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Learning Reciprocity in Complex Sequential Social Dilemmas

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arxiv 1903.08082 v1 pith:Q7GPFNCV submitted 2019-03-19 cs.MA cs.LG

classification cs.MAcs.LG
keywords socialdilemmaslearningreciprocityagentsbehaviorco-playersgame
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Reciprocity is an important feature of human social interaction and underpins our cooperative nature. What is more, simple forms of reciprocity have proved remarkably resilient in matrix game social dilemmas. Most famously, the tit-for-tat strategy performs very well in tournaments of Prisoner's Dilemma. Unfortunately this strategy is not readily applicable to the real world, in which options to cooperate or defect are temporally and spatially extended. Here, we present a general online reinforcement learning algorithm that displays reciprocal behavior towards its co-players. We show that it can induce pro-social outcomes for the wider group when learning alongside selfish agents, both in a $2$-player Markov game, and in $5$-player intertemporal social dilemmas. We analyse the resulting policies to show that the reciprocating agents are strongly influenced by their co-players' behavior.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Learning to Contest: Decentralized Robust Fairness in Cooperative MARL via Cross-Attention

    cs.MA 2026-06 unverdicted novelty 7.0 of 10

    CAN uses permutation-equivariant cross-attention to infer free-rider count from observed behavior and contest proportionally, keeping exploitability near centralized levels at no efficiency cost in fair cooperative MARL.

  2. Calibrating Artificial Guilt: Neurally Grounded Reward Shaping for Prosocial Multi-Agent Reinforcement Learning

    cs.AI 2026-08 reject novelty 6.0 of 10

    A happiness-regression contrast from the SoDec dataset is used as a reward-shaping weight in a two-agent Social Lottery, yielding a safe rate of 0.459 versus a human 0.484, but the contrast is statistically indistingu...

  3. Modeling human reputation-seeking behavior in a spatio-temporally complex public good provision game

    cs.MA 2025-06 conditional novelty 2.0 of 10

    A reputation-motivated multi-agent RL model reproduces human groups' cooperation under identifiability and its collapse under anonymity in the Clean Up public goods game.

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