1 Dondena Research Centre and Department of Policy Analysis and Public Management, Bocconi University Via Roberto Sarfatti, 25, 20100, Milan, Italy.
2 US Right to Know, 4096 Piedmont Avenue #963, Oakland, CA, 94611-5221, USA.
3 Department of Public Health and Policy, London School of Hygiene & Tropical Medicine, 15-17 Tavistock Place, London, WC1H 9SH, UK. Martin.McKee@lshtm.ac.uk.