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DECLINE STAGE: The final stage of the product life cycle, characterized by a drastic drop off in profits. A company needs to decide how long to continue to support a product during this stage. Advertising and promotion can help maintain sales for a period of time. Ultimately, the cost-benefit tradeoff forces the business to discontinue the manufacturing of a product in this stage. Sometimes this happens quite rapidly and in some cases the product continues in this stage for many years.

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SAVING-INVESTMENT MODEL

A variation of the Keynesian injections-leakages model that includes the two private sectors, the household sector and the business sector. This variation, more formally termed the two-sector injections-leakages model, captures the interaction between induced saving (and indirectly induced consumption expenditures) and autonomous investment expenditures. This model provides an alternative to the two-sector aggregate expenditures (Keynesian cross) analysis of the macroeconomy, including equilibrium, disequilibrium, and the multiplier. Equilibrium is identified as the intersection between the saving line and the investment line. Two related variations are the three-sector injections-leakages model and the four-sector injections-leakages model.

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WHITE GULLIBON
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Today, you are likely to spend a great deal of time touring the new suburban shopping complex trying to buy either a coffee table shaped like the state of Florida or storage boxes for your summer clothes. Be on the lookout for vindictive digital clocks with revenge on their minds.
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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court!
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Weak Axiom of Profit Maximization
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