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BARRIER TO ENTRY: 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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PHYSICAL WEALTH, AGGREGATE DEMAND DETERMINANT One of several specific aggregate demand determinants assumed constant when the aggregate demand curve is constructed, and that shifts the aggregate demand curve when it changes. An increase in the physical wealth causes a decrease (leftward shift) of the aggregate curve. A decrease in the physical wealth causes an increase (rightward shift) of the aggregate curve. Other notable aggregate demand determinants include interest rates, federal deficit, inflationary expectations, and the money supply.
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PURPLE SMARPHIN
[What's This?]
Today, you are likely to spend a great deal of time at a dollar discount store wanting to buy either a bottle of blackcherry flavored spring water or a travel case for you toothbrush. Be on the lookout for infected paper cuts.
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Helping spur the U.S. industrial revolution, Thomas Edison patented nearly 1300 inventions, 300 of which came out of his Menlo Park "invention factory" during a four-year period.
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"Are you bored with life? Then throw yourself into some work you believe in with all your heart. Live for it, die for it, and you will find happiness that you had thought could never be yours. " -- Dale Carnegie, writer
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EGARCH
Exponential Generalized Autoregressive Conditional Heteroskedasticity
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