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KEYNESIAN THEORY: A theory of macroeconomics developed by John Maynard Keynes built on the proposition that aggregate demand is the primary source of business cycle instability, especially recessions. The basic structure of the Keynesian theory of economics was initially presented in Keynes' book The General Theory of Employment, Interest, and Money (1936).

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Lesson 3: Scarcity | Unit 3: Opportunity Cost Page: 11 of 17

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  • The basic concept of opportunity cost as the highest valued alternative foregone in the pursuit of an activity.
  • How the fact that limited resources have alternative uses intertwines the notion of opportunity cost and the basic problem of scarcity.
  • Why economic cost is synonymous with opportunity cost.
  • Why opportunity cost need not be measured in money terms.
  • The difference between explicit and implicit opportunity cost.

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CHANGE IN AGGREGATE EXPENDITURES

The movement along an aggregate demand curve caused by a change in the price level. A change in aggregate expenditures is ONLY caused by a change in the price level. This is one of two changes related to aggregate demand. The other is a change in aggregate demand. A change in aggregate expenditures is comparable to a change in quantity demanded.

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Today, you are likely to spend a great deal of time at a dollar discount store trying to buy either a pair of red and purple designer socks or a T-shirt commemorating Thor Heyerdahl's Pacific crossing aboard the Kon-Tiki. Be on the lookout for slightly overweight pizza delivery guys.
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Three-forths of the gold mined each year is used to manufacture jewelry.
"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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