The enlargement of the European Union in May 2004 triggered a relatively large and rapid migration inflow into Wales which was concentrated into narrow areas and occupations. As this inflow was larger and faster than anticipated, it arguably corresponds more closely to an exogenous supply shock...

The UK was one of only three countries that granted free movement of workers to accession nationals following the enlargement of the European Union in May 2004. The resulting large, rapid and concentrated migration inflow can be seen as a natural experiment that arguably corresponds closely to...