Symbol α
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Hawkes, O’Connell, Blurton Jones, Alvarez and Charnov turned this ethnographic observation into a formal life-history argument the following year, using Eric Charnov’s dimensionless framework for comparing life-history variables across mammal species. Their comparison of fertility-rate parameters is precise: the annual birth-rate parameter they call b is 0.142 for humans against a range of 0.063 to 0.126 across the great apes they compare against, and the product of age at maturity and that fertility rate, b , comes out to 2.05 for humans against 0.46 to 0.79 for apes [ 1 ] . Humans combine a maturation schedule that, on Charnov’s dimensionless terms, resembles other apes’ with a…
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Symbol b
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Equation 6 · Evolutionary Psychology
The Longest Childhood: Life-History Theory and the Grandmother Bet
This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.
Hawkes, O’Connell, Blurton Jones, Alvarez and Charnov turned this ethnographic observation into a formal life-history argument the following year, using Eric Charnov’s dimensionless framework for comparing life-history variables across mammal species. Their comparison of fertility-rate parameters is precise: the annual birth-rate parameter they call b is 0.142 for humans against a range of 0.063 to 0.126 across the great apes they compare against, and the product of age at maturity and that fertility rate, b , comes out to 2.05 for humans against 0.46 to 0.79 for apes [ 1 ] . Humans combine a maturation schedule that, on Charnov’s dimensionless terms, resembles other apes’ with a…
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