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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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FEDERAL FUNDS RATE

The interest rate charged by one commercial bank or depository institution for lending Federal Reserve deposits to another commercial bank or depository institution. This is the interest rate determined in the Federal funds market. The Federal funds rate is a key interest rate for both the banking system and the macroeconomy. It is often targeted by monetary policy and is a benchmark used to determine other interest rates in the economy.

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Today, you are likely to spend a great deal of time at a crowded estate auction looking to buy either an ink cartridge for your printer or a rechargeable battery for your camera. Be on the lookout for fairy dust that tastes like salt.
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In the early 1900s around 300 automobile companies operated in the United States.
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