The short-run industry supply curve for a perfectly competitive industry is the sum of the marginal cost curves above average variable cost for all firms in the industry.

True

Explanation:

The short run supply curve for a perfectly competitive firm is its marginal cost curve above the average variable cost curve, therefore the short run supply curve for the entire industry should equal the horizontal addition of individual firm's marginal cost curves above their average variable costs.

true basically. have an awesome day ya'll.

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