Reducing global inequality increases local cooperation: a simple model of group selection with a global externality.

Group-structured models often explain the evolution of prosocial activities in terms of selection acting at both individual and group levels. Such models do not typically consider how individuals' behaviours may have consequences beyond the boundaries of their groups. However, many behaviours affect global environmental variables, including climate change and ecosystem fragility.

The leakage effect may undermine the circular economy efforts.

In this paper, we examine the impact of the circular economy on global resource extraction. To this end, we make an input-output analysis dynamic by combining it with an agent-based model of the capital sector. This approach allows us to study the evolution of the circular economy due to the endogenous decisions of firms on whether to invest in the capital expansion of primary or secondary sectors.

The coevolution of culture and environment.

We propose a model of multi level (group) selection in the presence of climate variability, where environment and culture coevolve. The model describes a population subdivided into groups, each with access to a renewable resource. Individuals employ different harvesting strategies: Defectors harvest more resources than cooperators and punishers.