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More than 300 million people, almost 4% of the world's population, now live outside their country of origin. In this article we examine the main global migration trends and how public policy is evolving to address this challenge. Migration flows have historically reflected human needs: escaping armed conflict, violence against specific groups and natural disasters or, in most cases, simply seeking better opportunities. By moving from less developed regions or countries to more prosperous ones, migrants can improve their living standards and put their time and talents to more productive use, benefiting from better institutions, markets and technologies, as well as from a less uncertain environment.
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