1. Aldin, V. , James, D. and Wadsworth, J. , 2010. The Changing Shares of Migrant Labour in Different Sectors and Occupations in the UK Economy: An overview. In: M. Ruhs and B. Anderson , eds. 2010. Who Needs Migrant Workers? Labour shortages, immigration and public policy. Oxford: Oxford University Press. pp. 57–85.