Economy

MACROECONOMICS 101 – LECTURE NOTES

Topic: The Economy, Inflation, and Economic Growth

1. What Is the Economy?

The economy refers to the system through which goods and services are produced, distributed, and consumed within a society. It includes households, businesses, governments, and financial institutions interacting through markets.

Economists study how scarce resources are allocated to meet unlimited wants, and how decisions made by individuals and governments affect overall economic outcomes.

2. Key Economic Objectives

Most modern economies aim to achieve the following goals:

  • Economic growth – increasing the production of goods and services over time

  • Low unemployment – ensuring people who want jobs can find them

  • Price stability – keeping inflation low and predictable

  • Economic equity – reducing extreme income and wealth inequality

These objectives often conflict, meaning policymakers must make trade-offs.

3. Measuring Economic Performance

The most common measure of economic activity is Gross Domestic Product (GDP).

GDP is the total market value of all final goods and services produced within a country in a given period.

GDP can be calculated using:

  • The expenditure approach (C + I + G + (X − M))

  • The income approach

  • The production approach

Nominal GDP measures output using current prices, while real GDP adjusts for inflation and reflects true economic growth.

4. Economic Growth

Economic growth occurs when a country produces more goods and services over time, usually measured by changes in real GDP.

Sources of economic growth include:

  • Increases in labor

  • Improvements in technology

  • Capital investment

  • Higher productivity

Sustained economic growth raises living standards but may also lead to environmental concerns and inequality.

5. Unemployment

Unemployment measures the percentage of people in the labor force who are actively seeking work but cannot find employment.

Types of unemployment:

  • Frictional unemployment – temporary, between jobs

  • Structural unemployment – mismatch of skills and jobs

  • Cyclical unemployment – caused by economic downturns

A small level of unemployment is considered normal in a healthy economy.

6. Inflation

Inflation is the sustained increase in the general price level of goods and services over time.

It is commonly measured using the Consumer Price Index (CPI).

Main causes of inflation:

  • Demand-pull inflation – demand exceeds supply

  • Cost-push inflation – production costs rise

  • Built-in inflation – wage-price spiral

Moderate inflation is normal, but high inflation reduces purchasing power and creates uncertainty.

7. Monetary Policy

Monetary policy is conducted by a country’s central bank (e.g. the Federal Reserve).

Its main tools include:

  • Interest rates

  • Open market operations

  • Reserve requirements

Central banks raise interest rates to reduce inflation and lower them to stimulate economic activity.

8. Fiscal Policy

Fiscal policy refers to government decisions about taxation and spending.

  • Expansionary fiscal policy is used during recessions

  • Contractionary fiscal policy is used to slow inflation

Government budgets can influence employment, output, and overall economic stability.

9. Business Cycles

Economies tend to move in cycles consisting of:

  • Expansion

  • Peak

  • Recession

  • Trough

Policymakers attempt to smooth these cycles, but fluctuations are a natural part of economic systems.

10. Key Takeaways

  • The economy is driven by interactions between households, firms, and governments

  • GDP measures economic activity, but not overall well-being

  • Inflation and unemployment are key indicators of economic health

  • Policy decisions involve trade-offs and long-term consequences