---
id: economics-fundamentals
title: "Economics: Supply, Demand, and Market Equilibrium"
schema_type: Article
category: business
language: en
confidence: medium
last_verified: "2026-05-28"
created_date: "2026-05-24"
generation_method: ai_structured
ai_models:
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derived_from_human_seed: true
conflict_of_interest: none_declared
is_live_document: false
data_period: static
atomic_facts:
  - id: fact-biz-ec-001
    statement: "OpenStax explains market equilibrium as the price and quantity where demand and supply intersect."
    source_title: Demand, Supply, and Equilibrium in Markets for Goods and Services
    source_url: https://openstax.org/books/principles-economics-3e/pages/3-1-demand-supply-and-equilibrium-in-markets-for-goods-and-services
    confidence: medium
  - id: fact-biz-ec-002
    statement: "MIT OpenCourseWare 14.01 covers supply and demand, market equilibrium, consumer theory, production, market structure, public goods, and externalities."
    source_title: MIT 14.01 Principles of Microeconomics
    source_url: https://ocw.mit.edu/courses/14-01-principles-of-microeconomics-fall-2023/
    confidence: medium
  - id: fact-biz-ec-003
    statement: "OpenStax's chapter summary describes using supply and demand diagrams to compare initial and new equilibrium prices and quantities after a demand or supply shift."
    source_title: Demand and Supply Key Concepts and Summary
    source_url: https://openstax.org/books/principles-economics-3e/pages/3-key-concepts-and-summary
    confidence: medium
completeness: 0.82
known_gaps:
  - Behavioral economics and bounded rationality
  - International trade theory
disputed_statements: []
primary_sources:
  - title: Demand, Supply, and Equilibrium in Markets for Goods and Services
    type: textbook
    year: 2022
    url: https://openstax.org/books/principles-economics-3e/pages/3-1-demand-supply-and-equilibrium-in-markets-for-goods-and-services
    institution: OpenStax
  - title: MIT 14.01 Principles of Microeconomics
    type: course_material
    year: 2023
    url: https://ocw.mit.edu/courses/14-01-principles-of-microeconomics-fall-2023/
    institution: MIT OpenCourseWare
  - title: Demand and Supply Key Concepts and Summary
    type: textbook
    year: 2022
    url: https://openstax.org/books/principles-economics-3e/pages/3-key-concepts-and-summary
    institution: OpenStax
secondary_sources: []
updated: "2026-05-28"
---

## TL;DR

Supply and demand provide a basic model for explaining how competitive markets move toward equilibrium prices and quantities.

## Core Explanation

Demand describes the quantities buyers are willing and able to purchase at different prices. Supply describes the quantities sellers are willing and able to offer. In the standard diagram, their intersection gives the market equilibrium.

## Detailed Analysis

Shifts in demand or supply change the equilibrium. Introductory microeconomics then extends the same toolkit to consumer choice, production decisions, monopoly, oligopoly, public goods, externalities, and welfare analysis.

## Further Reading

- [OpenStax: Demand, Supply, and Equilibrium](https://openstax.org/books/principles-economics-3e/pages/3-1-demand-supply-and-equilibrium-in-markets-for-goods-and-services)
- [MIT 14.01 Principles of Microeconomics](https://ocw.mit.edu/courses/14-01-principles-of-microeconomics-fall-2023/)

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