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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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DEMAND The willingness and ability to buy a range of quantities of a good at a range of prices, during a given time period. Demand is an inverse relation between price (demand price) and quantity (quantity demanded). Demand is one half of the market exchange process--the other is supply. This demand side of the market draws inspiration from the unlimited wants and needs dimension of the scarcity problem.
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BLUE PLACIDOLA
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Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius seeking to buy either a square lamp shade with frills along the bottom or an electric coffee pot with automatic shutoff. Be on the lookout for crowded shopping malls.
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The first U.S. fire insurance company was established by Benjamin Franklin in 1752 in Philadelphia.
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"Success is where preparation and opportunity meet." -- Bobby Unser, Race car driver
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SIPP
Survey of Income and Program Participation
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