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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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SEVENTH RULE OF COMPLEXITY The seventh of seven basic rules of the economy, stating that every action in the complex world has direct and often intended consequences combined with indirect and probably unintended effects.
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BEIGE MUNDORTLE
[What's This?]
Today, you are likely to spend a great deal of time going from convenience store to convenience store seeking to buy either a set of luggage with wheels or a birthday gift for your aunt. Be on the lookout for fairy dust that tastes like salt.
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Only 1% of the U.S. population paid income taxes when the income tax was established in 1914.
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"Defeat is simply a signal to press onward." -- Helen Keller, lecturer, author
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AIC
Akaike's Information Criterion
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