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LONG-RUN AVERAGE COST CURVE: A curve depicting the per unit cost of producing a good or service in the long run when all inputs are variable. The long-run average cost curve (usually abbreviated LRAC) can be derived in two ways. On is to plot long-run average cost, which is, long-run total cost divided by the quantity of output produced. at different output levels. The more common method, however, is as an envelope of an infinite number of short-run average total cost curves. Such an envelope is base on identifying the point on each short-run average total cost curve that provides the lowest possible average cost for each quantity of output. The long-run average cost curve is U-shaped, reflecting economies of scale (or increasing returns to scale) when negatively-sloped and diseconomies of scale (or decreasing returns to scale) when positively sloped. The minimum point (or range) on the LRAC curve is the minimum efficient scale.
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CHANGE IN AGGREGATE SUPPLY A shift of the short-run or long-run aggregate supply curve caused by a change in one of the aggregate supply determinants. In essence, a change in aggregate supply is caused by any factor affecting supply EXCEPT the price level. This is one of two changes related to aggregate supply. The other is a change in real production. A change in aggregate supply is comparable to a change in market supply.
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BLACK DISMALAPOD
[What's This?]
Today, you are likely to spend a great deal of time wandering around the shopping mall seeking to buy either a wall poster commemorating the 2000 Olympics or a flower arrangement with a lot of roses for your grandmother. Be on the lookout for small children selling products door-to-door.
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On a typical day, the United States Mint produces over $1 million worth of dimes.
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"Do you want to be safe and good, or do you want to take a chance and be great?" -- Jimmy Johnson, Football Coach
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WLS
Weighted Least Squares
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