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February 13, 2026 

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ABSOLUTE ADVANTAGE: The general ability to produced more goods using fewer resources. This idea of absolute advantage is important for trading that occurs between both people and nations. A nation can get an absolute advantage from an advanced level of technology or higher quality resources. For a person, an absolute advantage can result from natural abilities or the acquisition of human capital (education, training, or experience).

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FOUR-SECTOR KEYNESIAN MODEL: A model used to identify equilibrium in Keynesian economics based on aggregate expenditures by all four sectors (household, business, government, and foreign). Equilibrium is achieved at the intersection of the aggregate expenditures line, AE = C + I + G + (X - M), and the 45-degree line, Y = AE. This is the complete Keynesian aggregate expenditures model can be used to analyzed the impact of the foreign sector on aggregate expenditures and equilibrium.

     See also | Keynesian economics | Keynesian equilibrium | consumption line | aggregate expenditures line | 45-degree line | household sector | business sector | government sector | foreign sector | fiscal policy | two-sector Keynesian model | three-sector Keynesian model |


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FOUR-SECTOR KEYNESIAN MODEL, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2026. [Accessed: February 13, 2026].


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AVERAGE-MARGINAL RELATION

A mathematical connection between a marginal value and the corresponding average value stating that the change in the average value depends on a comparison between the average and the marginal. This mathematical relation between average and marginal surfaces throughout the study of economics, especially production (average product and marginal product), cost (average total cost and marginal cost), and revenue (average revenue and marginal revenue). A similar relation is that between a total value and the corresponding marginal value.

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