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SLOPE, INVESTMENT LINE: The positive slope of the investment line is also termed the marginal propensity to invest (MPI). This slope is greater than zero but less than one, reflecting induced investment. The slope of the investment line affects the slope of the aggregate expenditures line and thus also affects the magnitude of the multiplier process.

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PRODUCTION STAGES

The three stages of production are characterized by the slopes, shapes, and interrelationships of the total, marginal, and average product curves. The first stage is characterized by a positive slope of the average product curve, ending at the intersection between the average product and marginal product curves; the second stage by continues up to the point in which the marginal product becomes negative, at the peak of the total product curve; and the third stage exists over the range of in which the total product curve is negatively sloped. In Stage I, average product is positive and increasing. In Stage II, marginal product is positive, but decreasing. And in Stage III, total product is decreasing.

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Today, you are likely to spend a great deal of time going from convenience store to convenience store 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 letters from the Internal Revenue Service.
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A U.S. dime has 118 groves around its edge, one fewer than a U.S. quarter.
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PVR
Profit Volume Ratio
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