Which one of the following statements for a firm's equilibrium in Perfect Competition is not correct ?
- A.The market price must be greater or equal to average variable cost in the short run.
- B.The market price must be equal to marginal cost.
- C.The market price must be equal to average cost in the long run.
- D.The marginal cost decreases at the equilibrium output.
Show answer
This statement is not correct, because at the equilibrium of a competitive firm marginal cost must be rising. A firm in perfect competition is a price taker, so the price it gets equals its marginal revenue.
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