Econ by Dummies

Monopolistic Competition

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Monopolistic Competition is characterized by a large number of sellers, differentiated products and easy entry and exit to and from the industry.

By producing at MR=MC the monopolistic competitor maximizes profits. The economic profit causes new firms to enter which diminishes economic profit over time. Demand is higher than the output price and the ATC so an economic profit is realized.

Short Run Profit Maximization
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When demand or price is lower than AVC when MC=MR, the firm will shut down. The firm incurs smaller loses by shutting down instead of producing at ATC. 

Short Run Shut Down
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In the long run, the minimum ATC curve will touch the Demand curve at the output where MR=MC.

Long Run Break Even
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Losses are occuring because the ATC curve is above the Demand curve. The firm's product price does not cover the minimum ATC.

Short Run Loss
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By Chantel McCain, Ross McFarland, Iz Altman