Professor Chapman studies international organizations, conflict, and cooperation. In 2009-2010 he held a position as a visiting associate research scholar at the Niehaus Center for Globalization and Governance at Princeton University. His work on international security organizations, the UN Security Council, political violence, and the International Criminal Court has appeared or is forthcoming in International Organization, the Journal of Politics, the Journal of Conflict Resolution, and International Studies Quarterly. His book, Securing Approval: Domestic Politics and Multilateral Authorization for War, was published by the University of Chicago Press in 2011. He received his Ph.D. in 2007 from Emory University.
Currently, Dr. Chapman is working on several projects. The first examines the fiscal origins of military spending and international diplomacy, building on theories of bargaining and war. The second examines market reactions to IMF program announcements, or the so-called "catalytic" lending effect.