BA, University of York, UK; Master's in Mathematical Economics and Econometrics, and PhD, London School of Economics. Formerly, Lecturer, London School of Economics. With MIT: 1993, Member of Faculty; 2000, current position. Editor, Review of Economics and Statistics. Associate Editor, Journal of Economic Growth. Member, Economic Growth Program, Canadian Institute of Advanced Research. Affiliate: National Bureau of Economic Research, Center for Economic Performance; Center for Economic Policy Research. Recipient of several awards including John Bates Clark Medal (2005).