The average avoidable cost for a fringe firm is AAC(q) = 20/q +5q. The marginal cost function for a fringe firm is MC = 10q. There are 10 fringe firms. The marginal cost of the dominant firm is 2 and the demand function is Q = 100 − P. What is the supply function of the fringe? What is p0, the minimum price at which the fringe will supply? What is the residual demand function for the dominant firm? What is the profit-maximizing price of the dominant firm? Compare monopoly profits to the profits of the dominant firm. Which market structure is socially preferable, dominant firm or monopoly? Why?

A dominant or price setting firm and several smaller price takers serve a market where total market demand is Qd = 700 – 3P and the combined supply from all the smaller firms is Qs = - 20 + 2P. State the dominant firm’s marginal revenue function (MRf), and use it to determine its profit maximizing quantity and the price (P) it will set for the market if MC = $56.

Feedback Imagine that the flat-screen TV market is made up of one large firm that leads the industry and sets its own price first, and another firm that follows the leader when deciding its own profit-maximizing strategy. The leader has a cost function of c₁ (91) = 5q1, and the follower has a cost function of CF (ar) = 4, where Q =q₁ + qr. Total market demand for flat-screen TVs is given by the function Q = 250.00-2p. Calculate the following values: Leading firm's production: q = Follower firm's production: qp = Equilibrium price: p= $49.37 9 OF 16 QUESTIONS COMPLETED 118.33 32.92 (Round to two decimals if necessary.) (Round to two decimals if necessary.) (Round to two decimals if necessary.) See Hint 4 VIEW SOLUTION SUBMIT ANSWER

A market consists of a dominant firm and a number of fringe firms. The followings are the information about these firms. Total market demand: QALL=300 – (2.5) P The competitive fringe supply function (total): QF=2P-12 The dominant firms marginal cost function: MC = 12 + (1⁄2) QD.  a) What is the equilibrium price set by the dominant firm?  b) How much will the competitive fringe supply to the market at the price found in question (a)?        Show the answers graphically.

a and b