Peter John is Professor of Political Science and Public Policy, University College London, UK.
Anthony Bertelli holds the C.C. Crawford Chair in Management and Performance, School of Policy, Planning and Development and the USC Gould School of Law, University of South Carolina, USA.
Will Jennings is Reader in Politics, University of Southampton.
Shaun Bevan is Research Fellow at the Mannheim Centre for European Social Research (MZES), University of Mannheim, Germany.