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Question 4
This is about a dominated oligopolistic market. Consider a dominant firm D with large market share and three fringe firms F with small market share. Dominant firm D is the price setter and three fringe firms F are price followers in the market. Market demand is Q(P)=10,000-P and the supply of three fringe firms is Q(P)=P-6,000.

【題組】(b) Suppose marginal cost of dominant firm is MC_d=5,000. Find market price P= _______ the output of dominant firm Q_d= _______ and the output of fringe firms Q_s= _______
【題組】 (a) Find the demand of dominant firm Dd= _______
Question 3
Consider a duopoly market. Firm's cost is C(q_i)= 0.28qi；and Q(P)=1,000-1,000P. Answer the following questions.

【題組】(c) Suppose that firm 1 is a quantity setter and firm 2 is a quantity follower (Stackelberg competition). Calculate firm 1's output q₁= _______ and profit π₁= _______
40. In the above table. If investment were to increase by $26 to a level of $51 then equilibrium expenditure will ______. (A)increase by $25. (B)decrease by $100. (C) increase by $100. (D) decrease by $50.
39. In the above table, what is the equilibrium expenditure? (A)$200 (B)$1,000 (C) $500 (D) $700
38. In the above table, what is the unplanned inventory change when GDP is equal to $400? (A)$26 (B)-$5 (C) -$26 (D) $5

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