Brain drain- Large-scale emigration by talented people.
Branch - (of a religion) A large and fundamental division within a religion.
Chain migration - Migration of people to a specific location because relatives or members of the same nationality previously migrated there.
Circulation - Short-term, repetitive, or cyclical movements that recur on a regular basis.
Counter-urbanization - Net migration from urban to rural areas in more developed countries.
Emigration - Migration from a location.
Floodplain - The area subject to flooding during a given number of years according to historical trends.
Forced migration - Permanent movement compelled usually by cultural factors.
Guest workers - Workers who migrate to the more developed countries of Northern and Western Europe, usually from Southern and Eastern Europe or from North Africa, in search of higher-paying jobs.
Immigration - Migration to a new location.
Internal migration - Permanent movement within a particular country.
International migration - Permanent movement from one country to another.
Interregional migration - Permanent movement from one region of a country to another.
Intervening obstacle - An environmental or cultural feature of the landscape that hinders migration.
Intraregional migration - Permanent movement within one region of a country.
Migration - Form of relocation diffusion involving permanent move to a new location.
Migration transition - Change in the migration pattern in a society that results from industrialization, population growth, and other social and economic changes that also produce the demographic transition.
Mobility - All types of movement from one location to another.
Net migration - The difference between the level of immigration and the level of emigration.
Pull factors - Factors that induce people to move to a new location.
Push factors - Factors that induce people to leave old residences.
Quota - In reference to migration, a law that places maximum limits on the number of people who can immigrate to a country each year
Refugees - People who are forced to migrate from their home country and cannot return for fear of persecution because of their race, religion, nationality, membership in a social group, or political opinion.
Undocumented immigrants - People who enter a country without proper documents.
Voluntary migration - Permanent movement undertaken by choice.
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