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MARGINAL PROPENSITY TO SAVE: The proportion of each additional dollar of household income that is used for saving. Or alternatively, this is the change in saving due to a change in disposable income. Abbreviated MPS, the marginal propensity to save is the slope of the saving or propensity-to-save line. It also takes center stage for the multiplier effect. In particular, the inverse of the MPS is the simple expenditure multiplier. The sum of the marginal propensity to save and the related concept, the marginal propensity to consume, is equal to one.
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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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PINK FADFLY
[What's This?]
Today, you are likely to spend a great deal of time flipping through the yellow pages hoping to buy either a handcrafted bird house or a weathervane with a chicken on top. Be on the lookout for spoiled cheese hiding under your bed hatching conspiracies against humanity.
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Post WWI induced hyperinflation in German in the early 1900s raised prices by 726 million times from 1918 to 1923.
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"Difficulty is the excuse history never accepts. " -- Edward R. Murrow, News broadcaster
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ICTB
International Customs Tariffs Bureau
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