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ENTRY BARRIER: An institutional, government, technological, or economic restriction on the entry of firms into a market or industry. The four primary barriers to entry are: resource ownership, patents and copyrights, government restrictions, and start-up costs. Barriers to entry are a key reason for market control and the inefficiency that this generates. In particular, monopoly, oligopoly, monopsony, and oligopsony often owe their market control to assorted barriers to entry. By way of contrast, perfect competition, monopolistic competition, and monopsonistic competition have few if any barriers to entry and thus little or no market control.

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PREFERENCES CHANGE, UTILITY ANALYSIS

A disruption of consumer equilibrium identified with utility analysis caused by changes in the preferences for a good, which likely results in a change in the quantities of the goods consumed. The change in preferences alters the marginal utility-price ratio and forces a reevaluation of the rule of consumer equilibrium.

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Today, you are likely to spend a great deal of time at a dollar discount store seeking to buy either a hepa filter for your furnace or a wall poster commemorating next Thursday. Be on the lookout for a thesaurus filled with typos.
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The average length of a "business lunch" is about 36 minutes.
"Long-range goals keep you from being frustrated by short-term failures "

-- J. C. Penney, Retailer

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Tokyo Grain Exchange (Japan)
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