"NATO is a Global Organization in All but Name," Yale Journal of International Affairs, Vol. 8, No.2, 2013.
"How NATO Endures: An Institutional Analysis," doctoral dissertation, Oxford University, 2012.
"The Human Dimension of 'Smart Defence'." with Andrea B. Baumann. RealClearWorld, 3 April 2012.
"Resourcing America's Security Cooperation." Yale Journal of International Affairs, Vol. 6, No. 2, 2011.
"Are Democracies Aggressive? Is the United States Aggressive?" with Dan Reiter, John Schuessler, and Richard Ned Lebow. St. Antony's International Review, Vol. 7, No. 1, 2011.
"Safeguarding the Freedom, Common Heritage, and Civilization of the Peoples: President Truman and the North Atlantic Treaty." A Dialogue on the Presidency with a New Generation of Leaders (Robert E. Henderson, editor). Washington, DC: Center for the Study of the Presidency and Congress, 2003. (Donald B. Marron Award for the Best Historical Analysis of the Presidency)