David J. Collis is a professor in the strategy unit at the Harvard Business School, where he teaches the MBA and in Executive Education programs. He is an expert on corporate strategy and global competition, and is the author of the recent books Corporate Strategy and Corporate Headquarters. His work has been frequently published in the Harvard Business Review, Academy of Management Journal, Strategic Management Journal, European Management Journal, and in many books, including Managing the Multibusiness Company, International Competitiveness, and Beyond Free Trade.