He was Fulbright Professor at the Department of History, University of Pittsburgh (PA) in 2011, and a Visiting Fellow at the Italian Academy for Advanced Studies in America at Columbia University in 1997-98. He taught at the University of Bologna and at the SISSA in Trieste. His research interests mainly concern the long-term evolution of the American political system and the relationship between capitalism and political systems, as well as political communication. He collaborates with il manifesto, Alfabeta2 and Il BoLive, the daily newspaper of the University of Padua.