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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.

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Lesson 3: Scarcity | Unit 1: The Concept Page: 3 of 17

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  • The fundamental concept of scarcity that faces society.
  • The role unlimited wants and needs play in creating the problem of scarcity.
  • The role limited resources play in creating the problem of scarcity.
  • What the scarcity problem means for society.

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AGGREGATE EXPENDITURES EQUATION

An equation that summarizes the four aggregate expenditures on gross domestic product by the four macroeconomic sectors. In the study of Keynesian economics, this equation is commonly used to summarize the demand side of the macroeconomy. The aggregate expenditures equation actually comes in three different versions depending on how many of the four sectors and their expenditures are included.

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Today, you are likely to spend a great deal of time at a dollar discount store seeking to buy either storage boxes for your summer clothes or 500 feet of coaxial cable. Be on the lookout for telephone calls from long-lost relatives.
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The average length of a "business lunch" is about 36 minutes.
"A leader, once convinced that a particular course of action is the right one, must . . . be undaunted when the going gets tough."

-- President Ronald Reagan

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