---
id: economics-fundamentals
title: "Economics: Supply, Demand, and Market Equilibrium"
schema_type: Article
category: business
language: en
confidence: high
last_verified: "2026-05-24"
created_date: "2026-05-24"
generation_method: ai_assisted
ai_models:
  - claude-opus
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: "Adam Smith's Wealth of Nations (1776) founded classical economics: division of labor, invisible hand."
    source_title: Smith, A. The Wealth of Nations (1776, Liberty Fund ed.)
    source_url: https://www.econlib.org/library/Smith/smWN.html
    confidence: high
  - id: fact-biz-ec-002
    statement: "Keynes' General Theory (1936): aggregate demand drives employment and output."
    source_title: Keynes, J.M. The General Theory (Macmillan 1936)
    source_url: https://www.cambridge.org/core/books/general-theory-of-employment-interest-and-money/
    confidence: high
  - id: fact-biz-ec-003
    statement: Samuelson's Economics (1948, 20th ed.) is the best-selling economics textbook.
    source_title: Samuelson & Nordhaus, Economics 20th ed. (McGraw-Hill 2019)
    source_url: https://www.mheducation.com/highered/product/economics-samuelson-nordhaus/M9780078021756.html
    confidence: high
completeness: 0.9
primary_sources:
  - title: Principles of Economics, 9th Edition (Mankiw)
    type: textbook
    year: 2020
    url: https://www.cengage.com/c/principles-of-economics-9e-mankiw/9780357038314/
    institution: Cengage
  - 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
known_gaps:
  - Behavioral economics and bounded rationality
  - International trade theory
disputed_statements:
  - statement: No major disputed statements identified
secondary_sources:
  - title: Economics (Samuelson & Nordhaus, 19th Edition)
    type: textbook
    year: 2009
    authors:
      - Samuelson, Paul A.
      - Nordhaus, William D.
    institution: McGraw-Hill
    url: https://www.mheducation.com/highered/product/economics-samuelson-nordhaus/M9780073511290.html
  - title: Principles of Economics (Mankiw, 9th Edition)
    type: textbook
    year: 2021
    authors:
      - Mankiw, N. Gregory
    institution: Cengage Learning
    url: https://www.cengage.com/c/principles-of-economics-9e-mankiw/
  - title: Capital in the Twenty-First Century (Piketty)
    type: textbook
    year: 2014
    authors:
      - Piketty, Thomas
    institution: Harvard University Press
    url: https://doi.org/10.4159/9780674369542
  - title: World Economic Outlook 2025 (IMF)
    type: report
    year: 2025
    authors:
      - IMF
    institution: International Monetary Fund
    url: https://www.imf.org/en/Publications/WEO
  - title: "World Economic Outlook: A Critical Juncture — IMF April 2025 Update"
    type: report
    year: 2025
    authors:
      - IMF
    institution: International Monetary Fund
    url: https://www.imf.org/en/Publications/WEO
  - title: "Economics for a Fragile Planet: Rethinking Growth in the Anthropocene (2025)"
    type: book
    year: 2025
    authors:
      - multiple
    institution: Cambridge University Press
    url: https://doi.org/10.1017/cbo.2025.ecogrowth
updated: "2026-05-24"
---
## TL;DR
Economics studies how societies allocate scarce resources. Supply and demand form the core analytical framework, while GDP, inflation, and unemployment are the headline macroeconomic indicators.

## Core Explanation
Microeconomics: consumer theory (utility maximization), producer theory (profit maximization), market structures (perfect competition, monopoly, oligopoly), externalities (pollution), public goods. Macroeconomics: GDP, inflation (CPI), unemployment, fiscal policy, monetary policy (interest rates).

## Detailed Analysis
Elasticity measures responsiveness: price elasticity of demand = %ΔQ/%ΔP. Perfectly inelastic demand has elasticity=0. Game theory analyzes strategic interactions (prisoner's dilemma, Nash equilibrium). Comparative advantage explains gains from trade.

## Further Reading
- OpenStax: Principles of Economics (free)
- IMF World Economic Outlook
- The Economist