Cristobal Rovira Kaltwasser, Associate Professor of Political Science, Diego Portales University, Santiago, Chile,Paul A. Taggart, Professor of Politics and Jean Monnet Chair, University of Sussex,Paulina Ochoa Espejo, Associate Professor of Political Science, Haverford College,Pierre Ostiguy, Assistand Professor of Political Studies, Universidad Catolica de Chile

Cristobal Rovira Kaltwasser is an Associate Professor of Political Science at Diego Portales University in Santiago de Chile. His publications include Populism: A Very Short Introduction (with Cas Mudde, OUP, 2017), and has published articles in journals such as Comparative European Politics, Democratization, Government & Opposition, Latin American Research Review and Political Studies.

Paul Taggart is Professor of Politics and Jean Monnet Chair, Director of the Sussex European Institute, former editor of Government and Opposition, former editor of the journal Politics, co-convenor (with Prof. Aleks Szczerbiak) of the European Referendums, Elections and Parties Network (EPERN). His publications include The New Populism and the New Politics (Palgrace, 1996) and Opposing Europe? The Comparative Party Politics of Euroscepticism, Vols I and II (co-edited with Aleks Szczerbiak, OUP, 2008).

Paulina Ochoa Espejo is an Associate Professor of political science at Haverford College. Her publications include The Time of Popular Sovereignty: Process and the Democratic State (Penn State University Press, 2011) and has publsihed articles in journals such as the American Journal of Political Science, the Journal of Political Philosophy and the Journal of Politics.

Pierre Ostiguy is an Assistant Professor of Political Studies at the Universidad Catolica de Chile. His publications include the forthcoming work Party Systems and Political Appeals: Populism and Anti-Populism in Argentina (University of Notre Dame Press, 2017).