Karl Claxton is a Professor in the Department of Economics and the Centre for Health Economics at the University of York. He leads the economic evaluation component of the Health Economics MSc at the University of York. He is a past co-editor of the Journal of Health Economics and for many years held an adjunct appointment at the Harvard School of Public Health. He is author of two OUP textbooks on economic evaluation and decision modelling. He was a founding member of the NICE Technology Appraisal Committee and has represented the committee at a number of appeals and was an expert witness for the Institute during judicial review. He is also a member of the National Decision Support Unit and continues to contribute to the development of the NICE Guide to the Methods of Technology Appraisal through the NICE Methodology Working Party.  He has contributed in a number of ways to recent policy debates such as pharmaceutical pricing and innovation, including as an expert witness at the House of Common Health Select Committee and the Kennedy review of Innovation in Health Technology.  A well as NICE he has also advised, Department of Health, HM Treasury, Department of Innovation and Skills and Office of Life Sciences.