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INJECTION: A non-consumption expenditure on gross domestic product, including investment expenditures, government purchases, and exports. Injections are combined with leakages in the injection-leakage model used to identify equilibrium aggregate output in Keynesian economics. The notion of injection is best viewed through the circular flow, in which investment expenditures, government purchases, and exports are "injected" into the main flow between output, factor payments, national income, and consumption.
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                           AGGREGATE EXPENDITURES EQUATION: An equation that summarizes the four aggregate expenditures on gross domestic product by the four macroeconomic sectors. In the study of Keynesian economics, this equation is commonly used to summarize the demand side of the macroeconomy. The aggregate expenditures equation actually comes in three different versions depending on how many of the four sectors and their expenditures are included. The aggregate expenditures equation is the sum of the four aggregate expenditures (consumption expenditures, investment expenditures, government purchases, and net exports). This equation provides a short-hand notion that summarizes the demand side of the economy.The general aggregate expenditures equation is: where: AE is aggregate expenditures, C is consumption expenditures, I is investment expenditures, G is government purchases, and X-M is net exports, exports (X) minus imports (M).This particular version of the aggregate expenditures equation is for all four macroeconomic sectors (household sector, business sector, government sector, and foreign sector). In some circumstances reduced versions, with fewer sectors, are more useful. A three-sector version that includes the household, business, and government sectors is: And the simplest aggregate expenditures equation is for the two private sectors--household and business. It is specified as:
Recommended Citation:AGGREGATE EXPENDITURES EQUATION, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 2000-2024. [Accessed: July 26, 2024].
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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors trying to buy either a rotisserie oven that can also toast bread or a flower arrangement in a coffee cup for your father. Be on the lookout for poorly written technical manuals.
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Okun's Law posits that the unemployment rate increases by 1% for every 2% gap between real GDP and full-employment real GDP.
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"Old age isn't so bad when you consider the alternative. " -- Cato, Roman orator
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IRPP
Institute for Research on Public Policy
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