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	アロー・ドゥブリュー均衡	クールノー競争
分野	ゲーム理論	ゲーム理論
系統	Machine learning	Machine learning
提唱年	1954	1838
提唱者	Kenneth Arrow, Gerard Debreu	Augustin-Louis Cournot
種類	algorithm	algorithm
原典	Arrow, K. J., & Debreu, G. (1954). Existence of an equilibrium for competitive economies. Econometrica, 22(3), 265-290.	Cournot, A. A. (1838). Recherches sur les principes mathématiques de la théorie des richesses. L. Hachette.
別名	Walrasian Equilibrium, General Equilibrium, Competitive Equilibrium	Quantity Competition, Cournot Equilibrium, Cournot-Nash Equilibrium
関連	4	4
概要	The Arrow-Debreu model is a general equilibrium framework where prices adjust to clear all markets simultaneously, and consumers and firms optimize given those prices. Introduced by Kenneth Arrow and Gerard Debreu in 1954, the model extends Adam Smith's invisible hand concept into a rigorous mathematical framework. Arrow-Debreu equilibrium proves existence, uniqueness (under certain conditions), and Pareto efficiency of competitive equilibria.	Cournot Competition models oligopolistic markets where firms choose quantities simultaneously, not prices. Originally formulated by Augustin-Louis Cournot in 1838, the model assumes each firm's profit depends on the total market quantity produced. The resulting Cournot-Nash Equilibrium captures the strategic interaction where each firm maximizes profit given competitors' quantities, leading to prices between monopoly and perfect competition levels.