Introduction to Economics
Senior 4 · Economics
Introduction to Economics
Lesson 2 of 3
19 min
Rwanda grows coffee, phones are imported, new apartments rise in Kigali, and somewhere a decision was made to do all of this rather than something else. Who made those decisions? In some countries the answer is ‘millions of buyers and sellers, with no one in overall charge’. In others it was ‘a government ministry’. Most countries, Rwanda included, sit somewhere in between.
Because resources are scarce, every society must decide how to use them — and the method it chooses shapes daily life: what is in the shops, who has a job, how wide the gap is between rich and poor. This lesson sets out the three questions every economy must answer and the three broad systems used to answer them, so that later, when you study markets and government policy, you understand the framework they sit inside.
Scarcity means no economy can produce everything, so every society — whatever its politics — must answer three questions:
Economic systems differ mainly in who answers these questions and how.
In a free-market economy the questions are answered not by any planner but by the price mechanism — the free movement of prices in thousands of markets. Resources are privately owned, and each person acts in their own self-interest: consumers buy what gives them most satisfaction, and firms produce whatever earns most profit.
Prices act as signals. If consumers want more of a good, they bid its price up; the higher price raises profits, so firms produce more and resources move towards it. If a good is unwanted, its price falls and resources drain away. The 18th-century economist Adam Smith called this self-organising tendency the invisible hand: each person pursues their own gain, yet the outcome is that society’s resources flow to where they are most valued, with no one directing them.
Strengths: strong incentives to work and innovate, because you keep the reward; efficiency, because loss-making activities are quickly abandoned; and wide consumer choice. Weaknesses: those with no money to spend get little, so inequality can be severe; goods that benefit everyone but are hard to charge for — street lighting, national defence — are under-provided; and harmful side-effects such as pollution are ignored because no price captures them.
In a planned economy the state owns the factors of production and a central authority answers the three questions directly. A government plan decides how much of each good to make (what), assigns workers and machines to state enterprises (how), and distributes output through fixed prices or rationing (for whom).
Strengths: the state can aim for a fair distribution and guarantee everyone basic goods and work, and it can provide the everyone-benefits goods a market neglects. Weaknesses: with no profit to chase, incentives to work hard or innovate are weak; planners cannot possibly track the needs of millions of people, so shortages of some goods and mountains of unwanted others are common; and consumers must take what they are given.
A mixed economy combines the two: most goods are produced and allocated by the market, but the government intervenes where the market fails or where fairness demands it — providing public goods, running schools and hospitals, regulating firms, taxing the better-off and supporting the poor. In reality every modern economy is mixed; they differ only in how far the state reaches.
Take a single good, maize, and ask how each system answers the three questions.
Rwanda operates a mixed economy with a deliberately private-sector-led model of growth. Most production is by private firms and farmers responding to prices, and the country actively encourages private investment. At the same time the government plays a large role: it builds roads and power lines, provides public education and healthcare, and regulates key sectors — for example RURA, the Rwanda Utilities Regulatory Authority, oversees utilities and transport, and public programmes support agriculture and the poorest households. Market forces and government direction work side by side, which is exactly what ‘mixed’ means.
Tip
Exam technique. If you are asked to compare economic systems, do not just list features — organise your answer around the three questions (what, how, for whom) and around ‘who owns the resources and who decides’. And resist writing that any real country is ‘purely’ free-market or ‘purely’ planned: every actual economy is mixed, so treat the two pure cases as the ends of a scale on which real countries are placed.
State the three basic economic questions every society must answer.
In a free-market economy, explain briefly how a rise in consumers’ demand for eggs leads to more eggs being produced, without any government instruction.
Give one strength and one weakness of a planned economy.
A private firm decides not to build a lighthouse even though ships value it, because it cannot charge passing ships for the light. Which weakness of the free market does this illustrate?
What to produce, how to produce it, and for whom to produce it. All three arise directly from scarcity.
Higher demand for eggs pushes the price of eggs up. The higher price raises the profit from selling eggs, so existing farmers keep more hens and new farmers enter. Resources move towards eggs — all guided by the price signal, the invisible hand, with no planner involved.
A strength: the state can aim for a fairer distribution and guarantee everyone basic goods and employment. A weakness: with no profit incentive, and no way for planners to track millions of wants, effort tends to be low and shortages and surpluses are common. (Either point, clearly explained, earns the marks.)
It illustrates the under-provision of public goods — goods that benefit many people but from which non-payers cannot be excluded, so no profit-seeking firm will supply them. This is a standard reason a pure free market needs a government, and hence why real economies are mixed.
Summary — the ideas to carry forward
