a new "AI-first" strategy, Google had captured a sizeable share of the American and global markets for voice assistants. Google Assistant was used by hundreds of millions of users around the world, but Amazon retained the largest... View Details

Keywords: Strategy; Artificial Intelligence; Deep Learning; Voice Assistants; Smart Home; Market Share; Globalized Markets and Industries; Competitive Strategy; Digital Platforms; AI and Machine Learning; Technology Industry; United States

January 2022
Supplement

Apple Inc. in 2020 – Select Market Data

By: David B. Yoffie

Supplement to HBS Case No. 720-454, "Apple Inc. in 2020." View Details

January 2022
Teaching Note

Mobileye 2021: Robotaxi and/or Consumer AV?

By: David B. Yoffie

The Mobileye 2021 case is a strategy case developed for the Strategy & Technology course, which is a second year elective at Harvard Business School. The primary purpose of the case is to teach the framework, “Look Forward, Reason Back,” which is described in David... View Details

Keywords: Technology Companies; Robotics; Autonomous Vehicles; Strategy; Decision Making; Transportation; Technological Innovation; Auto Industry; Technology Industry; Transportation Industry; Israel

January 3, 2022
Other Article

Pushing Social Media Platforms to Self-Regulate

By: Michael A. Cusumano, David B. Yoffie and Annabelle Gawer

December 2021 (Revised March 2022)
Case

Collaboration Wars: Slack vs. Microsoft Teams

By: David B. Yoffie, Kriti Gupta, Mehek Punatar, Poonam Sacheti and Poorvi Vijay

In 2021, Slack was acquired by Salesforce. While widely viewed as the best corporate collaboration and messaging software, Slack was being challenged by Microsoft, which was giving away its competitive product, Microsoft Teams, for free with a subscription to... View Details

Keywords: Information Technology; Applications and Software; Technology Adoption; Acquisition; Business Model; Business Strategy; Competitive Strategy; Corporate Strategy; Competition; Expansion; Technology Industry

2021
Article

ThreeDWorld: A Platform for Interactive Multi-Modal Physical Simulation

By: Chuang Gan, Jeremy Schwartz, Seth Alter, Damian Mrowca, Martin Schrimpf, James Traer, Julian De Freitas, Jonas Kubilius, Abhishek Bhandwaldar, Nick Haber, Megumi Sano, Kuno Kim, Elias Wang, Michael Lingelbach, Aidan Curtis, Kevin Feigelis, Daniel M. Bear, Dan Gutfreund, David Cox, Antonio Torralba, James J. DiCarlo, Joshua B. Tenenbaum, Josh H. McDermott and Daniel L.K. Yamins

We introduce ThreeDWorld (TDW), a platform for interactive multi-modal physical simulation. TDW enables simulation of high-fidelity sensory data and physical interactions between mobile agents and objects in rich 3D environments. Unique properties include: real-time... View Details

Keywords: Artificial Intelligence; Platform; Interactive Physical Simulation; Virtual Environment; Multi-modal; AI and Machine Learning

October 2021
Article

Can Self-Regulation Save Digital Platforms?

By: Michael A. Cusumano, Annabelle Gawer and David B. Yoffie

This article explores some of the critical challenges facing self-regulation and the regulatory environment for digital platforms. We examine several historical examples of firms and industries that attempted self-regulation before the Internet. All dealt with similar... View Details

Keywords: Self-regulation; Government Regulation; Digital Platforms; Governing Rules, Regulations, and Reforms

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June 2021
Case

Mobileye 2021: Robotaxi and/or Consumer AV?

By: David B. Yoffie, Danielle Golan and Nicole Tempest Keller

In March 2021, Amnon Shashua, co-founder and CEO of Israel-based Mobileye, was preparing to meet with Intel’s new CEO, Pat Gelsinger, to review plans for the future. Mobileye had been acquired by California-based Intel in 2017, but still operated independently.... View Details

Keywords: Technology Companies; Robotics; Autonomous Vehicles; Strategy; Decision Making; Transportation; Technological Innovation; Technology Industry; Auto Industry; Transportation Industry; Israel

Article

A Megastudy of Text-Based Nudges Encouraging Patients to Get Vaccinated at an Upcoming Doctor's Appointment

By: Katherine L. Milkman, Mitesh S. Patel, Linnea Gandhi, Heather N. Graci, Dena M. Gromet, Hung Ho, Joseph S. Kay, Timothy W. Lee, Modupe Akinola, John Beshears, Jonathan E. Bogard, Alison Buttenheim, Christopher F. Chabris, Gretchen B. Chapman, James J. Choi, Hengchen Dai, Craig R. Fox, Amir Goren, Matthew D. Hilchey, Jillian Hmurovic, Leslie K. John, Dean Karlan, Melanie Kim, David Laibson, Cait Lamberton, Brigitte C. Madrian, Michelle N. Meyer, Maria Modanu, Jimin Nam, Todd Rogers, Renante Rondina, Silvia Saccardo, Maheen Shermohammed, Dilip Soman, Jehan Sparks, Caleb Warren, Megan Weber, Ron Berman, Chalanda N. Evans, Christopher K. Snider, Eli Tsukayama, Christophe Van den Bulte, Kevin G. Volpp and Angela L. Duckworth

Many Americans fail to get life-saving vaccines each year, and the availability of a vaccine for COVID-19 makes the challenge of encouraging vaccination more urgent than ever. We present a large field experiment (N = 47,306) testing 19 nudges delivered to patients via... View Details

Keywords: Vaccination; COVID-19; Nudge; Influenza; Field Experiment; Health; Communication Strategy; Behavior

May 2021
Case

Roku 2021

By: David B. Yoffie and Daniel Fisher

This case is used to explore the strategic concept of "look forward, reason back." Roku in 2021 is trying to figure out the future of television and streaming media. Students are asked to provide a vision for television and streaming media (that is, Look Forward) by... View Details

Keywords: Television Entertainment; Forecasting and Prediction; Decision Choices and Conditions; Strategy; Strategic Planning; Media and Broadcasting Industry

April 2021
Teaching Note

Social Media War 2021: Snap vs. Facebook vs. TikTok

By: David B. Yoffie and Daniel Fisher

This teaching note provides analysis and a teaching plan for the Social Media War 2021: Snap vs. Facebook vs. TikTok case. View Details

Keywords: Strategy Development; Competitor Analysis; Strategy; Network Effects; Competitive Strategy; Decision Choices and Conditions; Social Media

April 2021 (Revised March 2024)
Case

Social Media War 2021: Snap vs. Facebook vs. TikTok

By: David B. Yoffie and Daniel Fisher

This case explores the competitive war between Snap, Facebook, and TikTok in 2021. The strategic focus is on Snapchat: how should it respond to the emergence of TikTok, and how should it compete with the dominant competitor in its space—Facebook. The case examines... View Details

Keywords: Strategy Development; Competitor Analysis; Strategy; Network Effects; Competitive Strategy; Decision Choices and Conditions; Social Media

January 15, 2021
Article

Social Media Companies Should Self-Regulate. Now

By: Michael A. Cusumano, Annabelle Gawer and David B. Yoffie

We argue that social media firms should ramp up self-regulation of content in 2021. This argument is based on research on numerous industries where firms and/or industry associations devised self-regulatory strategies that successfully limited or forestalled more... View Details

Keywords: Self-regulation; Internet and the Web; Governing Rules, Regulations, and Reforms; Business and Government Relations; Social Media