Motivating grandparental investment

Behavioral and Brain Sciences 33 (1):24-25 (2010)
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Abstract

What makes the question of grandparental investment so very interesting is trying to tease out the underlying motivations. Grandparental investment is variable and grandparental altruism, if it exists at all, is also variable. Neither evolutionary theory nor rational choice theory has an easy time explaining this variation, and insight is further impeded by the absence of any compelling empirical studies designed for the purpose of testing alternative explanations of variations in grandparental investment

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Grandparental investment: Past, present, and future.David A. Coall & Ralph Hertwig - 2010 - Behavioral and Brain Sciences 33 (1):1-19.

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