- Quondam Fellow, All Souls College (from 2010)
- Professor of Economics, University of Oxford and Fellow of All Souls (from 2009 to 2010)
- Professor and Canada Research Chair, University of British Columbia and Fellow, Bank of Canada.
Also Faculty Research Fellow (1994-2003), then Research Associate (2003–9), National Bureau of Economic Research, Boston (from 1994 to 2009)
- Scholar (1996–9), then Associate Researcher, Canadian Institute for Advanced Research (from 1996 to 2002)
- Associate Researcher, Centre de Recherche et Développement en Economique, Université de Montréal (from 1989 to 2002)
- Postgraduate, Princeton University (from 1984 to 1989)
- Postgraduate, University of British Columbia (from 1983 to 1984)
- Undergraduate, Université Laval (from 1980 to 1983)
- Macroeconomics
- Monetary economics
- Technical change and growth
- Labour economics
- Income inequality
- (with Patrick Francois), ‘Organizational Skill and Management in the Theory of Economic Growth’, Review of Economic Studies (forthcoming)
- (with Charles Blackorby and Deszo Salay), ‘Taxes and Employment Subsidies in Optimal Redistribution Programs’, American Economic Review (March 2009)
- (with Franck Portier), ‘When can Changes in Expectations cause Business Cycle Fluctuations’, Journal of Economic Theory (2007)
- (with Franck Portier ), ‘News, Stock Prices and Economic Fluctuations’, American Economic Review (September 2006)
- (with Fabrice Collard), ‘Globalization, Returns to Accumulation, and the World Distribution of Income’ Journal of Monetary Economics (2006)
- (with David Green), ‘The Changing Structure of Wages in the US and Germany: What explains the differences?’ American Economic Review (June 2003)
- Visiting Professor and Researcher, MIT (2004)
- Visiting Professor and Researcher, Université de Montréal (from 2002 to 2003)
- Visiting Professor and Researcher, GREMAQ, Toulouse, France (from 2000 to 2001)
- Visiting Professor and Researcher, MAD, Paris I-Sorbonne, France (1997)
- Visiting Assistant Professor, University of British Columbia (from 1992 to 1993)
- Consultant, Economic Development Institute, World Bank (from 1988 to 1989)
- Consultant, Research Department, National Bank of Canada (1987)
- Visiting Researcher, Université Laval (1985)
- 2008 John Rae Research Prize for best economic research in Canada over the last 5 years.