is Professor of Macroeconomics at Cambridge University, Fellow of Clare College and Director of the Cambridge INET Institute. He is a leading scholar in international economics and open macro with pioneering contributions on currency, financial and sovereign
crises, monetary and fiscal policy in open economy. His work has appeared in numerous journals including the American Economic Review, the Journal of European Economic Association.  He has been a long-serving co-editor of the Journal of International Economics. He is a consultant at the European Central Bank and the Bank of England and is also a research fellow of the Centre for Economic Policy Research.