中级微观经济学（双语）章节测试课后答案2024春

第十八章测试

1. Monopoly always has constant elasticity demand.
A:错 B:对
答案:A
2.A game has two players. Each player has two possible strategies. One strategy is called “cooperate”, the other is called “defect”. Each player writes on a piece of paper either a C for cooperate or a D for defect. If both players write C; they both get a payoff of $100. If both players defect they each get a payoff of 0. If one player cooperates and the other player defects, the cooperating player gets a payoff of S and the defecting player gets a payoff of T . To defect will be a dominant strategy for both players if:
A:S < 0 and T > 100. B: T > 2S C:S < T and T > 100. D:S + T > 100 3.In the town of Torrelodones, each of the N > 2 inhabitants has $100. They are told that they can all voluntarily contribute to a fund that will be evenly divided among all residents. If $F are contributed to the fund, the local K-Mart will match the private contributions so that the total amount to be divided is $2F. That is, each resident will get back a payment of $2F/N when the fund is divided. If people in town care only about their own net incomes, in Nash equilibrium, how much will each person contribute to the fund?
A:$20 B:$50 C:$10 D:0 4.Big Pig and Little Pig have two possible strategies, Press the Button, and Wait at the　trough. If both pigs choose Wait, both get 2. If both pigs press the button then Big Pig gets 7 and Little Pig gets 3. If Little Pig presses the button and Big Pig waits at the trough, then Big Pig gets 10 and Little Pig gets 0. Finally, if Big Pig presses the button and Little Pig waits, then Big Pig gets 6 and Little Pig gets 1. In Nash equilibrium,        
A:Both pigs will wait at the trough.  B:The pigs must be using mixed strategies. C:Little Pig will get a payoff of 1 and Big Pig will get a payoff of 6. D:Little Pig will get a payoff of 3 and Big Pig will get a payoff of 7. 5.A famous Big Ten football coach had only two strategies. Run the ball to the left sideof the line. Run the ball to the right side. The defense can concentrate forces on the left side or the right side. If the opponent concentrates on the wrong side, his offense is sure to gain at least 5 yards. If the defense defended the left side and the offense ran left, it gain only 1 yard. If the opponent defended the right side when the offense ran right, the offense would still gain at least 5 yards with probability 0.70. It is the last play of the game and the famous coach's team is on offense. If it makes 5 yards or more it wins, if not it loses. Both sides choose Nash equilibrium strategies. In equilibrium the offense:
A:will run to the right side with probability 0.87. B:is sure to run to the right side. C:will run to the two sides with equal probability. D:will run to the right side with probability 0.77. 6.A situation where everyone is playing a dominant strategy must be a Nash equilibrium.
A:对 B:错 7.In a Nash equilibrium, everyone must be playing a dominant strategy
A:对 B:错 8.In the prisoners' dilemma game, if each prisoner believed that the other prisoner would deny the crime, then both would deny the crime.
A:错 B:对 9.A general has the two possible pure strategies, sending all of his troops by land or all of his troops by sea. An example of a mixed strategy is where he sends 1=4 of his troops by land and 3=4 of his troops by sea.
A:对 B:错 10.In Nash equilibrium, each player is making an optimal choice for herself, given the choices of the other players
A:对 B:错