1) Consider the following two finite versions of the Cournot duopoly model where inverse demand is given by P=a -Q(Q=q1+q2 and a>Q> 0) and marginal cost is a constant c for each firm. First, suppose each firm must choose either half the monopoly quantity, qm/2 = (a- c)/4, or the Cournot equilibrium quantity, qe (a- c)3. No other quantity choices are feasible. Show that this two-action game is equivalent to the Prisoner's Dilemma: i) each firm has a strictly dominated strategy and ii) both firms are worse off in cquilibrium than they would be if they cooperated. (Hint: calculate each firm's payoff for possible outcome combinations)

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1) Consider the following two finite versions of the Cournot duopoly model where inverse demand
is given by P = a-Q (Q-q1 + q2 and a > Q> 0) and marginal cost is a constant c for each firm.
First, suppose each firm must choose either half the monopoly quantity, qm/2 = (a – c)/4, or the
Cournot equilibrium quantity, qe = (a - c)3. No other quantity choices are feasible. Show that this
two-action game is equivalent to the Prisoner's Dilemma: i) each firm has a strictly dominated
strategy and ii) both firms are worse off in qquilibrium than they would be if they
cooperated. (Hint: calculate each firm's payoff for possible outcome combinations)
Transcribed Image Text:1) Consider the following two finite versions of the Cournot duopoly model where inverse demand is given by P = a-Q (Q-q1 + q2 and a > Q> 0) and marginal cost is a constant c for each firm. First, suppose each firm must choose either half the monopoly quantity, qm/2 = (a – c)/4, or the Cournot equilibrium quantity, qe = (a - c)3. No other quantity choices are feasible. Show that this two-action game is equivalent to the Prisoner's Dilemma: i) each firm has a strictly dominated strategy and ii) both firms are worse off in qquilibrium than they would be if they cooperated. (Hint: calculate each firm's payoff for possible outcome combinations)
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