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MARGINAL REVENUE, PERFECT COMPETITION: The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a perfectly competitive firm 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 perfectly competitive firm equates marginal revenue and marginal cost.

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AGGREGATE DEMAND DECREASE, LONG-RUN AGGREGATE MARKET

A shock to the long-run aggregate market caused by a decrease in aggregate demand resulting in and illustrated by a leftward shift of the aggregate demand curve. A decrease in aggregate demand in the long-run aggregate market results in an increase in the price level but no change in real production. The level of real production resulting from the aggregate demand shock is full-employment real production.

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Today, you are likely to spend a great deal of time at a crowded estate auction hoping to buy either clothing for your kitty cats or a set of luggage without wheels. Be on the lookout for door-to-door salesmen.
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Only 1% of the U.S. population paid income taxes when the income tax was established in 1914.
"Learn to enjoy every minute of your life. Be happy now. Don't wait for something outside of yourself to make you happy in the future. Think how really precious is the time you have to spend, whether it's at work or with your family. Every minuteshould be enjoyed and savored."

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General Agreementon Tariffs and Trade
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