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August 9, 2022 

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M: The standard abbreviation for imports produced by the domestic economy and purchased by the foreign sector, especially when used in the study of macroeconomics. This abbreviation is most often seen in the aggregate expenditure equation, AE = C + I + G + (X - M), where C, I, G, and (X - M) represent expenditures by the four macroeconomic sectors, household, business, government, and foreign. The United States, for example, buys a lot of the stuff produced within the boundaries of other countries, including bananas, coffee, cars, chocolate, computers, and, well, a lot of other products. Imports, together with exports, are the essence of foreign trade--goods and services that are traded among the citizens of different nations. Imports and exports are frequently combined into a single term, net exports (exports minus imports).

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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 to markets react when shocked? These are just a few of the questions we want to consider. 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 of this lesson lays the foundation of analyzing market shorts with an overview of the adjustment process and the particular role played by the ceteris paribus assumption.
    • In the second unit, we review the five determinants of demand and five determinants of supply, because these are the are what cause market disruptions.
    • We then move into the actual adjustment process in the third unit, examining the four basic disruptions involving a shift in either the demand or supply curve.
    • The fourth unit builds on these four basic shifts to exam four complex shifts that have simultaneous shifts in both the demand and supply curves.
    • We end this lesson in the fifth unit by relating these market shocks to the fundamental notion of cause and effect inherent in the study of economic science.

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    AVERAGE PROPENSITY TO SAVE

    The proportion of household income that is used for saving. The average propensity to save (abbreviated APS) is really nothing more than average saving. Together with the average propensity to consume, it indicates how a given level of income is divided between consumption and saving. A related saving measure is the marginal propensity to save.

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    APLS

    PINK FADFLY
    [What's This?]

    Today, you are likely to spend a great deal of time searching for a specialty store trying to buy either a rim for your spare tire or decorative celebrity figurines. Be on the lookout for neighborhood pets, especially belligerent parrots.
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    This isn't me! What am I?

    The word "fiscal" is derived from a Latin word meaning "moneybag."
    "Work is an extension of personality. It is achievement. It is one of the ways in which a person defines himself, measures his worth and his humanity. "

    -- Peter Drucker, author

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