*twice* as long?! That is nuts, what's the math on that. Am I wrong in understan... | Hacker News

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		cblades on May 29, 2019 \| parent \| context \| favorite \| on: If the number of children is not growing, why is t... twice as long?! That is nuts, what's the math on that. Am I wrong in understanding that to mean, e.g., in lots of places the life expectancy was 40 and now it's 80?

cadlin on May 29, 2019 [–]

Life expectancy is largely driven by infant mortality. Each marginal child that lives to 60 is equal to 12 adults living 5 years longer.

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