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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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AVERAGE FACTOR COST CURVE, PERFECT COMPETITION

A curve that graphically represents the relation between average factor cost incurred by a perfectly competitive firm for employing an input and the quantity of input used. Because average factor cost is essentially the price of the input, the average factor cost curve is also the supply curve for the input. The average factor cost curve for a perfectly competitive firm with no market control is horizontal. The average revenue curve for a firm with market control is positively sloped.

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Today, you are likely to spend a great deal of time flipping through the yellow pages wanting to buy either a wall poster commemorating the first day of spring or a lazy Susan for you dining room table. Be on the lookout for rusty deck screws.
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A half gallon milk jug holds about $50 in pennies.
"No amount of business school training or work experience can teach what is ultimately a matter of personal character. "

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