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AE LINE: Another term for aggregate expenditure line, which is a line representing the relation between aggregate expenditures and gross domestic product used in the Keynesian cross. The aggregate expenditure line is obtained by adding investment expenditures, government purchases, and net exports to the consumption line. As such, the slope of the aggregate expenditure line is largely based on the slope of the consumption line (which is the marginal propensity to consume), with adjustments coming from the marginal propensity to invest, the marginal propensity for government purchases, and the marginal propensity to import. The intersection of the aggregate expenditures line and the 45-degree line identifies the equilibrium level of output in the Keynesian cross.
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Lesson 15: Aggregate Market | Unit 2: Equilibrium
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Page: 7 of 22
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Equilibrium in the aggregate market occurs when the forces of aggregate demand and aggregate supply are balanced.- Equilibrium is a balance of forces that will remain unchanged until some other, outside force intervenes.
- For the market, the forces are supply and demand. For the aggregate market, the forces are aggregate demand and aggregate supply.
- The aggregate demand force is our four sectors who want GDP at the lowest price level possible.
- The aggregate supply force is our scarce resources who want to sell GDP at the highest prices possible.
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GOOD TYPES The economy produces four distinct types of goods based on two key characteristics -- consumption rivalry and nonpayer excludability. Consumption rivalry arises if consumption of a good by one person prevents another from also consuming. Nonpayer excludability means potential consumers who do not pay for a good can be excluded from consuming. Private goods are rival in consumption and easily subject to the exclusion of nonpayers. Public goods are nonrival in consumption and the exclusion of nonpayers is virtually impossible. Near-public goods are nonrival in consumption and easily subject to exclusion. Common-property goods are rival in consumption and not easily subject to exclusion. Private goods can be efficiently exchanged through markets. Public, near-public and common-property goods cannot, but require some degree of government involvement for efficiency.
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BLUE PLACIDOLA
[What's This?]
Today, you are likely to spend a great deal of time lost in your local discount super center wanting to buy either a 50 foot extension cord or a combination CD player, clock radio, and telephone (with answering machine). Be on the lookout for cardboard boxes.
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The wealthy industrialist, Andrew Carnegie, was once removed from a London tram because he lacked the money needed for the fare.
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"The greatest things ever done on Earth have been done little by little. " -- William Jennings Bryan
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JIE
Journal of Industrial Economics
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