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June 9, 2026 

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MARGINAL COST CURVE: A curve that graphically represents the relation between marginal cost incurred by a firm in the short-run product of a good or service and the quantity of output produced. This curve is constructed to capture the relation between marginal cost and the level of output, holding other variables, like technology and resource prices, constant. The marginal cost curve is U-shaped. Marginal cost is relatively high at small quantities of output, then as production increases, declines, reaches a minimum value, then rises. This shape of the marginal cost curve is directly attributable to increasing, then decreasing marginal returns (and the law of diminishing marginal returns).

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ABSTRACTION METHODS: Abstraction is the process of simplifying the complexities of the real world by ignoring (hopefully) unimportant details, especially (for our purposes) while doing economic analysis. Three common methods of actual, real world abstraction used in economic theories are words, graphs, and equations. Words can be misunderstood. Graphs are a little more precise. And equations tend to be the most precise of the three.

     See also | abstraction | economic analysis | scientific method | science | theory | hypothesis | verification | graphical analysis | variable | money | money characteristics | income | price | quantity |


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ECONOMIC GOOD

A tangible item produced with society's limited resources for the purpose of satisfying wants and needs. As a general notion, the phrase economic good also commonly includes intangible services produced with society's limited resources for the purpose of satisfying wants and needs. A synonymous term for economic good is scarce good.

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