Grandparental investment: past, present, and future.

  title={Grandparental investment: past, present, and future.},
  author={David A Coall and Ralph Hertwig},
  journal={The Behavioral and brain sciences},
  volume={33 1},
  pages={1-19; discussion 19-40}
What motivates grandparents to their altruism? We review answers from evolutionary theory, sociology, and economics. Sometimes in direct conflict with each other, these accounts of grandparental investment exist side-by-side, with little or no theoretical integration. They all account for some of the data, and none account for all of it. We call for a more comprehensive theoretical framework of grandparental investment that addresses its proximate and ultimate causes, and its variability due to… CONTINUE READING


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