In Bolivia, 35% of the population is younger than age 15,...

In Bolivia, 35% of the population is younger than age 15, and 5% is older than 65. In Austria, 14% of the
population is younger than 15, and 18% is older than 65. Which country will have the highest growth rate over the next two decades? Explain your answer

Key Concepts

Age Structure

Age structure refers to the distribution of various age groups within a population. When a large proportion of the population is very young, as in Bolivia, it indicates that there will soon be many individuals entering their reproductive years, leading to potential rapid population growth. Conversely, a population with a larger proportion of older individuals, as in Austria, may experience slower growth because fewer people are in the reproductive age group.

Population Momentum

Population momentum is the phenomenon where a population continues to grow even after fertility rates decline, due to a relatively high proportion of young people. In Bolivia, the significant percentage of the population under age 15 means that there is a large pool of individuals who will eventually contribute to the birth rate, accelerating growth. This momentum is less evident in countries with a higher proportion of older residents, like Austria.

Demographic Transition

The demographic transition is a model that describes the transition from high birth and death rates to lower birth and death rates as a country develops. Countries in earlier stages, with a larger younger population, tend to have higher potential growth. Bolivia’s demographic structure, characterized by a high percentage of young individuals, suggests it might still be experiencing higher fertility and growth rates, whereas Austria is likely further along in the transition with more stability or an aging population.

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