TERRY BARKER is Senior Department Fellow in 4CMR, Chairman of Cambridge Econometrics and Honorary Proffessor, School of Environmental Sciences, University of East Anglia. He is also the Founder of the Cambridge Trust fror New Thinking in Economics. He was a Co-ordinating Lead Author for the IPCC’s Third and Fourth Assessment Reports 2001 and 2007, taking responsibility for chapters on cross-sectoral greenhouse gas mitigation. He is an applied economist with over 100 papers published mainly on the topics of economic modelling, international trade, and climate change mitigation. He has over 30 years of experience in building economic models for national economies, including models for Botswana and Mexico. His research interests are in developing large-scale models designed to address the issue of global decarbonisation at the UK, European and global scales.