Exercise 2 - Entry with sunk costs and Cournot competition Consider two firms, 1 and 2, selling a homogeneous good with market demand p=1- Q, with Q=q1+q2 being the aggregate quantity. They are both considering entering the market. To do so, they would have to pay a fixed entry cost f<1/4. Firm 1 has marginal cost c1 (with 0

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Exercise 2 - Entry with sunk costs and Cournot competition
Consider two firms, 1 and 2, selling a homogeneous good with market demand p=1-
Q, with Q=q1+q2 being the aggregate quantity.
They are both considering entering the market. To do so, they would have to pay a
fixed entry cost f<1/4. Firm 1 has marginal cost c1 (with 0<ci<1/2) and firm 2 has
marginal cost c2=0.
The game is as follows. At stage 1, Firms 1 and 2 decide simultaneously whether to
enter or not, and if they do they have to pay the fixed sunk cost f.
At stage 2, Active firms decide the quantities qi (i=1,2) they want to bring to the
market.
Q1) Find the sub-game perfect Nash equilibrium solutions of the game.
Q2) Discuss the role of sunk costs, and the role of the cost difference.
Q3) Is it possible to have an equilibrium where the less efficient firm 1 enters and
the more efficient firm 2 stays out? Why?
Transcribed Image Text:Exercise 2 - Entry with sunk costs and Cournot competition Consider two firms, 1 and 2, selling a homogeneous good with market demand p=1- Q, with Q=q1+q2 being the aggregate quantity. They are both considering entering the market. To do so, they would have to pay a fixed entry cost f<1/4. Firm 1 has marginal cost c1 (with 0<ci<1/2) and firm 2 has marginal cost c2=0. The game is as follows. At stage 1, Firms 1 and 2 decide simultaneously whether to enter or not, and if they do they have to pay the fixed sunk cost f. At stage 2, Active firms decide the quantities qi (i=1,2) they want to bring to the market. Q1) Find the sub-game perfect Nash equilibrium solutions of the game. Q2) Discuss the role of sunk costs, and the role of the cost difference. Q3) Is it possible to have an equilibrium where the less efficient firm 1 enters and the more efficient firm 2 stays out? Why?
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