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LRAC: The abbreviation for long-run average cost, which is the per unit cost of producing a good or service in the long run when all inputs are variable. In other words, long-run total cost divided by the quantity of output produced. Long-run average cost is based on economies of scale (or increasing returns to scale) and diseconomies of scale (or decreasing returns to scale).

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ACCELERATOR: The ratio between investment expenditures and the change in gross domestic product. This is based on the notion that business investment depends on the rate of growth of aggregate output. If the economy is expanding, in other words, then the business sector invests in more capital goods to produce the extra output needed. This accelerator effect modifies and magnifies the simply multiplier effect based on the induced consumption and the marginal propensity to consume.

     See also | Keynesian economics | marginal efficiency of investment | multiplier | investment expenditure | gross domestic product | induced investment | marginal propensity to consume |


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EXPLICIT COST

An opportunity cost that involves a monetary payment or some other form of compensation. The monetary payment is generally made to compensate the person who initially foregoes the satisfaction. This payment, in effect, transfers the burden of the opportunity cost from the original person to the one making payment. Explicit cost is also commonly termed out-of-pocket or accounting cost, and occasionally explicit opportunity cost.

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Today, you are likely to spend a great deal of time wandering around the downtown area looking to buy either a remote controlled sports car with an air spoiler or semi-gloss photo paper that works with your neighbor's printer. Be on the lookout for celebrities who speak directly to you through your television.
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Only 1% of the U.S. population paid income taxes when the income tax was established in 1914.
"The true idealist pursues what his heart says is right in a way that his head says will work. "

-- Richard Nixon, 37th US president

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