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We will examine firms that operate in a market structure called monopolistic competition.
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Monopolyistic competition is, as its name suggests, kind of a combination of perfect competition and monopoly.
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Let's take a look at how these firms do or do not achieve allocative efficiency and productive efficiency.
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Imagine firms that are selling identical products, and they're basically operating as perfectly competitive firms.
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They are constrained as price takers to take the price that the market sets as given.
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Now, these firms suppose want to earn more than normal profits.
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They start to differentiate their products.
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They invest in advertising or brand loyalty, and they are able to achieve some market power.
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As such, their profit maximizing decision making leads to an output level that is not allocatively efficient.
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Recall, allocative efficiency exists when the output is such that, that is production is at some level, such that the price is equal to the marginal cost...