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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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SUBSTITUTE GOOD

In general, one of two (or more) goods that are related in an either/or fashion. In terms of demand, substitute goods are those that provide the same basic satisfaction of a want or need when consumed. In terms of supply, substitute goods are those that use the same resource for production in an exclusionary manner. A substitute good is one of two ways that goods are related. The other is a complement good.

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BEIGE MUNDORTLE
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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 genuine down-filled pillow or one of those "hang in there" kitty cat posters. Be on the lookout for defective microphones.
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Only 1% of the U.S. population paid income taxes when the income tax was established in 1914.
"The majority of men meet with failure because of their lack of persistence in creating new plans to take the place of those that fail. "

-- Napoleon Hill, author

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