"The enlargement of the European Union (EU) has increased the importance of the issue of migration. The discussion up to now has been focused mainly on migration from central and eastern European countries to western European ones; much less attention has been given to the impact of migration on the economic development of sending countries as well as immigration in them. This paper aims to contribute to a more balanced view of migration regarding both sides of the debate. The article analyses labour migration from and in central and eastern European countries over the last twenty years and discusses the participation and integration of such migrants in the EU labour market. The main hypothesis of the article is that the differentiated labour inflows of immigrants in the two EU regions (western and eastern EU member countries) could have asymmetric impacts on the quality of the labour force (human capital) as well as on economic development, depending on the extent of the substitution and complementarity effects among groups of natives and foreign- born workers "

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