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MARGINAL COST: The change in total cost (or total variable cost) resulting from a change in the quantity of output produced by a firm in the short run. Marginal cost indicates how much total cost changes for a give change in the quantity of output. Because changes in total cost are matched by changes in total variable cost in the short run (remember total fixed cost is fixed), marginal cost is the change in either total cost or total variable cost. Marginal cost, usually abbreviated MC, is found by dividing the change in total cost (or total variable cost) by the change in output.

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BUSINESS SECTOR

The aggregate macroeconomic sector that contains the private, profit-seeking firms in the economy that combine scarce resources into the production of wants-and-needs satisfying goods and services. The primary economic function of the business sector is the production of goods and services. The three basic types of business organizations that comprise the business sector are proprietorship, partnership, and corporation. This is one of the four macroeconomic sectors. The other three are household sector, government sector, and foreign sector.

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Today, you are likely to spend a great deal of time looking for a downtown retail store hoping to buy either a birthday greeting card for your mother that doesn't look like a greeting card or a handcrafted spice rack. Be on the lookout for pencil sharpeners with an attitude.
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John Maynard Keynes was born the same year Karl Marx died.
"There is a way to look at the past. Don't hide from it. It will not catch you - if you don't repeat it."

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