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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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                           FALLACY OF DIVISION: The logical fallacy of arguing that what is true for the whole is also true for the parts. In the study of economics, this takes the form of assuming that what works for the aggregate, or macroeconomy, also works for parts of the economy, such as households or businesses. The contrasting fallacy is the fallacy of composition. The fallacy of division, together with the fallacy of composition, highlights the difference between macroeconomics and microeconomics. Macroeconomics operates according one set of laws and principles, while microeconomics operates according to another set. Assuming what works for the aggregate economy also works for parts of the economy leads to the fallacy of division.For example, during economic bad times (recession), the appropriate action for the Federal government (as "caretaker" of the aggregate economy) is to increase spending and reduce taxes. A recessionary period is not the time for government to act prudently, to save, to set aside extra funds for a rainy day. However, should a family or business try to operate in a similar manner, then they are bound to encounter problems, and to commit the fallacy of division. Saving less and spending more during a recession can be disastrous at the microeconomic family level. The aggregate economy is a complex system comprised of smaller microeconomic components. An analogy is the human body. Individuals and firms make up the aggregate economy like cells and molecules make up the human body. Rules that apply to entire body do not apply to the cells. Rules that apply to entire macroeconomy do not apply to the firms, households, markets, and industries. What is true at the macroeconomic level is not necessarily true at the microeconomic level. What is true for the whole is not necessarily true for the parts.
Recommended Citation:FALLACY OF DIVISION, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 2000-2025. [Accessed: July 15, 2025].
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Today, you are likely to spend a great deal of time calling an endless list of 800 numbers seeking to buy either a replacement nozzle for your shower or a decorative windchime with plastic . Be on the lookout for the last item on a shelf.
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