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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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AXIOM

A basic precondition or assumption underlying a theory. Axioms are basic, unverifiable world view assumptions--including personal beliefs, political views, and cultural values--that form the foundation of a theory.

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Today, you are likely to spend a great deal of time wandering around the downtown area looking to buy either a coffee cup commemorating next Thursday or a replacement remote control for your stereo system. Be on the lookout for jovial bank tellers.
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John Maynard Keynes was born the same year Karl Marx died.
"The best way to cheer yourself up is to try to cheer somebody else up."

-- Mark Twain

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