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Short-run and long-run average cost curves cannot be U-shaped under constant return to scale. True or...

  1. Short-run and long-run average cost curves cannot be U-shaped under constant return to scale. True or false. Explain your answer intuitively with the help of one graph.

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Answer #1

True

Reason: Constant returns to scale occurs when an increase in the inputs used lead to a proportionate increase in output. This means as production cost increases, sales also increase proportionally.

This situation gives rise to a horizontal shaped straight-line AC curve in the short run and long run.

This is because as inputs increase, cost of production will increase. But, an increase in cost of production will be accompanied by proportionate increase in output, Q. That is, AC = TC/Q will remain unchanged, since TC and Q will increase proportionately in this case.

This gives rise to a flat, horizontal AC curve in both short and long run.

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