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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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TAX EFFECTS

The primary reason that governments collect taxes from members of society is to finance government operations and provide public goods. However, taxes also create disincentives to engage in the taxed activity, which causes a change in the allocation of resources. This two consequences of taxes are summarized in two essential tax effects -- the revenue effect and the allocation effect. While all taxes have both, the key to effective government is minimize the allocation effect if the goal is to generate revenue and to minimize the revenue effect if the goal is to change the allocation of resources.

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Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius wanting to buy either an instructional DVD on learning to the play the oboe or a small, foam rubber football. Be on the lookout for neighborhood pets, especially belligerent parrots.
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Paper money used by the Commonwealth of Massachusetts prior to the U.S. Revolutionary War, which was issued against the dictates of Britain, was designed by patriot and silversmith, Paul Revere.
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