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"Financial analysts who study demography like popular author Harry Dent argue that one of the main drivers of a country's economic growth is the number of people in the country who are in their peak spending years.
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For example, Dent says that in the U.S., 46-50 year olds are the biggest spenders, because that is when - on average - they are paying for their kids' college, paying mortgage on the biggest house they will own during their life, etc.
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Dent argues that the American economy will tend to grow when the number of 46-50 year olds grows, and to shrink when it shrinks. Dent says this principle applies to all countries, although the peak spending years might vary slightly from country to country. For example, the peak Japanese spending range has been estimated to be comprised of 39-43 year olds."
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Como é a demografia na Europa?
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"The Age of the Population Affects Economic Growth"