Grouping promotes both partnership and rivalry with long memory in direct reciprocity.

ABSTRACT: Biological and social scientists have long been interested in understanding how to reconcile individual and collective interests in the iterated Prisoner's Dilemma. Many effective strategies have been proposed, and they are often categorized into one of two classes, 'partners' and 'rivals.' More recently, another class, 'friendly rivals,' has been identified in longer-memory strategy spaces. Friendly rivals qualify as both partners and rivals: They fully cooperate with themselves, like partners, but never allow their co-players to earn higher payoffs, like rivals. Although they have appealing theoretical properties, it is unclear whether they would emerge in an evolving population because most previous works focus on the memory-one strategy space, where no friendly rival strategy exists. T

SUBMITTER: Murase Y 

PROVIDER: S-EPMC10313083 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature