ABSTRACT
Despite the recent economic and financial crisis, global migration continues to rise. The estimated stock of international migrants amounts to more 230 million in 2013 according to figures of the United Nations (2013). Since the early 1990 the number of migrants worldwide increased by around 50 per cent. At present migrants represent about 3 per cent of total global population. Immigration becomes more important, especially in the ageing European economies that will experience a pronounced decline of the labour force due to demographic change. Moreover, Ozgen (2013) notes that migration is increasing in absolute scale but also in complexity in many parts of the world. As the composition of the migrant population is often very different from that of the country of destination immigration is usually accompanied by an increasing cultural diversity of the host society (Nijkamp 2012).
