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ARC ELASTICITY: The average elasticity for discrete changes in two variables, A and B. The distinguishing characteristic of arc elasticity is that percentage changes are calculated based on the average of the initial and ending values of each variable, rather than only initial values. Arc elasticity is generally calculated using the midpoint formula. Arc elasticity should be compared with point elasticity. For infinitesimally small changes in variables A and B, arc elasticity is the same as point elasticity.

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NATIONAL INCOME AND PRODUCT ACCOUNTS

The official government system of collecting, processing, and reporting assorted production and income measures used to track aggregate activity in the macroeconomy. This system of accounts, maintained by the Bureau of Economic Analysis in the Department of Commerce, is the source of official estimates of gross domestic product, net domestic product, national income, personal income, disposable income, gross national product, and related measures.

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APLS

BEIGE MUNDORTLE
[What's This?]

Today, you are likely to spend a great deal of time searching the newspaper want ads hoping to buy either a blue mechanical pencil or super soft, super cuddly, stuffed animals. Be on the lookout for telephone calls from long-lost relatives.
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Two and a half gallons of oil are needed to produce one automobile tire.
"When we do the best we can, we never know what miracle is wrought in our life or in the life of another. "

-- Helen Keller, lecturer, author

LRAC
Long Run Average Cost
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