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VERIFIED PRINCIPLE: A generally accepted, verified, fundamental law of nature that has been tested against and verified with real world data. A verified principle begins as an hypotheses implied by a theory, which is then compared against real world observations. If the hypothesis is consistently supported by data, it achieves the rank "verified" principle. This should be contrasted with unverifiable axiom.

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Lesson Contents
Unit 1: The Set Up
  • Demand Review
  • Bring On Utility
  • Choices
  • Unit 1 Summary
  • Unit 2: A Simple Choice
  • One Good
  • Demand For A Good
  • Unit 2 Summary
  • Unit 3: Complex Choices
  • Two Goods
  • How Much Of Each?
  • A Short Cut?
  • Income And Prices
  • Rule Of Consumer Equilibrium
  • Unit 3 Summary
  • Unit 4: On To Demand
  • A Generalized Choice
  • A Price Change
  • Marginal Utility Curve
  • Unit 4 Summary
  • Unit 5: Beyond Demand
  • Many Choices
  • Demand Elasticity
  • Market Supply
  • Unit 5 Summary
  • Course Home
    Utility and Demand

    This lesson undertakes a detailed investigation into the decision-making process underlying the purchase of goods and services. Doing so provides a behind-the-scenes examination of market demand, offering an explanation for the inverse relation between demand price and quantity demanded that is the law of demand.

    • The first unit of this lesson, The Set Up, begins with a review of the market demand and consumer demand theory.
    • In the second unit, A Simple Choice, we examine the decision-making process for purchasing a single good.
    • The third unit, Complex Choices, then complicates matters slightly by adding a second good into the decision making mix.
    • The fourth unit, On To Demand, presents the rule of consumer equilibrium that captures the essence of this decision-making process and how it helps explain the law of demand.
    • The fifth unit and final unit, Beyond Demand, explores how consumer demand theory provides insight to noneconomic choices, demand elasticity, and market supply.

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    ELASTICITY

    The relative response of one variable to changes in another variable. Elasticity is commonly used in the study of market exchanges to identify the relative response of quantity (demanded and supplied) to changes in price. The phrase "relative response" is best interpreted as the percentage change, such as, the percentage change in quantity measured against the percentage change in price. The most common notions of elasticity are the price elasticity of demand and the price elasticity of supply. Other notable economic elasticities are the income elasticity of demand and the cross elasticity of demand.

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    Today, you are likely to spend a great deal of time calling an endless list of 800 numbers wanting to buy either a large green chalkboard shaped like the state of Maine or a replacement battery for your pocket calculator. Be on the lookout for attractive cable television service repair people.
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