March 20, 2018 

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POVERTY LINE: The official measure of the income needed by a family based on family size, location, and characteristics of the head of the household. The official U.S. poverty line is based on more of a relative poverty level rather than an absolute poverty level. For example, a family of two living in a rural area would need a different amount of money to stay above the official poverty line that would a family of four living in a city.

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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,, AmosWEB LLC, 2000-2018. [Accessed: March 20, 2018].

Check Out These Related Terms...

     | aggregate expenditures line | two-sector aggregate expenditures line | three-sector aggregate expenditures line | four-sector aggregate expenditures line | derivation, aggregate expenditures line | slope, aggregate expenditures line | intercept, aggregate expenditures line | aggregate expenditures determinants | induced expenditures | autonomous expenditures |

Or For A Little Background...

     | macroeconomic sectors | consumption expenditures | investment expenditures | government purchases | net exports | aggregate expenditures | Keynesian economics | macroeconomics | household sector | business sector | government sector | foreign sector | national income | gross domestic product | effective demand | psychological law | consumption line | investment line | government purchases line | net exports line |

And For Further Study...

     | Keynesian model | two-sector Keynesian model | three-sector Keynesian model | four-sector Keynesian model | Keynesian equilibrium | injections-leakages model | two-sector injections-leakages model | three-sector injections-leakages model | four-sector injections-leakages model | aggregate demand | paradox of thrift | fiscal policy | multiplier |

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