2008: “How Can Governments Be Accountable if Voters Vote Ideologically?” In José María Maravall & Ignacio Sánchez-Cuenca (eds.) Voters, Institutions and Accountability, pp.45-81. Cambridge: Cambridge University Press.

2007: “A Behavioral Critique of Searle’s Theory of Institutions”, in S. L. Tsohatzidis (ed.) Intentional Acts and Institutional Facts. Essays on John Searle’s Social Ontology, pp.175-89. Dordrecht: Springer.

2005: (Co-author: Stathis Kalyvas) “Killing Without Dying: The Absence of Suicide Missions”, pp.209-232. En Diego Gambetta (ed.) Making Sense of Suicide Missions. Oxford: Oxford University Press.2003 : “Power, Rules and Compliance”. En Adam Przeworski y José María Maravall (eds.) Democracy and the rule of law, pp.62-93. Cambridge: Cambridge University Press.