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SAVING FUNCTION: The positive relation between household saving and household disposable income. The saving function is commonly presented as the saving line or propensity-to-saving line. The slope of this line is the marginal propensity to save, which is the proportion of any additional income used for saving. The saving function and the marginal propensity to saving play key roles in the multiplier and accelerator concepts. Because consumption is the difference between disposable income and saving, the consumption function is a complementary relation to the saving function.

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MARGINAL COST AND LAW OF DIMINISHING MARGINAL RETURNS

Decreasing then increasing marginal cost, reflected by a U-shaped marginal cost curve, is the result of increasing then decreasing marginal returns. In particular the decreasing marginal returns is caused by the law of diminishing marginal returns. As such, the law of diminishing marginal returns affects not only the short-run production of a firm but also the cost of short-run production. This translates into a positively-sloped supply curve for profit-maximizing competitive firms.

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PINK FADFLY
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Today, you are likely to spend a great deal of time looking for a downtown retail store trying to buy either several magazines on home repairs or a remote controlled sports car with an air spoiler. Be on the lookout for small children selling products door-to-door.
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In the late 1800s and early 1900s, almost 2 million children were employed as factory workers.
"If we all did the things we are capable of doing, we would literally astound ourselves."

-- Thomas Edison

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