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ENTRY BARRIERS: Institutional, government, technological, or economic restrictions 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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RULE OF CONSUMER EQUILIBRIUM

A condition of consumer equilibrium and utility maximization stating that the marginal utility-price ratios for all goods are equal. This rule is a handy way of checking for consumer equilibrium and utility maximization. If the rule is not satisfied, then consumer equilibrium and utility maximization are not achieved.

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APLS

GRAY SKITTERY
[What's This?]

Today, you are likely to spend a great deal of time going from convenience store to convenience store looking to buy either a how-to book on surfing the Internet or a computer that can play music and burn CDs. Be on the lookout for slow moving vehicles with darkened windows.
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A half gallon milk jug holds about $50 in pennies.
"Try not to become a man of success, but rather try to become a man of value. "

-- Albert Einstein

JEMS
Journal of Economics and Management Strategy
A PEDestrian's Guide
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