Given a constant fertility rate over time any inverted pyramid would eventually ... | Hacker News

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		lanfeust6 on Jan 22, 2023 \| parent \| context \| favorite \| on: Japan was the future but it's stuck in the past Given a constant fertility rate over time any inverted pyramid would eventually straighten out.

hortense on Jan 22, 2023 [–]

If you take a constant fertility rate of 1, you'll always have an inverted pyramid, until there's no more pyramid.

(I'm assuming that the life expectancy does not change significantly)

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