My research focuses on conflict and cooperation within and between groups and teams. I often use experimental games to study how individuals, groups and teams make decisions and negotiate. Here are some of the the research questions that I find interesting: (1) How does intragroup conflict affect team performance? (2) How does hierarchy within teams affect intragroup cooperation and team performance? (3) How do people form mental representations of conflict situations? (4) What motivates individual participation in intergroup conflict?