Accounting for differences in labour market outcomes in Great Britain: a regional analysis using the labour force survey / Nigel O'Leary, University of Wales Swansea, Philip D. Murphy, University of Wales Swansea, Paul Latreille, University of Wales Swansea, David H. Blackaby, University of Wales Swansea, Peter J. Sloane, University of Wales Swansea and IZA Bonn