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- All HBS Web (685)
- Faculty Publications (380)
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- April 2024
- Case
ChatGPT Enters the Voice Wars 2024
By: David B. Yoffie and Sarah von Bargen
OpenAI joined the Voice Wars in September 2023 when it launched its voice feature for ChatGPT. Initially only available to Pro subscribers, ChatGPT gave free access to all users two months later. It formed partnerships with a variety of companies, including carmakers,... View Details
Keywords: AI and Machine Learning; Partners and Partnerships; Lawsuits and Litigation; Technology Adoption; Market Entry and Exit; Technology Industry
Yoffie, David B., and Sarah von Bargen. "ChatGPT Enters the Voice Wars 2024." Harvard Business School Case 724-481, April 2024.
- October 1987 (Revised April 1991)
- Supplement
Motorola and Japan (A), Supplement
By: David B. Yoffie and John J. Coleman
Updates Motorola and Japan (A) for 1982. View Details
Yoffie, David B., and John J. Coleman. "Motorola and Japan (A), Supplement." Harvard Business School Supplement 388-057, October 1987. (Revised April 1991.)
- October 1987 (Revised February 1992)
- Case
Motorola and Japan (A)
By: David B. Yoffie and John J. Coleman
In 1981, Motorola was reevaluating its strategy towards Japan. The firm had been successful in penetrating the Japanese market, and it was confronting increased Japanese competition at home. How it should respond and with what kind of organization were the central... View Details
Keywords: Market Entry and Exit; Standards; Competition; Corporate Strategy; Telecommunications Industry; Japan
Yoffie, David B., and John J. Coleman. "Motorola and Japan (A)." Harvard Business School Case 388-056, October 1987. (Revised February 1992.)
- June 1987 (Revised March 1991)
- Case
Semiconductor Industry Association and the Trade Dispute with Japan (A), The
By: David B. Yoffie and John J. Coleman
Yoffie, David B., and John J. Coleman. "Semiconductor Industry Association and the Trade Dispute with Japan (A), The." Harvard Business School Case 387-205, June 1987. (Revised March 1991.)
- June 1987 (Revised February 1989)
- Supplement
Semiconductor Industry Association and the Trade Dispute with Japan, The: Harris Corp. Profile, Supplement
By: David B. Yoffie and John J. Coleman
Yoffie, David B., and John J. Coleman. "Semiconductor Industry Association and the Trade Dispute with Japan, The: Harris Corp. Profile, Supplement." Harvard Business School Supplement 387-194, June 1987. (Revised February 1989.)
- October 1986 (Revised March 1989)
- Case
North American Telecom International
By: David B. Yoffie and John J. Coleman
Keywords: Telecommunications Industry
Yoffie, David B., and John J. Coleman. "North American Telecom International." Harvard Business School Case 387-021, October 1986. (Revised March 1989.)
- April 2018
- Supplement
$19B 4 txt app WhatsApp...omg! (B)
By: David B. Yoffie and Aakash Mehta
This case provides a brief update on Facebook's acquisition of WhatsApp. View Details
Yoffie, David B., and Aakash Mehta. "$19B 4 txt app WhatsApp...omg! (B)." Harvard Business School Supplement 718-513, April 2018.
- January 2009 (Revised February 2010)
- Case
Gucci Group in 2009
By: David B. Yoffie and Renee Kim
The Gucci Group had transformed itself into the world's third largest luxury retailer with multiple brands. The company had performed well even after the departure of star designer Tom Ford and former CEO Domenico De Sole. However, the challenging global economic times... View Details
Keywords: Financial Crisis; Brands and Branding; Organizational Change and Adaptation; Luxury; Corporate Strategy; Apparel and Accessories Industry; Retail Industry
Yoffie, David B., and Renee Kim. "Gucci Group in 2009." Harvard Business School Case 709-459, January 2009. (Revised February 2010.)
- November 2008 (Revised April 2009)
- Case
E Ink in 2008
By: David B. Yoffie and Renee Kim
In the fall of 2008, E Ink had positioned itself as a leader in electronic ink technology thanks to the launch of several eBook devices such as Amazon's Kindle. Yet E Ink still faced the question of how to turn its technology into a profitable business amid competing... View Details
Keywords: Entrepreneurship; Profit; Product Positioning; Business Strategy; Competition; Hardware; Technology Industry
Yoffie, David B., and Renee Kim. "E Ink in 2008." Harvard Business School Case 709-443, November 2008. (Revised April 2009.)
- January 2008
- Teaching Note
TiVo 2007: DVRs and Beyond (TN)
By: David B. Yoffie and Michael Slind
Teaching Note for [708401]. View Details
- May 2006
- Teaching Note
Wintel (TN) (A), (B), (C), (D), (E), and (F)
Teaching Note for 704-419, 704-420, 704-421, 704-422, 704-423, and 705-413. View Details
- June 2005 (Revised March 2006)
- Case
E Ink in 2005
By: David B. Yoffie and Barbara Mack
Explores the challenges of commercializing a bleeding-edge technology. After seven years, E Ink has spent more than $100 million to commercialize electronic ink. With business momentum picking up, but resources running out, the case examines the key trade-offs in... View Details
Keywords: Technological Innovation; Commercialization; Mathematical Methods; Consumer Products Industry; Technology Industry
Yoffie, David B., and Barbara Mack. "E Ink in 2005." Harvard Business School Case 705-506, June 2005. (Revised March 2006.)
- January 2005 (Revised April 2005)
- Case
Wal-Mart, 2005
By: David B. Yoffie and Barbara Mack
Wal-Mart has been expanding, both domestically and internationally. Covers recent developments at Wal-Mart, including new stores, new store formats, and international expansion. View Details
Keywords: Globalized Firms and Management; Competition; Expansion; Innovation and Invention; Retail Industry; United States
Yoffie, David B., and Barbara Mack. "Wal-Mart, 2005." Harvard Business School Case 705-460, January 2005. (Revised April 2005.)
- October 2004 (Revised December 2004)
- Case
Nokia Update 2004
By: David B. Yoffie and Barbara Mack
Updates students on Nokia's performance. View Details
- December 2002
- Teaching Note
AOL Europe vs. Freeserve (A,B, and C) (TN)
By: David B. Yoffie and Mary Kwak
Teaching Note for (9-703-409), (9-703-410), and (9-703-411). View Details
- September 2006
- Article
With Friends Like These: The Art of Managing Complementors
By: David B. Yoffie and Mary Kwak
Keywords: Management
Yoffie, David B., and Mary Kwak. "With Friends Like These: The Art of Managing Complementors." Harvard Business Review 84, no. 9 (September 2006).
- 2005
- Working Paper
Wintel: Cooperation or Conflict
We study the incentives of complementors (producers of complementary products) to cooperate vs. compete and how these interact. In a system of complements, like the PC, the value of the final product depends on how well the different components work together. This, in... View Details
Keywords: Investment; Price; Time Management; Product; Product Development; Research and Development; Conflict and Resolution; Motivation and Incentives; Value
Casadesus-Masanell, Ramon, and David B. Yoffie. "Wintel: Cooperation or Conflict." Harvard Business School Working Paper, No. 05-083, July 2005.
- fall 2001
- Article
Mastering Strategic Movement at Palm
By: David B. Yoffie and Mary Kwak
Keywords: Strategy
Yoffie, David B., and Mary Kwak. "Mastering Strategic Movement at Palm." MIT Sloan Management Review 43, no. 1 (fall 2001): 55–63. (Reprint 4315.)
- March 1985
- Teaching Note