Alessandro Nai is Lecturer in empirical methods at the Department of Political Science and International Relations at the University of Geneva (Switzerland). His work deals with citizens' behaviour in referenda and elections, political psychology, and campaigning effects. He is currently co-directing a three-year SNSF research project (2012-2015) on negative campaigning in Switzerland, with a special focus on its causes and effects. He has been a visiting fellow at the Rutgers University, USA (2008-2009) and at the University of Sydney, Australia (2014). Recent journal articles include ‘What really matters is which camp goes dirty: differential effects of negative campaigning on turnout during Swiss federal ballots’ (European Journal of Political Research, 2013) and ‘The Cadillac, the mother-in-law, and the ballot: individual and contextual roots of ambivalence in Swiss direct democracy’ (Electoral Studies, 2014).