This article was originally published with an incorrect author affiliation. The affiliation of Filip Kostelka was given as Department of Political and Social Sciences, European University, Italy and Institute and Department of Government, University of Essex, United Kingdom. This should have read Department of Political and Social Sciences, European University Institute, Italy and Department of Government, University of Essex, United Kingdom.
This has now been corrected and the online PDF and HTML versions updated. The publisher apologises for this error.