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Question

The long-run average costs at the efficient scale of production for 6 firms in a market are given below.

FirmLRACminA10B15C13D18E17F12

The market price fell from Rs 20 to Rs 15. As a result ________


A

the market supply curve shifts towards the left

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B

the market supply curve shifts towards the right

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C

there won't be any shift in the market supply curve

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D

none of these

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Solution

The correct option is A

the market supply curve shifts towards the left


When the market price falls from Rs 20 to Rs 15, firms D and E exit the market as the long run exits condition is met. As a result, the market supply curve shifts towards the left.

Note: We discussed that supply curve doesn't shift when price changes. This is true only in cases where there are a large number of sellers and their cost curves are similar. In most real markets with perfect competition, this is usually the case. The entry or exit of a few sellers does not have a marked impact on the supply curve.


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