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MARGINAL PROPENSITY TO INVEST: The proportion of each additional dollar of national income that is used for investment expenditures. Or alternatively, this is the change in investment expenditures due to a change in national income. Abbreviated MPI, the marginal propensity to invest is the slope of the investment line used in the analysis of Keynesian economics. As such, it also plays a role in the slope of the aggregate expenditure line and the multiplier effect.
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PRODUCT LIFE CYCLE The different stages that a product traverses over the course of its life from initial availability (birth) to eventual unavailability (death). The key stages are development, introduction, growth, maturity, saturation, and decline. The product life cycle, represented by an S-shaped curve, is an adaptation of the biological life cycle and is common to the study of marketing. It is also important in the analysis of innovation and economic instability. In addition to biological growth, comparable S-shaped life cycles are found in short-run production of a firm, the growth of a person's income, the acquisition of knowledge, and the development of a civilization.
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PURPLE SMARPHIN
[What's This?]
Today, you are likely to spend a great deal of time searching for rummage sales seeking to buy either a dozen high trajectory optic orange golf balls or a large red and white striped beach towel. Be on the lookout for florescent light bulbs that hum folk songs from the sixties.
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In the early 1900s around 300 automobile companies operated in the United States.
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"Never confuse a single defeat with a final defeat." -- F. Scott Fitzgerald, writer
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M
Imports
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