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PERFECT COMPETITION AND EFFICIENCY: Perfect competition is the idealized market structure that achieves an efficient allocation of resources. The conditions of perfect competition, including (1) large number of small firms, (2) identical products sold by all firms, (3) freedom of entry into and exit out of the industry, and (4) perfect knowledge of prices and technology, ensure that perfect competition efficiently allocates resources. This is in fact the purpose of perfect competition: a market structure that illustrates perfection, the best of all possible resource allocation worlds. The real world falls short of this perfection.

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MARGINAL REVENUE, MONOPOLY

The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a monopoly receives for selling an extra unit of output. It is found by dividing the change in total revenue by the change in the quantity of output. Marginal revenue is the slope of the total revenue curve and is one of two revenue concepts derived from total revenue. The other is average revenue. To maximize profit, a monopoly equates marginal revenue and marginal cost.

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BEIGE MUNDORTLE
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Today, you are likely to spend a great deal of time strolling around a discount warehouse buying club hoping to buy either one of those memory foam pillows or a remote controlled train set. Be on the lookout for telephone calls from long-lost relatives.
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In the late 1800s and early 1900s, almost 2 million children were employed as factory workers.
"What gets measured gets done."

-- Peter Drucker, educator

JRE
Journal of Regulatory Economics
A PEDestrian's Guide
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