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CETERIS PARIBUS: A Latin term meaning that all other factors are held unchanged. The ceteris paribus assumption is used to isolate the effect one economic factor has on another. Without this assumption, it would be difficult to determine cause and effect in the economy. Relaxing the ceteris paribus assumption is the primary analytical technique used in the study of economics, especially when analyzing the market. Much like a chemist adds one chemical at a time to a mixture to determine the resulting reaction, an economist relaxes one ceteris paribus assumption at a time to observe the results.

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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 (MC) indicates how much total cost changes for a given change in the quantity of output. Because changes in total cost are matched by changes in total variable cost in the short run (total fixed cost is fixed), marginal cost is the change in either total cost or total variable cost. It is found by dividing the change in total cost (or total variable cost) by the change in output. Marginal cost is one of four cost concepts used in short-run production analysis. The other three are average total cost, average fixed cost, and average variable cost.

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Today, you are likely to spend a great deal of time at a garage sale seeking to buy either a birthday greeting card for your grandmother or a coffee cup commemorating yesterday. Be on the lookout for the happiest person in the room.
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Junk bonds are so called because they have a better than 50% chance of default, carrying a Standard & Poor's rating of CC or lower.
"I don't subscribe to the thesis, 'Let the buyer beware,' I prefer the disregarded one that goes, 'Let the seller be honest.'"

-- Isaac Asimov, Author

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