Microeconomics

Uncover individual economic decisions, supply-demand dynamics, and market behaviors that drive our world.

Feature image for “Marginal Rate of Technical Substitution,” showing an isoquant diagram with a steep tangent for large MRTS and a flatter tangent for small MRTS.

Microeconomics

Marginal Rate of Technical Substitution: Isoquant Slope

The marginal rate of technical substitution is the slope of an isoquant, equal to the ratio of marginal products, and...

June 3, 2026

Feature image for “Walrasian Equilibrium in an Edgeworth Box,” showing a competitive equilibrium where one relative price coordinates two traders from endowment E to equilibrium E* on the contract curve.

Microeconomics

Walrasian Equilibrium Edgeworth Box

A Walrasian equilibrium Edgeworth box shows how one relative price coordinates two traders: a budget line pivoting through the endowment...

June 1, 2026

Feature image for “Edgeworth Box Examples,” showing a worked exchange problem where trade moves from endowment E to the efficient equilibrium E* on the contract curve.

Microeconomics

Edgeworth Box Examples: Solving Exchange Step by Step

Worked Edgeworth box examples turn the diagram into a procedure: from endowment and preferences to the equilibrium price and final...

June 1, 2026

Feature image for “Pareto Set vs Contract Curve,” showing an Edgeworth box where the full Pareto set runs through the box, while the contract curve is only the reachable efficient segment inside the lens through endowment point E.

Microeconomics

Pareto Set vs Contract Curve: Welfare Geometry Explained

The Pareto set vs contract curve confusion comes down to one thing: the Pareto set is every efficient allocation, the...

June 1, 2026

Feature image for “Public Goods and Private Goods,” showing a rivalry-excludability grid that classifies private goods, club goods, common-pool resources, and public goods.

Microeconomics

Public Goods vs Private Goods: Rivalry, Excludability, Free-Rider Problem

Rivalry and excludability separate public goods vs private goods, and the free-rider problem explains why markets undersupply non-excludable goods that...

May 26, 2026

Feature image for “Elasticity of Substitution,” showing how different sigma values correspond to different isoquant shapes and input flexibility.

Microeconomics

Elasticity of Substitution: Measuring Input Flexibility

The elasticity of substitution measures how readily a firm swaps one input for another when relative prices change, governing factor...

May 26, 2026

Feature image for “Cross-Price Elasticity,” showing how the sign of cross-price elasticity distinguishes substitutes from complements.

Microeconomics

Cross-Price Elasticity of Demand: Substitutes, Complements, and Strategic Pricing

Cross-price elasticity of demand measures how one good's quantity responds when another's price changes. The sign identifies substitutes and complements;...

May 26, 2026