GEO-1400 Lecture Notes - Lecture 3: Demographic Transition, Family Reunification, Internally Displaced Person
Document Summary
Net migration - the difference between the number of immigrants and emigrants. Geography has no comprehensive theory of migrations. An outline of migration laws written by 19th century geographer e. g. Ravenstein is the basis for contemporary geographic migration studies. Ravenstein formulated laws for the distance that migrants travel to their new homes. Most migrants relocate a short distance and remain within the same country. Long-distance migrants to other countries head for major centers of economic activity. Migration can be divided into internal migration and international migration. Internal migration can be divided into interregional migration an intraregional migration. On a global scale (3 largest flow of immigration) Geographer wilbur zelinski identified a migration transition comparable to the demographic transition. The two main sources of early migration to the american colonies were the uk and africa. About 2 million britain"s came to america prior to 1840. 650,000 africans were shipped as slaves, even after their importation was made illegal in 1808.
