1. Department of Communication, Cornell University, Ithaca, New York 14850;
2. Desautels Faculty of Management, McGill University, Montreal, Quebec H3A 0G4, Canada;
3. Department of Management Science & Engineering, Stanford University, Stanford, California 94305;
4. Technology Management Program, University of California, Santa Barbara, Santa Barbara, California 93106;
5. Department of Management, Technology, and Economics, ETH Zürich, 8092 Zürich, Switzerland