Law of Demand¶
In microeconomics, the law of demand is a fundamental principle which states that there is an inverse relationship between price and quantity demanded.
Core Idea¶
Law of Demand is treated here as the recurring social sciences, humanities, and arts identity summarized by this source-grounded definition: In microeconomics, the law of demand is a fundamental principle which states that there is an inverse relationship between price and quantity demanded. In microeconomics, the law of demand is a fundamental principle which states that there is an inverse relationship between price and quantity demanded. In other words, "conditional on all else being equal, as the price of a good increases (↑), quantity demanded will decrease (↓); conversely, as the price of a good decreases (↓), quantity.
Scope of Application¶
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Overview. This graphical illustration is still used today to define and explain a variety of other concepts and theories in economics.
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History. The famous law of demand was first stated by Charles Davenant (1656-1714) in his essay, "Probable Methods of Making People Gainers in the Balance of Trade (1699)".
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History. Economist also see Alfred Marshall as the pioneer of the standard demand and supply diagrams and their use in economic analysis including welfare applications and consumer surplus.
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Mathematical description. Consider the function Qx = f(Px ; \mathbf Y) , where Qx is the quantity demanded of good x , f is the demand function, \frac{\partial f}{\partial Px}.
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Mathematical description. Which is a functional relationship where the quantity demanded by the consumer Qdx depends on the price of the good Px , the monetary income of the consumer I , the prices of.
Clarity¶
A clear use of Law of Demand names the carrier, the operative relation, and the conditions under which the source treats the identity as present. The minimal definition is In microeconomics, the law of demand is a fundamental principle which states that there is an inverse relationship between price and quantity demanded.
Manages Complexity¶
Law of Demand compresses multiple social sciences, humanities, and arts details into a stable diagnostic relation. The source shows both the central mechanism—which is a functional relationship where the quantity demanded by the consumer Qdx depends on the price of the good Px , the monetary income of the consumer I , the prices of other goods Py , and the taste of the consumer T .—and the practical consequence—the formulation.
Abstract Reasoning¶
- Type the carrier. Identify the social sciences, humanities, and arts entities to which the claim applies.
- State the relation. Use the source-grounded identity: In microeconomics, the law of demand is a fundamental principle which states that there is an inverse relationship between price and quantity demanded.
- Check operation and conditions. A change in demand is indicated by a shift in the demand curve.
- Demand recognition evidence.
Knowledge Transfer¶
Within the home domain. Knowledge about Law of Demand transfers literally when a new case preserves the same carrier type, relation, and recognition test. This graphical illustration is still used today to define and explain a variety of other concepts and theories in economics. The famous law of demand was first stated by Charles Davenant (1656-1714) in his essay, "Probable Methods of Making People Gainers in the Balance of Trade (1699)". Beyond the home domain. No canonical parent is asserted for Law of Demand.
Relationships to Other Abstractions¶
Current abstraction Law of Demand Domain-specific
Parents (1) — more general patterns this builds on
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Law of Demand presupposes Demand Prime
The law of demand states an inverse relation between price and quantity demanded.
Hierarchy path (1) — routes to 1 parentless root
- Law of Demand → Demand → Preference
Neighborhood in Abstraction Space¶
Law of Demand sits in a moderately populated region (47th percentile for distinctiveness): it has near-neighbors but no dense thicket of look-alikes.
Family — Classical & Trade Economic Theory (20 abstractions)
Nearest neighbors
- Household production function — 0.88
- Marginal demand — 0.88
- Law of increasing costs — 0.86
- Economic democracy — 0.86
- Blackstone's ratio — 0.86
Computed from structural-signature embeddings · 2026-10-08