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PERFECT COMPETITION AND SHORT-RUN SUPPLY CURVE: A perfectly competitive firm's supply curve is that portion of its' marginal cost curve that lies above the minimum of the average variable cost curve. A perfectly competitive firm maximizes profit by producing the quantity of output that equates price and marginal cost. As such, the firm moves along it's marginal cost curve in response to alternative prices. Because the marginal cost curve is positively sloped due to the law of diminishing marginal returns, the firm's supply curve is also positively sloped.

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EXCHANGE RATES, AGGREGATE DEMAND DETERMINANT

One of several specific aggregate demand determinants assumed constant when the aggregate demand curve is constructed, and that shifts the aggregate demand curve when it changes. An increase in exchanges rates causes an increase (rightward shift) of the aggregate curve. A decrease in the exchanges rates causes a decrease (leftward shift) of the aggregate curve. Other notable aggregate demand determinants include interest rates, the money supply, inflationary expectations, consumer confidence, and the federal deficit.

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Today, you are likely to spend a great deal of time at a going out of business sale looking to buy either a small, foam rubber football or an instructional DVD on learning to the play the oboe. Be on the lookout for cardboard boxes.
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The earliest known use of paper currency was about 1270 in China during the rule of Kubla Khan.
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