Why do females care more than males?

@article{Queller1997WhyDF,
  title={Why do females care more than males?},
  author={David C. Queller},
  journal={Proceedings of the Royal Society of London. Series B: Biological Sciences},
  year={1997},
  volume={264},
  pages={1555 - 1557}
}
  • D. Queller
  • Published 22 November 1997
  • Biology
  • Proceedings of the Royal Society of London. Series B: Biological Sciences
Females tend to provide more parental care than males. Previous efforts to account for this have been confused because it is difficult to express the costs of care for males and females in the same currency. Here I propose a null model that does so, using the Fisherian constraint that total male and female reproduction must be equal. The model shows that, contrary to a number of recent analyses, lower probability of parentage for males does tend to make males less likely than females to provide… 
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