出典:国際連合
The generic term migration rate 1 refers to any rate which measures the relative frequency of migration within a population. Unless indicated otherwise these rates should be taken as annual migration rates 2. They may be obtained as the ratio of the average annual number of movements during a certain period, to the average population of the period. An annual rate of net migration 3 and an annual rate of total migration 4 are calculated in a similar fashion by using the appropriate information on net and total migration. An index of migration effectiveness 5 or effectiveness index s is calculated as the ratio of net migration to total in- and out-migration. The range of the index is from zero, when arrivals and departures are equal in number, to one, when migration is entirely one way.
出典:Wiktionary
出典:『Wiktionary』 (2025/07/21 18:17 UTC 版)
From re- + distribution.
redistribution (countable and uncountable, plural redistributions)