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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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INTERCEPT, GOVERNMENT PURCHASES LINE

The intercept of the government purchases line indicates autonomous government purchases, government purchases that do not depend on the level of income or production. This can be thought of as government purchases that the government sector undertakes regardless of the state of the economy. Autonomous government purchases are affected by the government purchases determinants, which cause a change in the intercept and a shift of the government purchases line.

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Today, you are likely to spend a great deal of time searching for a specialty store seeking to buy either a package of 4 by 6 index cards, the ones with lines or a 50 foot extension cord. Be on the lookout for strangers with large satchels of used undergarments.
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A scripophilist is one who collects rare stock and bond certificates, usually from extinct companies.
"Never confuse a single defeat with a final defeat."

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