Population movements have been a constant feature of the evolution of human civilisation. For a variety of reasons – social, political, economic, natural and climatic -migration occurs within the geographical limits of states and beyond. In recent years, globalisation has given a new thrust to the international labour market, adding a new dimension to inter-state migration. While migration between countries in the developed world is a two-way traffic, demographic mobility from the developing to the more advanced countries is generally uni-directional.
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