3Q SOCSCI NOTES SIMPLIFIED (3)

Introduction to Macroeconomics

  • John Maynard Keynes

    • Revolutionized macroeconomics with his ideas on government intervention.

    • Contrasted classical economists' belief in self-correcting economies.

  • Post-World War II Developments

    • Aggregated supply and demand dynamics were emphasized.

    • National income became a key measure of economic health.

Historical Context

The Great Depression (1930s)

  • Keynes' Contributions

    • Addressed unemployment by suggesting government action to stimulate demand.

    • His book, The General Theory of Employment, Interest, and Money (1936), marked a significant shift in economic thought.

  • National Income Accounting

    • Developed as a response to the need for metrics reflecting overall economic activity

    • Shifted focus from production/supply to national income metrics.

Economic Theories from the 17th and 18th Centuries

  • Sir William Petty and Gregory King

    • Advocated for measuring national income, focusing on income distribution.

  • Physiocrats

    • Believed that agriculture was the sole source of wealth.

  • Karl Marx

    • Ignored services in economic analysis, emphasizing manufacturing.

  • Colonialism and Economic Crises

    • Illustrated through the Great Irish Famine (1845-1852).

Economic Models

Keynesian Economics

  • Economy as a circular flow of income, emphasizing demand-driven growth.

  • Argued that unemployment resulted from lack of demand.

International Trade Development

  • Age of Exploration led to new trade routes, competitive free trade treaties like the Cobden-Chevalier Treaty.

  • Economic initiatives, like the US New Deal, were introduced to address structural unemployment.

19th and 20th Century Developments

  • Stagflation (1970s)

    • Characterized by slow growth, high unemployment, and inflation due to oil shocks.

  • GATT

    • Established to reduce trade barriers and promote international trade.

Economic Terms and Definitions

  • Fiscal Policy

    • Adjusts government spending and taxation to influence economy.

  • Monetary Policy

    • Involves central banking policies affecting money supply and interest rates.

  • Aggregate Demand (AD)

    • Total quantity of goods/services demanded at a specific price level.

Key Economic Concepts

Measurement of Economic Activity

  • Gross Domestic Product (GDP)

    • Total market value of goods/services produced within a country. Includes:

      • Real GDP: Adjusted for inflation.

      • Nominal GDP: Unadjusted current prices.

National Income Accounting

  • Three measurement methods:

    1. Value-Added Method.

    2. Income Method: Sum of all income earned.

    3. Expenditure Method.

Types of Unemployment

  • Frictitional: Short-term, voluntary job changes.

  • Structural: Mismatches between skills and jobs available.

  • Cyclical: Caused by economic downturns.

  • Seasonal: Variations in job availability due to season.

Inflation Concepts

  • Types of Inflation:

    • Demand-Pull: Excess demand over supply.

    • Cost-Push: Rising production costs.

    • Creeping: Gradual, manageable price increases.

    • Hyperinflation: Extremely high and typically speeding inflation.

Trade Dynamics

Types of Trade

  • Domestic Trade: Limited within national borders.

  • International Trade: Involves exchange between different countries.

  • Advantages:

    • Access to larger markets and variety of goods.

    • Specialization and improved efficiency.

Protectionism and Trade Barriers

  • Trade Barriers: Include tariffs and quotas to protect domestic industries.

  • Benefits and Downsides:

    • Protect industries but can raise consumer prices and reduce overall market efficiency.