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COMPETITION ALONG A LINE: A basic analysis of location theory that demonstrates how and why competing firms tend to locate next to each other. This analysis indicates that as firms attempt to attract customers from each other, they edge increasingly closer. In particular, while an efficient situation (indicated by minimum transportation cost) is obtained by a more disperse location of firms, competition brings them together and creates inefficiency (by increasing transportation cost)

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SCREENING

When confronted by asymmetric information, the use of small bits of information, or indicators, that suggest more comprehensive information. Screening occurs when those with limited information try to identify indicators suggesting more complete information. It is used in markets with adverse selection and moral hazard, especially in labor markets and in the provision of insurance. Common methods of screening include aptitude tests, affiliations, past behavior, and personal characteristics. A related method is signalling.

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Today, you are likely to spend a great deal of time looking for a downtown retail store trying to buy either a tall storage cabinet with five shelves and a secure lock or a birthday greeting card for your grandmother. Be on the lookout for jovial bank tellers.
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More money is spent on gardening than on any other hobby.
"When your values are clear to you, making decisions becomes easier. "

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