为连续时间平均场博弈设计最优粗相关均衡,实现性能优化与可学习性。
Optimal Coarse Correlated Equilibria in Mean Field Games: Linear Programming and No-Regret Learning

- 通过线性规划构建最优粗相关均衡的数学框架
- 提出无后悔学习算法并给出明确收敛速率
- 适合研究博弈优化与大规模系统协调的学者
我们引入了连续时间平均场博弈中的最优粗相关均衡。粗相关均衡是一种随机推荐机制,任何个体若无视推荐而改用其他策略均无法获益。问题核心在于:在所有平均场粗相关均衡中,选择一个能优化特定性能指标的均衡,该指标可不同于代表性玩家的目标。我们建立了线性规划(LP)形式化模型,证明了最优LP粗相关均衡的存在性,并将该LP刻画与原始概率设定相联系。基于此,我们设计了一种基于等价拉格朗日形式的无后悔原对偶算法,用于学习此类均衡。我们给出了该学习算法的显式收敛速率,并通过数值例子验证方法有效性。
原文摘要 · Abstract (English)
We introduce optimal coarse correlated equilibria for continuous-time mean field games. A coarse correlated equilibrium is a randomized recommendation scheme from which no player can gain by ignoring the recommendation and switching to an alternative strategy. The problem is as follows: a moderator selects, among all mean-field coarse correlated equilibria, one that optimizes a prescribed performance criterion, which may differ from the representative player's objective. After formulating the problem, we develop a linear programming (LP) formulation, prove the existence of optimal LP coarse correlated equilibria, and relate the LP characterization to the original probabilistic setting. Building on this characterization, we design a no-regret primal-dual algorithm, based on an equivalent Lagrangian formulation of the external-regret constraint, for learning such equilibria. We provide explicit convergence rates for the learning algorithm, and numerical examples illustrate the method.
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