Show Summary Details

Page of

PRINTED FROM OXFORD HANDBOOKS ONLINE (www.oxfordhandbooks.com). © Oxford University Press, 2018. All Rights Reserved. Under the terms of the licence agreement, an individual user may print out a PDF of a single chapter of a title in Oxford Handbooks Online for personal use (for details see Privacy Policy and Legal Notice).

date: 20 April 2019

Abstract and Keywords

The four categories of grandparents differ in their investment in grandchildren, with the maternal grandmother investing the most and taking an outstanding position, followed usually by the maternal grandfather, the paternal grandmother, and the paternal grandfather. This discriminative grandparenting is manifest in many investment proxies, like contact and care, expressions of affection, grandchild survival, and others. The recurrent rank order of the four grandparent categories is best explained by two basic reproductively relevant variables: relationship uncertainty and sex-specific reproductive strategy. The expression of these variables is moderated by several conditions, among others residential proximity, marital status of grandparent, family size, type of joint activity, age of child, and grandparent−grandchild similarity. In natural fertility populations, the availability of the maternal grandmother increases chances for child survival. In industrialized countries, the positive impact of grandparental support is still evident in high-risk family conditions under circumstances of duress.

Keywords: Grandparental care, grandparental investment, grandparental solicitude, relationship uncertainty, reproductive strategy, grandmother hypothesis, sex-chromosome relatedness, animal grandparenting, matrilineal bias, sex-biased investment

Access to the complete content on Oxford Handbooks Online requires a subscription or purchase. Public users are able to search the site and view the abstracts and keywords for each book and chapter without a subscription.

Please subscribe or login to access full text content.

If you have purchased a print title that contains an access token, please see the token for information about how to register your code.

For questions on access or troubleshooting, please check our FAQs, and if you can''t find the answer there, please contact us.