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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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PERSONAL TAX AND NONTAX PAYMENTS

The official item in the National Income and Product Accounts maintained by the Bureau of Economics Analysis measuring the personal income taxes paid to the government sector on personal income received by the household sector. Personal tax and nontax payments are subtracted from personal income (PI) to calculate disposable income (DI). Personal tax and nontax payments are about 15 percent of personal income and about 13 percent of gross domestic product.

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Today, you are likely to spend a great deal of time wandering around the downtown area hoping to buy either a green fountain pen or a handcrafted bird house. Be on the lookout for the happiest person in the room.
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More money is spent on gardening than on any other hobby.
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Marginal Propensity to Invest
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