This report reviews evidence on the impact of migration into Scotland since 2004, when the accession of the A8 countries - Poland, Lithuania, Estonia, Latvia, Czech Republic, Slovakia, Hungary and Slovenia - to the European Union resulted in increased migration into the UK. The review includes available evidence in relation to other groups, including asylum seekers and refugees. The review uses evidence from a range of published and unpublished sources, including datasets, surveys and qualitative studies, across the two main areas of economic and employment impacts and social impacts.