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March 22, 2023 

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HERFINDAHL INDEX: A measure of concentration of the production in an industry that's calculated as the sum of the squares of market shares for each firm. This is an alternative method of summarizing the degree to which an industry is oligopolistic and the relative concentration of market power held by the largest firms in the industry. The Herfindahl index gives a better indication of the relative market control of the largest firms than can be found with the four-firm and eight-firm concentration ratios.

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

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


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PRICE-COST MARGIN, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2023. [Accessed: March 22, 2023].


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FEDERAL FUNDS MARKET

A financial market used by commercial banks and other depository institutions regulated by the Federal Reserve System to lend and borrow Federal funds (Federal Reserve deposits). The interest rate charged for lending through the Federal funds market is the Federal funds rate.

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Today, you are likely to spend a great deal of time browsing about a thrift store hoping to buy either a set of steel-belted radial snow tires or a wall poster commemorating the 2000 Presidential election. Be on the lookout for crowded shopping malls.
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