Problem
1. Explain why P = MC in the short-run equilibrium of the perfectly competitive firm, whereas in long-run equilibrium P = MC = AC.
2. Explain why it is not sensible to close a business firm if it earns zero economic profits.
3. If the firm's lowest average cost is $52 and the corresponding average variable cost is $26, what does it pay a perfectly competitive firm to do if
a. The market price is $51?
b. The price is $36?
c. The price is $12?
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.