explain about internal migration in 20 sentences..........plz fast.......!
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Internal migration or domestic migration is human migration within one geopolitical entity, usually a nation-state. Internal migration tends to be travel for education and for economic improvement or because of a natural disaster or civil disturbance. Cross-border migration often occurs for political or economic reasons. A general trend of movement from rural to urban areas, in a process described as urbanization, has also produced a form of internal migration.Internal migration is defined and is distinguished as to its caused and its consequences. Most migration research deals with causes. Migration rates are compared across industrialized countries (with Australia, Canada, New Zealand, and the USA shown to have high rates), and various migration patterns are described, especilally with respect to age and education. Migration rates are shown to fall with age after the early twenties and to rise sharply with education. Different theoretical perspectives on migration are discussed (namely, the disequilibrium perspective and the equilibrium perspective). Morover, various theories of migration are noted, with the human capital model singled out for special attention. Empirical findings consistent with and incosistent with this model are discussed.