双群体社会中的惩罚
Punishment in bipartite societies
AI总结：
研究揭示了双群体社会中对称跨群体惩罚对促进合作及提升社会效益的关键作用。
摘要：
从蚂蚁与豆科植物的共生关系到因纽特人之间的表演性冲突解决，不同子集之间的专门惩罚现象普遍存在，并能重塑合作的进化轨迹。现有研究主要关注同质群体内的惩罚，对属于子集在实际策略中同样重要的合作动态关注较少。为填补这一空白，我们研究了一个双群体人口，其中公共物品游戏中的合作者会专门惩罚属于另一子集的背叛者。我们发现，在对称的跨群体惩罚下，合作可以出现并保持稳定。特别是，在惩罚强度较低且 dilemma 游戏的增强因子值较小时，跨群体惩罚促进合作的效果优于统一应用的惩罚。此外，在双群体人口中，跨群体惩罚对整体社会效益更有利。当这种激励被平衡时，合作者可以通过随机形成的协作小组的集体互动来遏制另一子集的背叛者，提供更有效的激励。相反，打破跨群体惩罚的对称性会抑制合作，因为这种不平衡会在执行结构中形成阿喀琉斯之踵。我们的工作揭示了跨群体惩罚的对称性作为合作在人类和生物系统中的统一原则。
英文摘要：
From ant-acacia mutualism to performative conflict resolution among Inuit, dedicated punishments between distinct subsets of a population are widespread and can reshape the evolutionary trajectory of cooperation. Existing studies have focused on punishments within a homogeneous population, paying little attention to cooperative dynamics in a situation where belonging to a subset is equally important to the actual strategy represented by an actor. To fill this gap, we here study a bipartite population where cooperator agents in a public goods game penalize exclusively those defectors who belong to the alternative subset. We find that cooperation can emerge and remain stable under symmetric intergroup punishment. In particular, at low punishment intensity and at a small value of the enhancement factor of the dilemma game, intergroup punishment promotes cooperation more effectively than a uniformly applied punishment. Moreover, intergroup punishment in bipartite populations tends to be more favorable for overall social welfare. When this incentive is balanced, cooperators can collectively restrain defectors of the alternative set via aggregate interactions in a randomly formed working group, offering a more effective incentive. Conversely, breaking the symmetry of intergroup punishment inhibits cooperation, as the imbalance creates an Achilles' heel in the enforcement structure. Our work, thus, reveals symmetry in intergroup punishment as a unifying principle behind cooperation across human and biological systems.
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