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May 5, 2024 

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POINT ELASTICITY: The relatively responsiveness of a change in one variable (call it B) to an infinitesimally small change in another variable (call it A). The notion of point elasticity typically comes into play when discussing the elasticity at a specific point on a curve.< P>Point elasticity can be calculated in a number of different ways. Sophisticated economists, using sophisticated mathematical techniques (better known as calculus) can calculate point elasticity by taking derivatives of equations. Derivatives is fancy calculus talk for infinitesimally small changes.

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LERNER INDEX: The difference between price (p) and marginal cost (mc) as a fraction of price, that is [p-mc]/p. The Lerner index is usually taken as an indicator of market power because the larger the index, the larger the difference between price and marginal cost, that is, the larger the distance between the price and the competitive price. The Lerner index depends on the elasticity of demand. The Lerner index is also called the price-cost margin.

     See also | market power | monopoly | price | competitive market | price maker | price leadership | marginal-cost pricing | price-cost margin |


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MARGINAL FACTOR COST CURVE, MONOPSONY

A curve that graphically represents the relation between marginal factor cost incurred by a monopsony for hiring an input and the quantity of input employed. A profit-maximizing monopsony hires the quantity of input found at the intersection of the marginal factor cost curve and marginal revenue product curve. The marginal factor cost curve for a monopsony with market control is positively sloped and lies above the average factor cost curve.

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Today, you are likely to spend a great deal of time lost in your local discount super center trying to buy either a T-shirt commemorating last Friday (you know why) or a rotisserie oven that can also toast bread. Be on the lookout for bottles of barbeque sauce that act TOO innocent.
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Only 1% of the U.S. population paid income taxes when the income tax was established in 1914.
"Each of us is issued but one life, and we know full well how it all ends. It would be regrettable to squander this one chance on someone else's appearance, someone else's experience. "

-- Joseph Brodsky, Writer

MRP
Marginal Revenue Product
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