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L: This has two common uses. One is as the standard abbreviation for the quantity of labor, especially for the analysis of production. The complementary representations for other inputs are "K" for capital and "N" for population. The second is as the broadest monetary aggregate for the U.S. economy tracked by the Federal Reserve System, best thought of as total liquid assets. It was since be discontinued. In it's heyday, it was comprised of everything in M3 plus other liquid assets, including U.S. Treasury bills, commercial paper, and savings bonds. L was typically 15 to percent higher than M3 and seven times as much as M1. The Federal Reserve System discontinued this measurement in 1998.

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Lesson Contents
Unit 1: Basic Flow
  • Overview
  • Four Sectors
  • Three Markets
  • The Physical Flow
  • The Payment Flow
  • Unit 1 Summary
  • Unit 2: Financial Markets
  • The Paper Economy
  • Saving
  • Investment
  • Unit 2 Summary
  • Unit 3: Government
  • What It Does
  • Taxes
  • Government Purchases
  • Government Borrowing
  • Unit 3 Summary
  • Unit 4: Foreign
  • Foreign Trade
  • Exports and Imports
  • Unit 4 Summary
  • Unit 5: Real World
  • Expenditures
  • Production And Income
  • Investment
  • Government Spending
  • Saving
  • Unit 5 Summary
  • Course Home
    Circular Flow

    This lesson introduces the circular flow model of the macroeconomy. The circular flow is a simple model based on the buying and selling relation between the household and business sectors which occurs through the product and factor markets. As a bonus, we complicate the simply circular flow model, by including the government and foreign sectors, and the financial markets. This lesson introduces several important macroeconomic concept, but more importantly, provides a useful model for interpreting macroeconomic activity.

    • In the first unit, we get an introduction to the simplest circular flow model that includes the household and business sectors and the product and factor markets.
    • The second unit builds on the simple model by introducing the financial markets, which highlights the importance of household saving and business investment.
    • The circular flow is expanding further in the third unit, with the introduction of the government sector, which highlights how taxes are diverted away from the household sector.
    • The fourth unit adds one more sector to the circular flow model, the foreign sector, which illustrates the roles played exports and imports.
    • The fifth unit wraps up this lesson by showing how several key measures of production and income revealed in the analysis of gross domestic production related to the circular flow.

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    AVERAGE PRODUCT CURVE

    A curve that graphically illustrates the relation between average product and the quantity of the variable input, holding all other inputs fixed. This curve indicates the per unit output at each level of the variable input. The average product curve is one of three related curves used in the analysis of the short-run production of a firm. The other two are total product curve and marginal product curve.

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    Today, you are likely to spend a great deal of time at a flea market trying to buy either a hepa filter for your furnace or a wall poster commemorating next Thursday. Be on the lookout for celebrities who speak directly to you through your television.
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    A scripophilist is one who collects rare stock and bond certificates, usually from extinct companies.
    "Before you can inspire with emotion, you must be swamped with it yourself. Before you can move their tears, your own must flow. To convince them, you must yourself believe."

    -- Sir Winston Churchill

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