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S-I MODEL: A model used to identify equilibrium in Keynesian economics based on injections (investment, I) and leakages (saving, S) for the two basic sectors (household and business). Equilibrium is achieved at the intersection of the saving line, S, and the investment line, I.
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Lesson 5: Market Demand | Unit 4: Determinants
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Page: 18 of 20
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- Why relaxing the ceteris paribus assumption enables further analysis of demand and markets.
- How the changes in the demand determinants cause rightward or leftward shifts in the demand curve.
- The five basic demand determinants: income, preferences, prices of other goods, buyers' expectations, and number of buyers.
- How income affects the demand for normal goods differently than inferior goods.
- How a change in the price of a substitute goods affects demand differently than a change in the price of a complement good.
- Most important of all, the difference between a change in demand, caused by a change in a demand determinant, and a change in quantity demanded, caused by a change in price.
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AGGREGATE EXPENDITURES LINE A graphical depiction of the relation between aggregate expenditures by the four macroeconomic sectors (household, business, government, and foreign) and the level of aggregate income or production. In Keynesian economics, the aggregate expenditures line is the essential component of the Keynesian cross analysis used to identify equilibrium income and production. Like any straight line, the aggregate expenditures line is characterized by vertical intercept, which indicates autonomous expenditures, and slope, which indicates induced expenditures. The aggregate expenditures line used in Keynesian economics is derived by adding or stacking investment, government purchases, and net exports to the consumption line.
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PURPLE SMARPHIN
[What's This?]
Today, you are likely to spend a great deal of time touring the new suburban shopping complex looking to buy either a package of 3 by 5 index cards, the ones without lines or a blue mechanical pencil. Be on the lookout for slightly overweight pizza delivery guys.
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The standard "debt" notation I.O.U. does not mean "I owe you," but actually stands for "I owe unto..."
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"The best way to cheer yourself up is to try to cheer somebody else up." -- Mark Twain
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HDI
Human Development Index
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