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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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APLS

BLACK DISMALAPOD
[What's This?]

Today, you are likely to spend a great deal of time at a dollar discount store trying to buy either a flower arrangement with anything but tulips for your grandfather or a birthday greeting card for your mother that doesn't look like a greeting card. Be on the lookout for door-to-door salesmen.
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This isn't me! What am I?

It's estimated that the U.S. economy has about $20 million of counterfeit currency in circulation, less than 0.001 perecent of the total legal currency.
"It is only our deeds that reveal who we are. "

-- Carl Jung, psychiatrist

LAN
Locally Asymptotically Normal
A PEDestrian's Guide
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