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「同样 5 条边,中心玩家行动差 91%」:网络博弈的均衡是谱的函数,不是度的函数

【锚点】这一篇只钉一个判断:在互补性网络博弈里,纳什均衡是一个【全局谱量】的函数,而不是【局部度】的函数。任何用「平均度」「度分布」去预测行为的做法,都在默认一个从未被检验的假设:邻接矩阵 A 的谱由度分布决定。这个假设在随机图上近似成立,在结构化图上会错到离谱。 【显式】先把模型摆出来。Ballester–Calatayud–Zenou (2006)、Bramoullé–Kranton…

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