The economic effects of constitutions, MIT Press, Munich Lectures in Economics, 2003 (with T. Persson)
Political economics – Explaining economic policy, MIT Press, 2000 (with T. Persson)
Monetary and fiscal policy. Volume I: Credibility, Volume II: Politics, edited jointly with T. Persson, MIT Press, 1994
Macroeconomics, credibility and politics, Harwood Academic Publishers, London, 1990 (with T. Persson). (Italian Translation: Politica macroeconomica: le nuove teorie, La Nuova Italia Scientifica, Roma 1996)