Nicole Bolleyer is a Professor of Comparative Politics at the University of Exeter. Her publications include New Parties in Old Party Systems: Persistence and Decline in 17 Democracies (OUP, 2013) and Intergovernmental Cooperation: Rational Choices in Federal Systems and Beyond (OUP, 2009), and she has published in numerous journals such as Comparative Political Studies, Journal of Politics, European Journal of Political Research, Governance, Political Studies, Party Politics, and the European Political Science Review.