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A city has a stable total population, but equal numbers of working-age people move in while elderly people move out. What is a likely effect?

Answer and explanation

Correct answer: The age structure may become younger

A population can keep the same total size while its internal composition changes. Net migration is the number entering minus the number leaving, so equal numbers entering and leaving produce zero net migration. However, the ages and characteristics of those two groups still matter for the age structure.

Here, working-age people enter while elderly people leave. The total count can therefore remain stable, but the share of younger or working-age residents can rise and the share of elderly residents can fall. This makes the population structure younger, so option A is correct. A structural change does not require a change in total population, and natural increase is not guaranteed merely by this movement.

Related tags

Zero Net MigrationAge StructureWorking Age MigrantsPopulation CompositionPopulation GrowthThe World Population – DistributionDensity And GrowthThe World Population Distribution Density And Growth

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