ผู้เขียน: J. Twyman

Harold Clarke is Ashbel Smith Professor, School of Economic, Political and Policy Sciences, at the University of Texas at Dallas, USA.Peter Kellner is President of You Gov plc, UK. Joe Twyman is Head of Social and Political Research, You Gov plc, UK.Marianne Stewart is Professor, School of Economic, Political and Policy Sciences, at the University of Texas at Dallas, USA.Paul Whiteley is Professor of Government at the University of Essex, UK.