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August 14, 2022 

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PIE CHART: A circular graph divided into wedges that is commonly used to present the division of a total among parts. The circular "pie" represents the total value and each slice represents the portion distributed to each category. Pie charts are a handy way to present information, but are not well suited for more involved economic analysis.

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Lesson Contents
Unit 1: Demand Theory
  • The Theory
  • Making Decisions
  • Utility
  • On To Demand
  • Unit 1 Summary
  • Unit 2: Total Utility
  • A Measure Of Satisfaction
  • Total Utility Schedule
  • Utility Maximization
  • Unit 2 Summary
  • Unit 3: Marginal Utility
  • Incremental Satisfaction
  • Measuring Marginal Utility
  • Diminishing Marginal Utility
  • Getting Satisfied
  • Diamond-Water Paradox
  • Unit 3 Summary
  • Unit 4: The Curves
  • Total Utility
  • Marginal Utility
  • Both Curves
  • Unit 4 Summary
  • Unit 5: Taking Stock
  • Two Laws
  • Two Considerations
  • Unit 5 Summary
  • Course Home
    Consumer Demand

    This lesson discusses the basics of consumer demand theory, especially the notion of utility. Utility is the fancy-schmancy economic term that means satisfying wants and needs. The purpose of this lesson is to set the stage for a behind-the-scenes look at the demand-side of the market. Because the prices buyers are willing to pay for the goods depend on the utility, an understanding of demand requires an understanding of utility.

    • The first unit of this lesson, Demand Theory, introduces the concept of utility and previews the relation between utility, consumer decision making, and demand.
    • In the second unit, Total Utility, we take a look at the first of two key technical notions of utility are used to examine the relation between utility and demand.
    • The third unit, Marginal Utility, presents and discusses the second of the two technical notions of utility, and the most important notion underlying demand.
    • The fourth unit, The Curves, illustrates the total utility and marginal utility concepts with handy graphs.
    • The fifth unit, Taking Stock, then wraps up this lesson with an extended preview of the relation between utility and demand.

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    SLOPE, LONG-RUN AGGREGATE SUPPLY CURVE

    The long-run aggregate supply (LRAS) curve is a vertical line with an infinite slope, reflecting the independent relation between the price level and aggregate real production. A higher price level is associated with the same real production as a lower price level. This is the real production generated when resources are fully employed, that is, full-employment production.

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