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Cost curves, profits/losses, and long-run equilibrium: a. Draw typical short run average cost and marginal cost...

Cost curves, profits/losses, and long-run equilibrium:

a. Draw typical short run average cost and marginal cost curves for a firm (costs on the vertical axis, q on the horizontal axis), such that marginal cost = average cost= 6 at q=10.

b. Suppose this firm operates as a perfect competitor in a market with a short run equilibrium price of $5. Illustrate on your graph the area indicating the short run profit or loss experienced by this firm, given the cost curves in part (a) and this price.

c. Assume all firms in this industry face these same costs, and assume that this is a “constant costs”industry. What can you say about the long-run equilibrium price in this industry? What can you say about long-run firm-level output?

d. How would your answer to (c) be different if this were an increasing costs industry?

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