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PI: The abbreviation for personal income, which is the total income received by the members of the domestic household sector, which may or may not be earned from productive activities during a given period of time, usually one year. Personal income is one of three measures of income reported quarterly (every three months) in the National Income and Product Accounts maintained by the Bureau of Economic Analysis.

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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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GREEN LOGIGUIN
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Today, you are likely to spend a great deal of time watching the shopping channel hoping to buy either decorative garden figurines or a wall poster commemorating last Friday (you know why). Be on the lookout for mail order catalogs with hidden messages.
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The earliest known use of paper currency was about 1270 in China during the rule of Kubla Khan.
"I've always believed that if you put in the work, the results will come. I don't do things half-heartedly. Because I know if I do, then I can expect half-hearted results. "

-- Michael Jordan, basketball player

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