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OKUN'S LAW: A relationship that says that the gap between actual and full employment output level of gross domestic product widens by 3.0% for each percentage point increase in the unemployment rate. When Arthur Okun discovered this empirical relationship he was on President Kennedy's Council of Economic Advisers (CEA). Okun cautioned that the relationship was valid only within unemployment rates of 3% and 7.5%.

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AVERAGE-MARGINAL RULE: An intriguing, extremely useful mathematical relationship between an average measure and it's corresponding marginal measure, for example average product and marginal product, or average total cost and marginal cost. When the marginal measure is greater than the average measure, then the average measure increases. Alternatively, when the marginal measure is less than the average measure, then the average measure decreases. In addition, when the marginal measure is equal to the average measure the average measure doesn't change.

     See also | average product | marginal product | average total cost | average variable cost | marginal cost | average revenue | marginal revenue | average factor cost | marginal factor cost | average revenue product | marginal revenue product |


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MARGINAL PRODUCT CURVE

A curve that graphically illustrates the relation between marginal product and the quantity of the variable input, holding all other inputs fixed. This curve indicates the incremental change in output at each level of a variable input. The marginal product curve is one of three related curves used in the analysis of the short-run production of a firm. The other two are total product curve and average product curve. The marginal product curve plays in key role in the economic analysis of short-run production by a firm.

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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 rechargeable battery for your computer or shoe laces for your snow boots. Be on the lookout for high interest rates.
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Parker Brothers, the folks who produce the Monopoly board game, prints more Monopoly money each year than real currency printed by the U.S. government.
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