David Krackhardt is Professor of Organizations at the Carnegie Mellon University's Heinz College of Information Systems and Public Policy, with a joint appointment at the Tepper School of Business. Over the past 15 years, his research has focused on how the theoretical insights and methodological innovations of network analysis can enhance our understanding of how organizations function. He pioneered the concept of "cognitive social structures", wherein individuals provide their perceptions of the entire network in which they are embedded. He empirically has related these perceived structures to turnover, reputations and power in organizations. Another interest of his has been in developing methodologies for better understanding networks and their implications. His contributions in thi...