KERRY PATTERSON is Professor of Econometrics at the University of Reading. He has established an international reputation in econometrics and has published over 50 articles in leading journals, including the Journal of the Royal Statistical Society, the Review of Economics and Statistics, the Economic Journal and the International Journal of Forecasting. He is author of A Primer for Unit Root Testing and co-editor, with Terence Mills, of the Palgrave Handbook of Econometrics, both published by Palgrave.