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PERFECTLY INELASTIC: An elasticity alternative in which changes in price do NOT cause any change in quantity. In other words, quantity is totally, completely unresponsive to price. Quantity just does not change, regardless of changes in price. Perfectly inelastic should be compared with other elasticity alternatives--perfectly elastic, relatively elastic, relatively inelastic, and unit elastic.

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Lesson Contents
Unit 1: Intro
  • Definition
  • Market Structure Continuum
  • Real World Oligopoly
  • Structure And Behavior
  • Unit 1 Summary
  • Unit 2: Structure
  • Concentration
  • Concentration Ratios
  • Herfindahl Index
  • Entry Barriers
  • Unit 2 Summary
  • Unit 3: Behavior
  • Interdependence
  • Collusion
  • Merger
  • Unit 3 Summary
  • Unit 4: Analysis
  • Kinked-Demand Curve
  • Kinked-Demand Curve Analysis
  • Collusion Cost
  • Collusion Output
  • Game Theory
  • Unit 4 Summary
  • Unit 5: Evaluation
  • The Bad
  • The Good
  • Government Intervention?
  • Unit 5 Summary
  • Course Home
    Oligopoly

    • The first unit of this lesson, A Few Firms, begins this lesson with a look at the nature of oligopoly and how it is related to other market structures.
    • In the second unit, Structure, we see how markets with a small number of large firms are structured.
    • The third unit, Behavior, then looks at some of activities undertaken by oligopoly that are not seen in other market structures.
    • In the fourth unit, Some Graphs, we use a few graphs to examine different ways that oligopoly firms interact in the production of output.
    • The fifth and final unit, Taking Stock, then closes this lesson by considering the good and the bad of oligopoly and why it is often prone to government scrutiny.

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    UNIT ELASTIC

    An elasticity alternative in which changes in one variable (usually price) cause equal proportional changes in another variable (usually quantity). In other words, any change in price, whether big or small, triggers exactly the same percentage change in quantity. Quantity changes match price changes. This characterization of elasticity is most important for the price elasticity of demand and the price elasticity of supply. Unit elastic is one of five elasticity alternatives. The other four are perfectly elastic, perfectly inelastic, relatively elastic, and relatively inelastic.

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