the players have the same set of actions, i.e. A₁ = A2, and payoffs are sym- metric: u₁(a1, a2) u₂(a2, a1) for all a1, a2 € A₁ A2. Show that every two-player symmetric game has a symmetric mixed Nash equilibrium, i.e. a Nash equilibrium where both players choose the same mixed action. = =

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You should show that the best response map gives a fixed-point in symmetric strategies

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A two-player static game is symmetric if
the players have the same set of actions, i.e. A₁ = A2, and payoffs are sym-
metric: u₁(a1, a2) u2(a2, a1) for all a1, a2 € A₁ A2. Show that every
two-player symmetric game has a symmetric mixed Nash equilibrium, i.e. a
Nash equilibrium where both players choose the same mixed action.
=
=
Transcribed Image Text:A two-player static game is symmetric if the players have the same set of actions, i.e. A₁ = A2, and payoffs are sym- metric: u₁(a1, a2) u2(a2, a1) for all a1, a2 € A₁ A2. Show that every two-player symmetric game has a symmetric mixed Nash equilibrium, i.e. a Nash equilibrium where both players choose the same mixed action. = =
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