1.	Grandparental investment: the influence of reproductive timing and family size  •  David A Coall, University of Western Australia; Marc Meier, University of Basel; Ralph Hertwig, University of Basel; Michaela Wänke, University of Basel; François Höpflinger, University of Zürich

2.	Sharing among sons: resource-dependant sibling competition for reproduction and inheritance among the Arsi Oromo  •  Mhairi Gibson, University of Bristol

3.	Intra-family exchange and Europe’s low fertility  •  Robert G. White, University of Wisconsin at Madison; Laura Bernardi, Max Planck Institute for Demographic Research and Université de Lausanne

4.

The co-evolution of the ageing process, lifespan, and intergenerational transfers  •  Hillard S. Kaplan, University of New Mexico; Michael D. Gurven, University of California, Santa Barbara; Jeff Winking, University of New Mexico; Paul Hooper, University of New Mexico; Jon Stieglitz, University of New Mexico; Katherine Hinde, University of California, Santa Barbara; Daniel Eid R, Universidad Mayor San Simon, Bolivia

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