1. Suppose a purely competitive firm was making a profit (or loss) in the short run. As they move into the long run, what happens? Explain thd process fully with graphs.
2. What is the purely competitive firm's short run supply curve? (Use a graph and explain what you are depicting).
1)
Purely competitive firm can earn profits in short run but in long run, competitive firm can not earn abnormal profit.
Accruing of abnormal profits in short run leads to the entry more firms in search of profits and influx of new firms increases supply which drags down price and ultimately firms get only zero economic profit. Inefficient firms leave market.
Following is diagram:
In above diagram, increase in number of firms in market causes rise in supply and its shifts to right thereby leading to fall in price and increase in quantity supplied.
Now equilibrium is established where P = ATC=MC=MR=AR
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