Keith Warren’s research focuses on the interactions between clients in social work settings such as group homes, self-help groups and therapeutic communities for substance abuse, and the way in which interactions predict outcomes. Many of these settings assume that individuals will help each other through a process of mutual aid, yet we know very little about the actual way in which individuals cooperate or fail to do so in group clinical settings. Keith’s research has drawn extensively on models of cooperation and competition developed in evolutionary ecology and economics as well as social network theory and social network analysis. Prior to coming to Ohio State, he was a postdoctoral fellow in social work at the University of Wisconsin-Madison, and received his Ph.D. and MSW at the University of Texas at Austin.