.SystemDynamics.WorldDynamics.World3.Population_Dynamics

Information

This model describes the population dynamics of the WORLD3 model. Whereas the earlier WORLD2 model had lumped all of the population together into a single state variable, WORLD3 offers a demographic model that distinguishes between four age groups, those of the children, those of the younger adults representing the child-bearing population, those of the older adults who are still in the work force, and finally, those of the retired population.

Population is measured in numbers of living humans. In accordance with engineering practice, which (arbitrarily) assigns measurement units only to real-valued quantities and not to integer-valued quantities, this model lists the population as dimensionless.

This model is described on p.142 of Dynamics of Growth in a Finite World.

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