Long run price and output under perfect competition

The Long Run Adjustment Process

If most firms are making abnormal profits in the short run there will be an expansion of the output of existing firms and we expect to see the entry of new firms into the industry. Firms are responding to the profit motive and supernormal profits act as a signal for a reallocation of resources within the market. The addition of new suppliers causes an outward shift in the market supply curve. This is shown in the diagram below.

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~ by sentinel007 on January 3, 2010.

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