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MARGINAL REVENUE, MONOPOLISTIC COMPETITION: The change in total revenue received by a monopolistically competitive firm resulting from a change in the quantity of output sold. For a monopolistically competitive firm, marginal revenue is less than the price.

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Lesson Contents
Unit 1: Adjustments
  • Overview
  • Three Questions
  • Unit 1 Summary
  • Unit 2: Determinants
  • Shifts
  • Demand
  • Supply
  • Unit 2 Summary
  • Unit 3: Single Shifts
  • More Demand
  • Less Demand
  • More Supply
  • Less Supply
  • Unit 3 Summary
  • Unit 4: Double Shifts
  • More Demand and More Supply
  • More Demand and Less Supply
  • Less Demand and Less Supply
  • Less Demand and More Supply
  • Unit 4 Summary
  • Unit 5: Cause and Effect
  • Economic Science
  • Link Sequence
  • Unit 5 Summary
  • Course Home
    Market Shocks

    Our goal in this lesson is to investigate disruptions of the market. Specifically, we want to use the market model previously developed, to examine the why and how of market shocks. What causes market shocks? How do markets react when shocked? If the truth be known, markets in the real world don't remain at the same locations for very long. They move. They adjust. Prices change. Quantities change. We can understand these real world market changes, by analyzing what happens to market model when it's shocked.

    • The first unit, Adjustments, lays the foundation for analyzing market shocks with an overview of the adjustment process and the role played by the ceteris paribus assumption.
    • In the second unit, Determinants, we review the five determinants of demand and five determinants of supply that cause market disruptions.
    • We then move into the actual adjustment process in the third unit, Single Shifts, examining four disruptions that involve a shift in either the demand or supply curve.
    • The fourth unit, Double Shifts, builds on these four basic shifts to exam four complex shocks that have simultaneous shifts in both the demand and supply curves.
    • We end this lesson in the fifth unit, Cause and Effect, by relating market shocks to the fundamental notion of cause and effect inherent in the study of economic science.

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    PRODUCER SURPLUS

    The revenue that producers obtain from a good over and above the price paid. This is the difference between the minimum supply price that sellers are willing to accept and the price that they actually receive. A related notion from the demand side of the market is consumer surplus.

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    APLS

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    Today, you are likely to spend a great deal of time strolling around a discount warehouse buying club seeking to buy either clothing for your kitty cats or a set of luggage without wheels. Be on the lookout for attractive cable television service repair people.
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    The portion of aggregate output U.S. citizens pay in taxes (30%) is less than the other six leading industrialized nations -- Britain, Canada, France, Germany, Italy, or Japan.
    "Inside the ring or out, ain't nothing wrong with going down. It's staying down that's wrong. "

    -- Muhammad Ali

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    Marginal Propensity to Invest
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