My research focuses on the development of norms governing democratic decision-making, especially those rules that generate and constrain the power of democratic bodies to legislate. I have a particular interest in ancient Athenian institutions. My first book, Democracy and Legal Change (Cambridge University Press, 2007; paperback edition, 2009) examines amendment clauses and unamendable provisions. My second book, Counting the Many: The Origins and Limits of Supermajority Rule (Cambridge University Press, 2014) explains and critically assesses the use of supermajority rules both within and outside of the constitutional context.

I am beginning to conduct research on the democratic pedigree of decision-making on juries as part of an inquiry into epistemic democracy, and on the normative foundations of bargaining.

Please feel free to contact me for draft chapters or working papers.