DAVID DRANOVE is the Walter McNerney Distinguished Professor of Health Industry Management and Professor of Management and Strategy at the Kellogg Graduate School of Management. He is also the former chair of the Department of Management and Strategy at the Kellogg School. Widely published in a number of business journals, he is also the coauthor of Economics of Strategy, from Wiley.SONIA MARCIANO is Institute Fellow and Senior Lecturer at The Institute for Strategy and Competitiveness at the Harvard Business School. Previously, she was Clinical Professor of Management and Strategy at the Kellogg School and Adjunct Professor of Strategy at The University of Chicago.