I am an Associate Professor in the Gatton College of Business and Economics, and a board member of LINKS, a center for research on social networks (www.linkscenter.org).  My research focuses on the effects of demography and personality on social networks, leadership, and performance in organizations.   Current projects include a network simulation that focuses on the system-level performance consequences of altruistic behavior, and a longitudinal study of co-authorship and citation networks in organizational studies. My work has been published in such journals as Administrative Science Quarterly (ASQ) and Academy of Management Review (AMR), and it has received coverage in a number of newspapers, such as the European Wall Street Journal, the Chicago Tribune, and the Los Angeles Times. I have served on the editorial board of AMR (2003-2008); I currently serve on the editorial board of ASQ. I received my Ph.D., in 1998, from Penn State's Smeal College of Business. (In addition to my research and teaching, I am passionate about dogs, chess, and rock-climbing.)