论文标题
中等移民可以促进当地人之间的合作高峰
Moderate immigration may promote a peak of cooperation among natives
论文作者
论文摘要
在一个坚强的边界世界中，各国可能会剥夺自己享受合作移民的好处。在这里，我们分析了有效的合作移民对玩公共物品游戏的人口的影响。我们考虑了一个人口在一个方格上构建的人群，个人与邻居一起玩公共物品游戏。人口统计学是由随机诞生，死亡和移民决定的。策略通过模仿动态传播。我们的模型表明，由于可以提供更好质量公共物品的良好角色模型代理的社会传染，土著人之间的合作可以出现。在移民中，只有一小部分有效的合作者足以触发本地人口的合作。我们看到，本地合作以中等的移民速率值达到顶峰。这种有效的移民合作者是合作群集生长的成核中心，最终主导了叛逃。
In a world of hardening borders, nations may deprive themselves of enjoying the benefits of cooperative immigrants. Here, we analyze the effect of efficient cooperative immigrants on a population playing public goods games. We considered a population structured on a square lattice with individuals playing public goods games with their neighbors. The demographics are determined by stochastic birth, death, and migration. The strategies spread through imitation dynamics. Our model shows that cooperation among natives can emerge due to social contagion of good role-model agents that can provide better quality public goods. Only a small fraction of efficient cooperators, among immigrants, is enough to trigger cooperation across the native population. We see that native cooperation achieves its peak at moderate values of immigration rate. Such efficient immigrant cooperators act as nucleation centers for the growth of cooperative clusters, that eventually dominate defection.
