[Capítulo en Inglés / Chapter in English] David Krackhardt is a Professor of Organizations at Carnegie Mellon University's Heinz College of Information Systems and Public Policy, with a joint appointment at the Tepper School of Business. His current research agenda includes developing models of diffusion of controversial innovations, exploring and testing visual representations of networks, identifying effective leverage points for organizational change, and exploring the roles of Simmelian (super-strong) ties in organizations. Prior to joining Carnegie Mellon University, Dr. Krackhardt's appointments included faculty positions at Cornell's Graduate School of Management, the University of Chicago's Graduate School of Business, INSEAD (France) and the Harvard Business School. He received a BS degree from the Massachusetts Institute of Technology and a PhD from the University of California, Irvine. You can read more about his research in Google Scholar, or on his profile's websites (…