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demographic balancing equation


'demographic balancing equation' can also refer to...

 

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An equation that is used to calculate population changes from one year to the next in a given area, based on number of births, deaths, and migrations. The general form of the equation is a mass balance equation, in which end population = starting population ± natural increase ± net migration, where natural increase = births – deaths, and net migration = immigrants – emigrants. At the global scale there is no net migration (unless the Earth is invaded by aliens from another planet, or people permanently leave the Earth to set up home in space), so the balancing equation is then simply end population = starting population ± natural increase.

Subjects: Environmental Science.


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