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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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ARC ELASTICITY

The average elasticity for discrete changes in two variables. The distinguishing characteristic of arc elasticity is that percentage changes are calculated based on the average of initial and ending values of each variable, rather than initial values. Arc elasticity is generally calculated using the midpoint elasticity formula. The contrast to arc elasticity is point elasticity. For infinitesimally small changes in two variables, arc elasticity is the same as point elasticity.

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Today, you are likely to spend a great deal of time looking for a downtown retail store looking to buy either a how-to book on meeting people or clothing for your pet iguana. Be on the lookout for neighborhood pets, especially belligerent parrots.
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Mark Twain said "I wonder how much it would take to buy soap buble if there was only one in the world."
"Habit is a cable; we weave a thread of it each day, and at last we cannot break it. "

-- Horace Mann, educator

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