The EU Single Market remains fragmented by complex and heterogeneous rules at the EU and national levels affecting trade, capital, including foreign direct investment, and labour mobility. Further development of the Single Market and removing barriers to external trade would bring substantial...

We use a quantitative model to study the implications of European integration for welfare and migration flows across 1,318 regions. The model suggests that an increase of trade barriers to the level of 1957 reduces welfare by about 1-2 percent on average, depending on the presumed trade...