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Studies show that the pre-modern migration of human populations begins with the movement of Homo erectus out of Africa across Eurasia about 1.75 million years ago. Homo sapiens appeared to have occupied all of Africa about 150,000 years ago; some members of this species moved out of Africa 70,000 years ago (or, according to more recent studies, as early as 125,000 years ago into Asia, [1] [2 ...
A subtype of internal migration is the migration of immigrant groups –often called secondary or onward migration. Secondary migration is also used to refer to the migration of immigrants within the European Union.
The Migration Act 1958 (Cth) is an Act of the Parliament of Australia that governs immigration to Australia. [2] It set up Australia’s universal visa system (or entry permits).
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The International Refugee Organization (IRO) was an intergovernmental organization founded on 20 April 1946 to deal with the massive refugee problem created by World War II.
Map of members of the United Nations, an organization that has discussed and engaged in internationality. Internationality, or the international, is the concept of something involving more than a single country and may suggest interaction between or encompassing more than one nation, or generally beyond national boundaries.
The Harris–Todaro model, named after John R. Harris and Michael Todaro, is an economic model developed in 1970 and used in development economics and welfare economics to explain some of the issues concerning rural-urban migration.
The level of gene flow among populations can be estimated by observing the dispersal of individuals and recording their reproductive success. [4] [11] This direct method is only suitable for some types of organisms, more often indirect methods are used that infer gene flow by comparing allele frequencies among population samples.