The shared reward dilemma

The shared reward dilemma.

One of the most direct human mechanisms of promoting cooperation is rewarding it. We study the effect of sharing a reward among cooperators in the most stringent form of social dilemma, namely the prisoner's dilemma (PD). Specifically, for a group of players that collect payoffs by playing a pairwise PD game with their partners, we consider an external entity that distributes a fixed reward equ...

Social reward shaping in the prisoner's dilemma

Reward shaping is a well-known technique applied to help reinforcement-learning agents converge more quickly to nearoptimal behavior. In this paper, we introduce social reward shaping, which is reward shaping applied in the multiagentlearning framework. We present preliminary experiments in the iterated Prisoner’s dilemma setting that show that agents using social reward shaping appropriately c...

Risky Punishment and Reward in the Prisoner’s Dilemma

Physician engagement and shared accountability. Buzzwords, dilemma or choice?

Emergence and resilience of cooperation in the spatial prisoner's dilemma via a reward mechanism.

We study the problem of the emergence of cooperation in the spatial Prisoner's Dilemma. The pioneering work by Nowak and May [1992. Evolutionary games and spatial chaos. Nature 415, 424-426] showed that large initial populations of cooperators can survive and sustain cooperation in a square lattice with imitate-the-best evolutionary dynamics. We revisit this problem in a cost-benefit formulatio...