Some starting points
“Grandparental investment as a function of relational uncertainty and emotional closeness with parents”
http://www.springerlink.com/content/8e2cwq89br0mhn88/
“Differential Investment Behavior between Grandparents and Grandchildren: The Role of Paternity Uncertainty”
http://www.epjournal.net/filestore/EP076677.pdf
“An Evolutionary Perspective on Parental and Grandparental Investment (2010)”
http://www.narcis.info/publication/RecordID/oai%3Adspace.library.uu.nl%3A1874%2F40155
“LINEAGE BASED DIFFERENCES IN GRANDPARENTAL INVESTMENT: EVIDENCE FROM A LARGE BRITISH COHORT STUDY”
http://www.staff.ncl.ac.uk/daniel.nettle/jbs.pdf
Some starting points
“Grandparental investment as a function of relational uncertainty and emotional closeness with parents”
http://www.springerlink.com/content/8e2cwq89br0mhn88/
“Differential Investment Behavior between Grandparents and Grandchildren: The Role of Paternity Uncertainty”
http://www.epjournal.net/filestore/EP076677.pdf
“An Evolutionary Perspective on Parental and Grandparental Investment (2010)”
http://www.narcis.info/publication/RecordID/oai%3Adspace.library.uu.nl%3A1874%2F40155
“LINEAGE BASED DIFFERENCES IN GRANDPARENTAL INVESTMENT: EVIDENCE FROM A LARGE BRITISH COHORT STUDY”
http://www.staff.ncl.ac.uk/daniel.nettle/jbs.pdf