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December 12, 2018 

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AD CURVE: The aggregate demand curve, which is a graphical representation of the relation between aggregate expenditures on real production and the price level, holding all ceteris paribus aggregate demand determinants constant. The aggregate demand, or AD, curve is one side of the graphical presentation of the aggregate market. The other side is occupied by the aggregate supply curve (which is actually two curves, the long-run aggregate supply curve and the short-run aggregate supply curve). The negative slope of the aggregate demand curve captures the inverse relation between aggregate expenditures on real production and the price level. This negative slope is attributable to the interest-rate effect, real-balance effect, and net-export effect.

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Lesson Contents
Unit 1: The Concept
  • A Definition
  • So What?
  • Unit 1 Summary
  • Unit 2: Resources
  • Factors
  • Working Together
  • Free or Scarce?
  • Comparisons
  • Unit 2 Summary
  • Unit 3: Opportunity Cost
  • The Concept
  • Economic Cost
  • Unit 3 Summary
  • Unit 4: College Cost
  • Out of Pocket
  • What Else?
  • Unit 4 Summary
  • Unit 5: THE Problem
  • No Free Lunch
  • Solutions?
  • Unit 5 Summary
  • Course Home
    Scarcity

    In this lesson you'll see why scarcity tends to make economists grumpy. You'll see that scarcity is a perpetual condition that exists because people have unlimited wants and needs, but limited resources used to satisfy these wants and needs. You'll also see how this scarcity problem underlies the common notion of cost, which is integral to the study of economics. The five units contained in this lesson provide a tour through the economic problem of scarcity.

    • The first unit examines the fundamental concept of scarcity -- the combination of limited resources and unlimited wants and needs -- that is virtually synonymous with the study of economics.
    • The second unit discusses the four basic categories of limited resources --labor, capital, land, and entrepreneurship -- that produce the goods that are used to satisfy unlimited wants and needs.
    • In the third unit, we take a look at the notion of opportunity cost and see how it is related to the scarcity problem.
    • We then turn out attention in the fourth unit to a simple example of the explicit and implicit costs of attending college.
    • The fifth and final unit in this lesson then ponders why scarcity is considered THE economic problem and providing a little insight into why economists are grump.

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    MARKET-CLEARING PRICE

    The price that exists when a market is clear of shortage and surplus, or is in equilibrium. Market-clearing price is a common, non-technical term for equilibrium price. In a market graph, the market-clearing price is found at the intersection of the demand curve and the supply curve.

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    APLS

    ORANGE REBELOON
    [What's This?]

    Today, you are likely to spend a great deal of time lost in your local discount super center seeking to buy either clothing for your kitty cats or a set of luggage without wheels. Be on the lookout for vindictive digital clocks with revenge on their minds.
    Your Complete Scope

    This isn't me! What am I?

    Only 1% of the U.S. population paid income taxes when the income tax was established in 1914.
    "Defeat is simply a signal to press onward."

    -- Helen Keller, lecturer, author

    VIR
    Variable Interest Rate
    A PEDestrian's Guide
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