Title: A ‘Natural Experiment’ Approach to Investigating Scope Sensitivity in Values for Risk Reductions: Private and Public UV Health Risk Reduction Strategies in Low and High Risk Countries Authors: Ian J. Bateman 1,2 , Roy Brouwer 1,3 , Stavros Georgiou 1 , Nick Hanley 4 , Fernando Machado 5 , Susana Mourato 6 , Caroline Saunders 7 Affiliations: 1 Centre for Social and Economic Research on the Global Environment (CSERGE), University of East Anglia, Norwich, UK. 2 Centre for Environmental Decision Making and Centre for Economic and Behavioural Analysis of Risk and Decision (CEBARD), University of East Anglia, Norwich, UK. 3 Corresponding author. Current address: National Institute for Integrated Inland Water Management and Wastewater Treatment (RIZA), National Water Policy Division, PO Box 17, 8200 AA, Lelystad, the Netherlands. E-mail: r.brouwer@riza.rws.minvenw.nl. 4 Dept. of Economics, University of Glasgow, Glasgow, UK. 5 Faculdade de Ciências, Economicas e Empresaríais, Universidade Católica Portuguesa, Lisbon, Portugal. 6 Department of Environmental Science and Technology, Imperial College of Science, Technology and Medicine, London, UK. 7 Commerce Division, Lincoln University, Canterbury, New Zealand. Acknowledgements CSERGE is funded by the UK Economic and social Research Council (ESRC). Further funding was provided by the authors’ host institutions for which we are grateful. The authors also wish to thank the team of interviewers who collected data in the countries surveyed as part of this research. 1