Best response
（重定向自Reaction correspondence）
![Figure 1. Reaction correspondence for player Y in the Stag Hunt game.](/Images/godic/202502/06/Reaction_correspondence_player_y4048.jpg")
![Figure 2. Reaction correspondence for player X in the Stag Hunt game.](/Images/godic/202502/06/Reaction-correspondence-playerx4048.jpg")
![Figure 3. Reaction correspondence for both players in the Stag Hunt game. Nash equilibria shown with points, where the two player's correspondences agree, i.e. cross](/Images/godic/202502/06/Reaction-correspondence-stag-hunt4048.jpg")
![Figure 4. Reaction correspondence for both players in the hawk-dove game. Nash equilibria shown with points, where the two player's correspondences agree, i.e. cross](/Images/godic/202502/06/Reaction-correspondence-hawk-dove4048.jpg")
In game theory, the best response is the strategy (or strategies) which produces the most favorable outcome for a player, taking other players' strategies as given (Fudenberg & Tirole 1991, p. 29; Gibbons 1992, pp. 33–49). The concept of a best response is central to John Nash's best-known contribution, the Nash equilibrium, the point at which each player in a game has selected the best response (or one of the best responses) to the other players' strategies (Nash 1950).