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Problem 1 In a repeated, symmetric duopoly the payoff to both firms is P; if they produce the level of output that maximizes their joint

Problem 1

In a repeated, symmetric duopoly the payoff to both firms is P; if they produce the level of output that maximizes their joint profits and Pc if they produce the Cournot level of output. The maximum payoff that one player can get if the other chooses the joint profit-maximizing output is Pd. Obviously, we assume that Pd > Pj > Pc

1. Represent a one-stage game of this duopoly in a bi-matrix (normal form).

2. Determine the Nash equilibrium (if any) in pure strategies of the one-stage game.

3. Assume the game is repeated 100 times. Determine the subgame perfect equilibrium (if any) in pure strategies of the repeated game.

4. Assume the game is repeated infinitely, and the discount factor is 1/(1+r), where r is the discount rate. The firms adopt the punishment strategy of reverting to the Cournot game if either firm defects from the joint profit-maximizing strategy. o How large can r be for the punishment strategy to be a sub-game perfect equilibrium in pure strategies?

Economics Game Theory class. thanks answer please questions 1 to 4

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