gross migrationとは 意味・読み方・使い方

The population of a sovereign country (305-3) may be involved in internal migration ¹ when both place of departure (801-4) and place of destination (801-5) are within the country, or in international migration ² which occurs across national boundaries. The term external migration ³ is sometimes encountered in the latter sense. International migration is called immigration ⁴ or emigration ⁵ according to whether the country in question is the country of destination or the country of origin. When the country is divided into sub-areas, movement within the boundaries of each sub-area are local moves ⁶ and constitute residential mobility ⁶, while movement between sub-areas is called in-migration ⁷ or out-migration ⁸ depending on whether the sub-area considered is the place of destination or the place of origin for the migrants. A migration stream ⁹ is a group of migrants having a common origin and destination. The larger stream between two sub-areas is called the dominant stream ¹⁰ and the smaller the counterstream ¹¹.

• 1. The definitions of migration in this paragraph can be extended to the migrants involved. The distinction between internal and international migration is not always precise when territories within a country are more or less autonomous.
• 2. Simple commuting across a national border receives the name of border traffic, and should not be mistaken for international migration.
• 4. Immigration, n. - immigrate, v. - immigrant, n. and adj.
• 5. Emigration, n. - emigrate, v. - emigrant, n. and adj.

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