ECOS2001 Lecture Notes - Lecture 10: Matching Pennies, Oligopoly, Best Response

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A game is defined by: set of players: {(cid:883),(cid:884), ,}, set of strategies (cid:1845) for each player, payoffs for each player for each strategy profile =(cid:4666)(cid:2869),(cid:2870), ,(cid:4667)=(cid:4666), (cid:4667):(cid:4666), (cid:4667) Strategy strictly dominates if for every strategy profile of the others , player strictly prefers over : (cid:4666), (cid:4667)>(cid:4666) , (cid:4667). Dominance: d is strictly dominant / d strictly dominates c, c is strictly dominated by d. Ecos2001 intermediate microeconomics: d strictly dominates c, c is strictly dominated by d, c is not dominated by pd, d is not strictly dominant, d weakly dominates c, c is weakly dominated by d, d is weakly dominant. Strategy weakly dominates if for every strategy profile of the others , player prefers over : (cid:4666), (cid:4667) (cid:4666) , (cid:4667). For profit function (cid:4666), (cid:4667), strategy is a best-response to strategy if it maximises player (cid:859)s utility: (cid:4666), (cid:4667)>(cid:4666) , (cid:4667) for all strategies .

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