Affiliation: | 1. Department of Economics, Business and Statistics, Università degli Studi di Milano, Via Conservatorio 7-20122 Milan, Italy;2. Econpubblica, Italy;3. Department of Economics and Related Studies, and Centre for Health Economics, University of York, Heslington, York, YO10 5DD, UK;4. Centre for Economic Policy and Research (C.E.P.R.), 90-98 Goswell Street, London EC1V 7DB, UK |