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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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ALTERNATIVE UNEMPLOYMENT RATES

The official unemployment rate estimated and reported monthly by the Bureau of Labor Statistics (BLS) using data from Current Population Survey is one of six alternative measures of unemployment tracked and reported by the BLS, officially labeled sequentially U1 through U6. The "official" unemployment rate is U3. The other five measures seek to document different ways in which labor can be under utilized, including unemployment duration, job losers, discouraged workers, marginal workers, and part-time workers.

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APLS

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Today, you are likely to spend a great deal of time at an auction seeking to buy either a bottle of blackcherry flavored spring water or a travel case for you toothbrush. Be on the lookout for crowded shopping malls.
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In 1914, Ford paid workers who were age 22 or older $5 per day -- double the average wage offered by other car factories.
"We may affirm absolutely that nothing great in the world has been accomplished without passion."

-- Hegel

AVC
Average Variable Cost
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