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TIE-IN SALE: A type of sale in which consumers can buy one good only if they purchase another good as well. For example, if your grocery store sells you a bag of tea with the condition that you buy a pound of sugar, that would be a tie-in sale. Because they allow a monopoly to increase its profit over what it could make by selling the two goods separately at constant prices, tie-in sales can be used to price discriminate. However, it is important to realize that there are other reasons for tie-in sales other than price discrimination, such as to increase efficiency. For example, when we buy a car, it comes as a package of several goods (tires, engine, etc), which would be very difficult (and inefficient) for consumers to assemble if they were bought separately.
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MARGINAL REVENUE, PERFECT COMPETITION The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a perfectly competitive firm receives for selling an extra unit of output. It is found by dividing the change in total revenue by the change in the quantity of output. Marginal revenue is the slope of the total revenue curve and is one of two revenue concepts derived from total revenue. The other is average revenue. To maximize profit, a perfectly competitive firm equates marginal revenue and marginal cost.
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BLACK DISMALAPOD
[What's This?]
Today, you are likely to spend a great deal of time flipping through mail order catalogs looking to buy either clothing for your pet dog or an ink cartridge for your printer. Be on the lookout for spoiled cheese hiding under your bed hatching conspiracies against humanity.
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The 1909 Lincoln penny was the first U.S. coin with the likeness of a U.S. President.
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"It is the mark of an educated mind to be able to entertain a thought without accepting it." -- Aristotle
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MFN
Most-Favoured Nation
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