Price Theory & Market Equilibrium

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Abstractions about how prices and markets are modeled in economics, covering demand and equilibrium theory (demand curve, general equilibrium theory, Heckscher-Ohlin model), price-setting and market-power concepts (competitor indexing, duopsony, marginal profit), and measurement or welfare tools (market basket, isovalue lines, welfare cost of business cycles).

13 abstractions in this family — domain-specific abstractions that sit near one another in structural-signature space (k-means over structural-signature embeddings). Each is shown with its short description.

• Competitor indexing — A pricing method that pegs a firm's price by formula to a specified competitor's comparable observed price, within explicit strategic and economic guardrails.
• Critical Consumerism — Deliberate buying, boycotting, or substitution guided by ethical, environmental, labor, social, or political judgments about products and producers.
• Demand curve — A ceteris-paribus price–quantity representation for a specified good and buyer population, distinguishing movement from nonprice-induced shifts.
• Duopsony — A procurement market dominated by two strategic buyers whose concentrated demand and suppliers’ limited outside options confer material power over purchase prices, quantities, or contract terms.
• General equilibrium theory — An economic framework that solves for mutually compatible prices, production, and allocations across all modeled markets by imposing agent optimization and simultaneous market clearing.
• Heckscher–Ohlin Model — A general-equilibrium trade model in which countries export goods that intensively use their relatively abundant factors and import goods intensive in relatively scarce factors, conditional on the model's maintained assumptions.
• Intermarket Segmentation — A cross-national segmentation method that groups consumers in different countries by shared needs and buying behavior, then targets those segments with integrated positioning that is not bounded by national markets.
• Isovalue lines — A straight constant-market-value contour in two-good quantity space, defined by V = PₓQₓ + PᵧQᵧ and ordered in a parallel family with slope −Pₓ/Pᵧ at fixed prices.
• Marginal Profit — The change in profit generated by a small or one-unit increase in output, equal under differentiable conditions to marginal revenue minus marginal cost and used to locate an interior profit maximum.
• Market basket — A documented weighted bundle of goods and services priced across times or places to measure inflation, purchasing power, affordability, or cost change.
• Shephard's Lemma — The duality result that differentiating a regular expenditure or cost value function with respect to a price recovers the associated Hicksian good demand or conditional factor demand.
• Weight Fraud — Deceptive misrepresentation of a product or shipment’s weight—through false labels, manipulated scales, included packaging, retained water or adulterants, or misstated freight data—to obtain an improper economic advantage.
• Welfare Cost of Business Cycles — The consumption-equivalent reduction in welfare attributed to macroeconomic fluctuations, measured by the uniform consumption change that makes an agent or social criterion indifferent between a cyclical path and a specified smoother counterfactual.