This book presents the results of the MIDA-project - the impact of labour migra-tion from the Central and Eastern European (CEE) countries to the Danish labour market. In addition, it includes chapters that focus on labour mobility in other EU countries. The project stems from collaboration between researchers from the former CoMID (the Research Center for the Study of Migration and Diversity) at Aalborg University and the Department of Occupational Medicine at the Regional Hospital West Jutland.