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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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MARKET EQUILIBRIUM, GRAPHICAL ANALYSIS

An analysis of market equilibrium using a graph that combines a demand curve and a supply curve. A graphical analysis of the market is used to ascertain information such as market equilibrium, equilibrium price, equilibrium quantity, shortage, and surplus. This is one of two basic methods of analyzing market equilibrium. The other is a numerical analysis using demand and supply schedules.

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Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius looking to buy either a pleather CD case or a how-to book on fine dining. Be on the lookout for cardboard boxes.
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In 1914, Ford paid workers who were age 22 or older $5 per day -- double the average wage offered by other car factories.
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