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August 23, 2019 

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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.

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MERGER: The consolidation of two separately-owned businesses under single ownership. This can be accomplished through a mutual, "friendly" agreement by both parties, or through a "hostile takeover," in which one business gets ownership without cooperation from the other. Mergers fall into one of three classes -- (1) horizontal--two competing firms in the same industry that sell the same products, (2) vertical--two firms in different stages of the production of one good, such that the output of one business is the input of the other, and (3) conglomerate--two firms that are in totally, completely separated industries.

     See also | oligopoly | market structure | collusion | horizontal merger | vertical merger | conglomerate merger | antitrust laws | cartel | monopoly | competition |


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MERGER, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2019. [Accessed: August 23, 2019].


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ARC ELASTICITY

The average elasticity for discrete changes in two variables. The distinguishing characteristic of arc elasticity is that percentage changes are calculated based on the average of initial and ending values of each variable, rather than initial values. Arc elasticity is generally calculated using the midpoint elasticity formula. The contrast to arc elasticity is point elasticity. For infinitesimally small changes in two variables, arc elasticity is the same as point elasticity.

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Today, you are likely to spend a great deal of time browsing through a long list of dot com websites seeking to buy either a cell phone case or a pair of designer sunglasses. Be on the lookout for slow moving vehicles with darkened windows.
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