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AGGLOMERATION: The clustering of several similar or related activities at the same location. Many industries have firms that tend to agglomerate, that is, locate very close to one another, leading to geographic concentration. For example, the motion picture industry is concentrated in California, the fashion industry is concentrated in New York, and the petroleum industry is concentrated in Texas. Agglomeration can be caused by accessibility to a concentrated natural resource (such as petroleum or sunny weather), but if often feeds upon itself through agglomeration economies. Firms in the same industry often have lower production cost when the located near their competitors.

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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 driving to a factory outlet wanting to buy either a flower arrangement for that special day for your mother or a New York Yankees baseball cap. Be on the lookout for malfunctioning pocket calculators.
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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court!
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