In the context of population studies, an upside-down pyramid shape refers to a population structure where the older age groups make up a larger proportion than the younger ones. This is often due to low birth rates and high life expectancy.
Imagine a real-life pyramid flipped upside down. The base, which is now at the top, represents the older generation in society who are numerous. The tip, now at the bottom, represents fewer young people being born into that society.
Age Structure Diagrams: These are graphical representations that show the distribution of various age groups in a population.
Demographic Transition Model: This model explains how countries transition from having high birth and death rates to low birth and death rates as they develop economically.
Population Aging: This term refers to an increase in the number and proportion of older individuals in a population.
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