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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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SHORT-RUN AGGREGATE SUPPLY AND MARKET SUPPLY

The short-run aggregate supply curve, or SRAS curve, has similarities to, but differences from, the standard market supply curve. Both are positively sloped. Both relate price and quantity. However, the market supply curve is positively sloped due to the law of diminishing marginal returns and the short-run aggregate supply curve is positively-sloped due to inflexible prices, the pool of natural unemployment, and imbalances in real resource prices.

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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors wanting to buy either a how-to book on home repairs or a large, stuffed kitty cat. Be on the lookout for jovial bank tellers.
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The word "fiscal" is derived from a Latin word meaning "moneybag."
"In the long run men hit only what they aim at. "

-- Henry David Thoreau, philosopher

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