Mutation enhances cooperation in direct reciprocity

no code implementations • 12 Apr 2023 • Josef Tkadlec, Christian Hilbe, Martin A. Nowak

But high levels of cooperation evolve only if the benefit-to-cost ratio exceeds a certain threshold that depends on memory length.

Indirect reciprocity with stochastic rules

1 code implementation • 2 Mar 2023 • Yohsuke Murase, Christian Hilbe

First, we allow social norms to be stochastic.

Evolution of direct reciprocity in group-structured populations

1 code implementation • 28 Jul 2022 • Yohsuke Murase, Christian Hilbe, Seung Ki Baek

In this work, we study how the two mechanisms interact.

Evolutionary instability of selfish learning in repeated games

1 code implementation • 13 May 2021 • Alex McAvoy, Julian Kates-Harbeck, Krishnendu Chatterjee, Christian Hilbe

However, when two such "selfish" learners interact with each other, the outcome can be detrimental to both, especially when there are conflicts of interest.

Fairness