Acknowledgements
The Scottish Government would like to thank Neil Odam, ESRC PhD Student (supported by Kenneth Humphreys, Scottish Government), for all his efforts in the analysis of the data and drafting of this report. This was made possible through the Economic and Social Research Council ( ESRC)/Scottish Government Internship Scheme which enables ESRC PhD students in their second or third year of study to work for three months with the Scottish Government on short term projects.