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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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AVERAGE FACTOR COST

Total factor cost per unit of factor input employed by a firm in the production of output, found by dividing total factor cost by the quantity of factor input. Average factor cost, abbreviated AFC, is generally equal to the factor price. However, using the longer term average factor cost makes it easier to see the connection to related terms, including total factor cost and marginal factor cost.

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BLUE PLACIDOLA
[What's This?]

Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius looking to buy either a pleather CD case or a how-to book on fine dining. Be on the lookout for cardboard boxes.
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The penny is the only coin minted by the U.S. government in which the "face" on the head looks to the right. All others face left.
"Trust yourself. You know more than you think you do. "

-- Benjamin Spock, doctor

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