Morten T. Hansen is the author of the forthcoming book Great at Work. Drawing on an original study of 5,000 managers and employees, it shows how top performers work less and achieve more, and by so doing provides a new theory of professional productivity. The Norwegian Hansen is also the co-author of Great by Choice (with Jim Collins, 2011) and author of Collaboration (2009). Hansen is a management professor at University of California, Berkeley, and was previously a professor at INSEAD and Harvard Business School. He was also a management consultant at the Boston Consulting Group.