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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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HOUSEHOLD SECTOR

The aggregate macroeconomic sector that includes the entire wants and-needs-satisfying population of the economy. The primary economic role of the household sector is consumption. The share of gross domestic product purchased by the household sector is termed consumption expenditures. This is one of four macroeconomic sectors. The other three are business sector, government sector, and foreign sector.

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ORANGE REBELOON
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Today, you are likely to spend a great deal of time strolling through a department store trying to buy either a microwave over that won't burn your popcorn or a T-shirt commemorating the first day of winter. Be on the lookout for small children selling products door-to-door.
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There were no banks in colonial America before the U.S. Revolutionary War. Anyone seeking a loan did so from another individual.
"The only profit center is the customer."

-- Peter Drucker, educator

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