School of Mathematical Sciences, Queen Mary University of London, London E1 4NS, United Kingdom.
Department of Economics and Finance, Durham University, Durham DH1 3LB, United Kingdom.
Phys Rev Lett. 2021 Dec 24;127(26):268301. doi: 10.1103/PhysRevLett.127.268301.
We introduce an evolutionary game on hypergraphs in which decisions between a risky alternative and a safe one are taken in social groups of different sizes. The model naturally reproduces choice shifts, namely the differences between the preference of individual decision makers and the consensual choice of a group, that have been empirically observed in choice dilemmas. In particular, a deviation from the Nash equilibrium toward the risky strategy occurs when the dynamics takes place on heterogeneous hypergraphs. These results can explain the emergence of irrational herding and radical behaviors in social groups.
我们介绍了一种超图上的进化博弈，其中在不同大小的社会群体中做出风险选择和安全选择的决策。该模型自然地再现了选择转移，即个体决策者的偏好与群体的共识选择之间的差异，这在选择困境中已经得到了实证观察。特别是，当动态发生在异构超图上时，就会偏离纳什均衡到风险策略。这些结果可以解释在社会群体中出现的非理性跟风和激进行为。
