Introduction to Economics

Introduction to Economics

🟢 Lite — Quick Review (1h–1d)

Rapid summary for last-minute revision before your exam.

Economics is the social science that studies how scarce resources are allocated among competing uses to satisfy unlimited wants. The twin foundations of the subject are scarcity (resources are limited) and choice (because resources are limited, picking one thing means giving up another). Opportunity cost — the benefit of the next best alternative foregone — is therefore the true cost of every decision, not the money paid.

Every economy must answer what to produce, how to produce, for whom to produce, how much to produce, and when to produce. The factors that combine to produce goods and services are land, labour, capital and entrepreneurship. The three basic economic activities are production, consumption and distribution. The subject is split into microeconomics (individual units such as a household or firm) and macroeconomics (aggregate variables such as national income, inflation and unemployment). Statements are either positive (testable facts) or normative (value judgements).

🟡 Standard — Regular Study (2d–2mo)

Standard content for students with a few days to months.

Meaning and Scope of Economics

Economics is the social science concerned with how individuals, firms, governments and societies use scarce resources to produce goods and services that satisfy unlimited human wants. Its scope covers production, exchange, distribution and consumption of wealth, and extends from household budgeting to national planning.

Why Economics Exists: Scarcity and Choice

Scarcity means resources are finite while human wants are infinite. This forces every economic agent to make choices and to face opportunity cost, calculated as the benefit of the next best alternative foregone. For example, if a government spends GH¢10 million on a new hospital, the opportunity cost is the road network that will not be built with that money.

Basic Questions of an Economy

Every economic system must decide:

• What goods and services to produce
• How to produce them (which techniques and combinations of resources)
• For whom to produce (the distribution pattern)
• How much to produce
• When to produce

Factors of Production

Factor	Reward	Examples
Land	Rent	Farmland, minerals, forests
Labour	Wages	Manual and skilled work
Capital	Interest	Tools, machines, buildings
Entrepreneurship	Profit	Risk-bearing, innovation

Goods, Needs and Wants

Needs are basic requirements for survival (food, shelter); wants are desires that go beyond needs. Free goods (e.g. air) are naturally abundant, while economic goods are scarce and command a price.

Branches and Approaches

Microeconomics analyses individual units — a single consumer, firm or market. Macroeconomics studies the economy as a whole — GDP, inflation, unemployment, balance of payments. Positive economics describes what is (testable), while normative economics prescribes what ought to be (value-based).

Typical WASSCE Question Patterns

• Define economics and state the central economic problem.
• Distinguish between needs and wants, or between free and economic goods.
• List and explain the factors of production and their rewards.
• Differentiate microeconomics from macroeconomics, and positive from normative economics.

🔴 Extended — Deep Study (3mo+)

Comprehensive coverage for students on a longer study timeline.

The Central Economic Problem in Depth

The central problem is not poverty alone but the mismatch between finite resources and unlimited wants. Because resources have alternative uses, every selection has a cost measured by what is sacrificed. This is why scale of preference — a ranked list of wants in order of urgency — is the starting point of rational economic decision-making: a consumer first satisfies the most pressing want before moving to the next.

Resources Re-examined

In economics, land includes all natural resources, not just soil: rivers, oil, sunshine and mineral deposits. Capital refers only to man-made aids to production (machinery, factories), not money, which is financial capital. Entrepreneurship is a separate factor because it provides the coordinating ability that the other three factors lack on their own — the entrepreneur organises land, labour and capital and bears the risk of loss.

Production Concepts

Total output can be broken down using:

• Total Product (TP) = sum of all units produced
• Average Product (AP) = TP ÷ units of input
• Marginal Product (MP) = change in TP ÷ change in input

These measures show whether a firm is operating in stages of increasing, constant or diminishing returns — a vital link to later topics on production and costs.

Cost Relationships

TC = TFC + TVC, and AC = TC ÷ Output. Knowing these identities lets you manipulate cost-revenue questions in Paper 2.

Common Mistakes to Avoid

• Defining opportunity cost as “money spent” — it is the next best alternative foregone.
• Saying “inflation” is a microeconomic issue — it is macroeconomic.
• Mixing up positive and normative statements; for instance, “Government should reduce taxes” is normative, while “Government reduced taxes by 2%” is positive.
• Treating land as only farmland, or treating money as capital.
• Using need and want interchangeably in exam answers.

Practice Prompts

1. Explain why the problem of scarcity makes choice and opportunity cost necessary in any economy.
2. Distinguish between positive and normative economics, giving two examples of each from Ghana’s economy.

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