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MARGINAL REVENUE: The change in total revenue resulting from a change in the quantity of output sold. For a perfectly competitive firm, marginal revenue is equal to price.

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PERFECT COMPETITION, LONG-RUN ADJUSTMENT

A perfectly competitive industry undertakes a two-part adjustment to equilibrium in the long run. One is the adjustment of each perfectly competitive firm to the appropriate factory size that maximizes long-run profit. The other is the entry of firms into the industry or exit of firms out of the industry, to eliminate economic profit or economic loss. The end result of this long-run adjustment is a multi-faceted equilibrium condition that price is equal to marginal cost and average cost (both short run and long run).

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Today, you are likely to spend a great deal of time looking for the new strip mall out on the highway wanting to buy either a T-shirt commemorating the first day of spring or a coffee cup commemorating last Friday (you know why). Be on the lookout for gnomes hiding in cypress trees.
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A half gallon milk jug holds about $50 in pennies.
"Success is going from failure to failure without a loss of enthusiasm. "

-- Winston Churchill, British statesman

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