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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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AVERAGE PRODUCT CURVE

A curve that graphically illustrates the relation between average product and the quantity of the variable input, holding all other inputs fixed. This curve indicates the per unit output at each level of the variable input. The average product curve is one of three related curves used in the analysis of the short-run production of a firm. The other two are total product curve and marginal product curve.

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Today, you are likely to spend a great deal of time driving to a factory outlet looking to buy either storage boxes for your income tax returns or an AC adapter for your CD player. Be on the lookout for the happiest person in the room.
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The average length of a "business lunch" is about 36 minutes.
"Always vote for principle, though you may vote alone, and you may cherish the sweetest reflection that your vote is never lost. "

-- John Quincy Adams, 6th US president

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