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GOVERNMENT PURCHASES LINE: A graphical depiction of the relation between government purchases and national income (or gross domestic product) that plays a role in Keynesian economics and the Keynesian cross. The slope of this line is positive, greater than zero, less than one, and goes by the name marginal propensity for government purchases. The vertical intercept of this line is autonomous government purchases. The aggregate expenditures line used in the Keynesian cross is obtained by adding this government purchases line, as well as, investment expenditures and net exports, to the consumption line. The government purchases line is also combined with investment expenditures for the Keynesian saving-investment model.

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Lesson 10: Gross Domestic Product | Unit 1: Measuring Production Page: 4 of 25

Topic: Given Year <=PAGE BACK | PAGE NEXT=>

The third GDP highlight phrase is 'a given period of time'.

GDP is production that takes place during a specific period, usually one year.

  • GDP is a flow. Current production takes place during the specific period of time under study.
  • Flows are measured over a period of time. GDP is measured from January 1st to December 31st.
  • Stocks are measured at a point in time. The quantity of money is measured at an instant in time, like July 26th at 8:15.
  • In addition to GDP, other production and income measures in this lesson are flows.
  • In addition to money, employment, business inventories, and labor force are stocks.

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BARTER ECONOMY

An economy that trades goods and services predominately using barter exchanges rather than money. Barter economies predated the invention of money, emerging out the early stage of self-sufficiency before giving way to the use of commodity money. However, barter economies occasionally surface in modern times, especially when the public loses confidence in the monetary unit during a government crises or a period of hyperinflation.

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Today, you are likely to spend a great deal of time searching the newspaper want ads trying to buy either a flower arrangement in a coffee cup for your father or a how-to book on meeting people. Be on the lookout for fairy dust that tastes like salt.
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Natural gas has no odor. The smell is added artificially so that leaks can be detected.
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