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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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SELLERS' EXPECTATIONS, SUPPLY DETERMINANT

The expectations that sellers have concerning the future price of a good, which is assumed constant when a supply curve is constructed. If sellers expect a higher price, then supply decreases. If sellers expect a lower price, then supply increases. Sellers' expectations are one of five supply determinants that shift the supply curve when they change. The other four are resource prices, production technology, other prices, and number of sellers.

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YELLOW CHIPPEROON
[What's This?]

Today, you are likely to spend a great deal of time flipping through the yellow pages hoping to buy either a birthday greeting card for your grandmother or a coffee cup commemorating yesterday. Be on the lookout for poorly written technical manuals.
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This isn't me! What am I?

Mark Twain said "I wonder how much it would take to buy soap buble if there was only one in the world."
"The only profit center is the customer. "

-- Peter Drucker, management consultant

MPP
Marginal Physical Product
A PEDestrian's Guide
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