The widespread evolution of gregarious development in parasitoid wasps presents a theoretical challenge because the conditions under which larval tolerance can spread in an intolerant population are very stringent (the individual fitness of larvae developing together must increase with clutch...

This essay asserts that the mutual gains accruing from the exchange of goods between siblings can moderate the famous parent-offspring conflict, an issue of interest in evolutionary biology. The rationale combines basic concepts of economics and behavioral genetics, and fills in the gaps of...

By combining basic concepts from economics and genetic economics, I elaborate a rationale for the mutual gains from the exchange of goods between siblings to moderate the famous parent-offspring conflict, an issue of interest for evolutionary psychology. The rationale also fills in the gaps of...

Living in poverty is associated with high levels of protracted stress associated with health problems. Economic and food insecurity are particularly poignant aspects of poverty and condition the work of securing basic daily needs of families. Recent studies suggest that levels of stress increase...

This paper explores the expected outcome of maternal nutritional “buffering,” namely that children's diets will be more adequate than mothers' diets under conditions of food scarcity. Data on Amazonian mothers and their children, household demography and economics and direct, weighed...