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February 2, 2023 

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DOMINANT FIRM: A term employed in industrial organization to describe a firm that is a price maker and faces little competition from smaller price taking firms, called fringe firms. A firm can become a dominant firm because it has lower costs than fringe firms, because they have a superior differentiated product in the market or because a group of firms collectively act as a single firm. A dominant firm usually has a large market share.

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TANSTAAFL: A rather cumbersome and usually hard to remember acronym for the expression "There ain't no such thing as a free lunch. This is a favorite saving of many economists because it highlights, albeit in a grammatically questionable manner, the fundamental problem of scarcity. The phrase serves to emphasize that seemingly "free" lunches are not really free. While they might be free to the customer, someone must pay, that is, incur an opportunity cost of foregone production. The lunch eaten by one person cannot be eaten by another.

     See also | free lunch | scarcity | opportunity cost | scarce resource | scarce good |


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INTEREST RATES, 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 interest rates cause a decrease (leftward shift) of the aggregate curve. A decrease in interest rates an increase (rightward shift) of the aggregate curve. Other notable aggregate demand determinants include the federal deficit, inflationary expectations, and the money supply.

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PURPLE SMARPHIN
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Today, you are likely to spend a great deal of time wandering around the downtown area hoping to buy either a package of 3 by 5 index cards, the ones without lines or a blue mechanical pencil. Be on the lookout for letters from the Internal Revenue Service.
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A U.S. dime has 118 groves around its edge, one fewer than a U.S. quarter.
"We tend to forget that happiness doesn't come as a result of getting something we don't have, but rather of recognizing and appreciating what we do have."

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