- Professor Emeritus at the University of Manchester (2020- ....)
- Chair in Econometrics at the University of Manchester (1995-2019)
- Lectureships in Econometrics at the Universities of Nottingham (1987-89) and York (1989-95)
- Fixed Term Lectureships at the Universities of Hull (1984-85) and York (1985-87)
At Manchester he was Research Director in Economics (1997-2000), Research Dean in the Faculty of Social Sciences and Law (2000-2004), Head of Economics (2004-2007 & 2011-13), School of Social Sciences Research Director (2011-13) and Head of the School of Social Sciences for 5 years (2013-2018). For 20 years (1997-2017) he was Managing Editor of The Manchester School journal.
He was a member of the ESRC Strategic Research Board (2005-2009); Advisory Panel Chair, World Economy and Finance Programme (2006-2010); and, Advisory Panel Member, CeMMAP (2008-2016).
His principal area of research was econometric misspecification theory and testing, although his collaborative work addresses issues in labour economics, and he has published widely in the leading economics, econometrics and statistics journals (Econometrica, Journal of Econometrics, Econometric Theory, Econometrics Journal, Econometrics Review, International Economic Review, Biometrika, Economic Journal, Journal of Applied Econometrics).