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A PRIORI: A presumption made before an analysis is undertaken, often based on experiences, beliefs, or deductions from seemingly self-evident propositions about how the world works. This is a Latin for assumption or axiom. A similar sounding, but opposite term is a posteriori, which is derived from observation or facts. For example, in the study of economics of crime you might assume, a priori, that people are basically "good", because that just seems to be part of human nature, and conclude, a posteriori, that people are more likely to commit crimes when the threat of capture and conviction is lower.
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MARGINAL PROPENSITY TO INVEST The change in business investment expenditures induced by a change in income or production (national income or gross domestic product). The marginal propensity to invest (abbreviated MPI) is another term for the slope of the investment line and is calculated as the change in investment divided by the change in income or production. The MPI plays a role in Keynesian economics. It augments the slope of the aggregate expenditures line and is part to the multiplier process. A related marginal measure is the marginal propensity to consume.
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PURPLE SMARPHIN
[What's This?]
Today, you are likely to spend a great deal of time lost in your local discount super center seeking to buy either a weathervane with a horse on top or a case of blank recordable DVDs. Be on the lookout for vindictive digital clocks with revenge on their minds.
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In the Middle Ages, pepper was used for bartering, and it was often more valuable and stable in value than gold.
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"Advice is like snow ‚ the softer it falls, the longer it dwells upon and the deeper it sinks into the mind. " -- Samuel Taylor Coleridge, poet
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AR(N)
A nth-order Autoregressive Process
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