Wouter van der Brug is professor of politics at the University of Amsterdam, the Netherlands. His research focuses on right-wing populist parties, party systems, elections and campaigns, support for European integration, and political trust. He publishes frequently on these topics in various peer-reviewed journals, and recently co-authored The Economy and the Vote (with van der Eijk and Franklin).

Cees van der Eijk is professor of social science research methods at the University of Nottingham, UK. His research focuses on social science methodology, and on comparative political behavior and processes. He is the author or co-author of fifteen books and numerous articles and chapters in international journals and books. He has been a principal investigator of the European Election Studies project since 1987.