5、Sam has quasilinear preferences and his demand function for x is D§ = 15-p/3.The price of x is initially $15 per unit and increases to $24 per unit. Sam’s change is consumer surplus is the closest to: A、-168 B、-76 C、-27 D、75 答案:-76
6、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 + T > 100 B、T > 2S C、S < 0 and T > 100. D、S < T and T > 100. 答案:S<0 andt=“”>100.