Step 1: The Economic Problem

What scarcity means: you cannot have everything

Think about your Saturday. You would like to sleep in, revise for a test, meet friends at a café, play football and earn some money from a part-time job. But you only have one Saturday, and only so much money. You have to choose.

Whole countries face the same problem. A government wants better schools and lower taxes. A company wants higher profits and happier workers. The resources we use to make things (workers, machines, land, raw materials) are limited. Our wants are not: there is always a slightly nicer phone, a better holiday or a bigger house. The gap between unlimited wants and limited resources is called the economic problem, or simply scarcity.

Two things are often confused with scarcity:

• Scarcity is not poverty. A billionaire still faces scarcity: they cannot buy more time or perfect health. A homeless person faces it much more sharply. The underlying problem is the same: resources are limited.
• Scarcity is not a shortage. A shortage happens when a price is set too low, so buyers want more than sellers will supply at that price. Shortages come and go. Scarcity is permanent and applies to everything.

Imagine a world where everything was free and unlimited. There would be no choices, no trade, no money and no economics. Economics exists because that world does not.

The four factors of production

When economists say “resources”, they mean the inputs used to make goods and services. These are the factors of production. Everything you have ever bought was made with some mix of these four.

For labour, quality matters as much as quantity. The skills and education of workers are called human capital. A well-educated workforce has high human capital.

Three questions every economy must answer

Because resources are scarce, every society, from medieval Europe to modern Singapore, has had to answer three basic questions:

1. What to produce? More food or more cars? More healthcare or more military equipment? The economy cannot make everything, so it must decide how to share its resources between competing uses.
2. How to produce? Wheat can be harvested by hundreds of workers with hand tools (labour-intensive) or by one farmer with a combine harvester (capital-intensive). The choice depends on the relative cost of labour, capital and other inputs.
3. For whom to produce? Once goods are made, who gets them? Everyone equally? Whoever pays the most? The government? This question is about distribution, and it is usually the most hotly debated of the three.

Opportunity cost: the real cost of a choice

Because resources are scarce, every choice means giving something up. If you spend Saturday revising, you cannot also spend it at the beach. If a government spends one billion dollars on a new airport, that money cannot also go on hospitals or schools. Economists call the value of what you give up the opportunity cost.

Notice two words: next-best. Opportunity cost is not the value of every alternative added together. It is the value of the single best option you turned down. It is also measured in what you gave up, not what you got. It is zero only if there were no alternatives at all.

Opportunity cost applies to time and attention, not just money. That is why economists say “there is no such thing as a free lunch”: even a free lunch takes time that you could have spent on something else.

The same idea works with time and output. Suppose 1 tonne of wheat takes 2 hours of labour and 1 metre of cloth takes 4 hours. The 4 hours spent on one metre of cloth could have made \( 4 \div 2 = 2 \) tonnes of wheat. So the opportunity cost of 1 metre of cloth is 2 tonnes of wheat.

Who decides? Economic systems and two key distinctions

Societies answer the three questions in different ways. The way a society allocates its scarce resources is called its economic system. There are three types, and real countries sit somewhere along a spectrum:

• Command (planned) economy: the government decides what, how and for whom. The Soviet Union was the largest historical example, and North Korea is the closest today.
• Market (free) economy: private individuals and firms decide, guided by prices. Hong Kong and Singapore come closest among modern countries.
• Mixed economy: markets make most decisions, but the government provides public goods, regulates and redistributes income. Almost every developed country is mixed. Countries differ in how much the government does, not in whether it does anything.

You will study these systems properly in Step 4.

Positive vs normative. A positive statement describes what is or what will happen, and evidence can test it: “Raising the minimum wage to $15 will reduce low-skilled employment by 3%.” A normative statement says what ought to be, and depends on values: “The minimum wage should be raised to $15.” Two people can agree on every fact and still disagree on what should be done.

Micro vs macro. Microeconomics studies individuals, households, firms and single markets, such as how a coffee shop sets its prices. Macroeconomics studies the whole economy: growth, inflation, unemployment. Micro studies the trees; macro studies the forest.

Models and ceteris paribus. The real world is too complicated to study all at once, so economists use models: simplified versions of reality. A model is like a subway map. It is useful because it leaves things out. Models usually assume ceteris paribus, Latin for “other things being equal”: we change one thing and hold everything else constant, so we can see one effect at a time.

Practise: 6 questions

Try each one on paper first, then check the worked answer.

Check yourself

The short version

• Scarcity, the gap between unlimited wants and limited resources, is why economics exists.
• The four factors of production are land, labour, capital and enterprise. They earn rent, wages, interest and profit.
• Every economy must decide what to produce, how to produce it and for whom.
• Opportunity cost is the value of the single next-best alternative given up. Every choice has one.
• Positive statements can be tested; normative statements are value judgements. Micro studies single markets; macro studies the whole economy. Models use ceteris paribus to isolate one effect at a time.

This guide covers the core of Chapter 1 of Economics Made Simple. The full chapter adds the Sri Lanka 2022 case study, more worked examples and a 15-question exam practice set with a full answer key.