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September 22, 2018 

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INJECTION LINE: A line used in the injection-leakage model representing the relation between non-consumption expenditures (that is, injections) and national income. The three injections are investment expenditures, government purchases, and exports. The foundation of the injection line is the investment line, which is then enhanced by adding government purchases and exports. The other part of the injection-leakage model is a line representing leakages. The intersection of the injection and leakage lines identifies equilibrium aggregate output, or Keynesian equilibrium.

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Lesson Contents
Unit 1: Buying Basics
  • The Concept
  • Demand Price
  • Quantity Demanded
  • Unit 1 Summary
  • Unit 2: Law of Demand
  • Definition
  • Income Effect
  • Substitution Effect
  • Unit 2 Summary
  • Unit 3: Demand Curve
  • Schedule
  • Curve
  • Space
  • Unit 3 Summary
  • Unit 4: Determinants
  • Ceteris Paribus Factors
  • Shifters: Increase
  • Shifters: Decrease
  • Types
  • Ch...Ch...Changes
  • Unit 4 Summary
  • Unit 5: Scarcity
  • Unlimited Wants
  • Unit 5 Summary
  • Unit 6:
  • Unit 6 Summary
  • Course Home
    Demand

    This lesson on demand offers a little insight into the purchases of a wide range of goods. In fact, this demand topic is does more than offer insight into buying behavior. It's also one half of the market analysis -- the other half being supply. And market analysis is one of the most widely used tools in the study of economics. Economists explain a lot of economic phenomenon using markets. But to use markets, we need demand. And that brings us back to this lesson.

    • In the first unit of this lesson we examine the basic concept of demand. While you've likely come across the term demand before, we'll see the specific way the term is used in economics.
    • The second unit then takes a look at the law of demand, which is one of the most important and most fundamental economic principles that we'll encounter.
    • As we more on to the third unit, our attention turns to the demand curve, which is the graphical embodiment of the demand concept.
    • In the fourth unit, we examine how the five basic demand determinants cause the demand curve to shift from one location to another.
    • And finally in the fifth unit, we make a connection between demand and the fundamental problem of scarcity.

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    DECREASING RETURNS TO SCALE

    A given proportional change in all resources in the long run results in a proportional smaller change in production. Decreasing returns to scale exists if a firm increases ALL resources--labor, capital, and other inputs--by a given proportion (say 10 percent) and output increases by less than this proportion (that is, less than 10 percent). This is one of three returns to scale. The other two are increasing returns to scale and constant returns to scale.

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    APLS

    BEIGE MUNDORTLE
    [What's This?]

    Today, you are likely to spend a great deal of time searching for rummage sales seeking to buy either one of those memory foam pillows or a remote controlled train set. Be on the lookout for infected paper cuts.
    Your Complete Scope

    This isn't me! What am I?

    It's estimated that the U.S. economy has about $20 million of counterfeit currency in circulation, less than 0.001 perecent of the total legal currency.
    "Always remember that striving and struggle precede success, even in the dictionary. "

    -- Sarah Ban Breathnach, writer

    DCF
    Discounted Cash Flow
    A PEDestrian's Guide
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