1. University of Iceland Postdoctoral Researcher in the Faculty of Political Science, , Sæmundargata 2, 102 Reykjavík, Iceland
2. University of Manchester Postgraduate Research Student in the Social Statistics Department, , Humanities Bridgeford Street, Manchester M13 9PL, UK
3. University of Manchester Associate Professor in the Social Statistics Department, , Humanities Bridgeford Street, Manchester M13 9PL, UK
4. University of Manchester Professor in the Social Statistics Department, , Humanities Bridgeford Street, Manchester M13 9PL, UK