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DISPOSABLE INCOME AND PERSONAL INCOME: Disposable income (DI) is the total income that can be used by the household sector for either consumption or saving during a given period of time, usually one year. Personal income (PI) is the total income received by the members of the domestic household sector, which may or may not be earned from productive activities during a given period of time, usually one year. Disposable income is after-tax income that is officially calculated as the difference between personal income and personal tax and nontax payments. In the numbers game, personal tax and nontax payments are about 15 percent of personal income, which makes disposable personal income about 85 percent of personal income.

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Lesson 5: Market Demand | Unit 4: Determinants Page: 16 of 20

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The five determinants that cause the demand curve to shift are:
  • Income: Income affects the ability of buyers to buy. It can affect a good in two ways-normal or inferior.
  • Preferences: Preferences, our likes and dislikes, affect the willingness of buyers to buy.
  • Prices of other goods: Other goods can be either substitutes or complements to the good we're analyzing.
  • Expectations: Buyers' current demand depends on expectations of future prices.
  • Number of buyers: More buyers, more demand. Fewer buyers, less demand.
These categories include all factors other than price that affect demand.

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AGGREGATE SUPPLY INCREASE, SHORT-RUN AGGREGATE MARKET

A shock to the short-run aggregate market caused by an increase in aggregate supply, resulting in and illustrated by a rightward shift of the short-run aggregate supply curve. An increase in aggregate supply in the short-run aggregate market results in a decrease in the price level and an increase in real production. The level of real production resulting from the shock can be greater or less than full-employment real production.

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Today, you are likely to spend a great deal of time at the confiscated property police auction trying to buy either a remote controlled sports car with an air spoiler or semi-gloss photo paper that works with your neighbor's printer. Be on the lookout for empty parking spaces that appear to be near the entrance to a store.
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The 1909 Lincoln penny was the first U.S. coin with the likeness of a U.S. President.
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