Explain how a market connects buyers and sellers
Describe markets, their participants and how exchange signals influence resource allocation.
Section 2.1 · The role of markets in allocating resources
Cambridge IGCSE Economics 0455 / IGCSE (9–1) Economics 0987, 2027–2029 Version 1. Apply each model to the stated evidence and qualify conclusions where effects depend on context. Practice is original and self-checked; it is not a Cambridge paper, mark scheme or official grade.
Before you begin
- No prior economics study is assumed. Read the scenario for the decision-maker, the market or economy involved, the time period and the evidence supplied.
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
What role do buyers play in a product market?
What you will learn
- Define a market
- Identify buyers and sellers
- Explain how markets contribute to allocation
Markets coordinate exchange
A market brings buyers and sellers together to exchange goods, services or resources. It can be a physical place or an online system; a market does not require a single shop or building.
Buyers express demand and sellers offer supply. Prices and sales can provide information and incentives that influence what firms produce and how resources are used.
A signal is not a complete answer
A rising price can encourage producers to supply more and buyers to reconsider purchases, but adjustment depends on competition, information, income and time.
Markets do not guarantee outcomes that are fair or efficient in every case. Later sections examine market power and market failure.
Pause and explain
What can a sustained rise in a product's price signal?
Worked example
An online platform matches local tutors with families. Identify the market participants and one allocation signal.
Show the worked solution
- Families are buyers of tutoring services.
- Tutors are suppliers of labour and lessons.
- Prices, bookings and waiting times can signal demand relative to supply.
Answer Families buy tutoring and tutors supply it. A higher price or longer waiting list may signal excess demand and influence entry or hours, though the response depends on costs and alternatives.
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Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
A farmer sells vegetables through a weekly market and an app. Explain why these can be parts of the same product market.
Give me a hint
Focus on the good and exchange, not the location.
Compare my reasoning
- Both channels connect vegetable buyers and sellers.
- They provide ways to compare offers and transact.
- Differences in access or delivery may still matter.
Both can be channels in the vegetable market because they coordinate exchange of the same product. Delivery, information and customer groups may differ between channels.
Look for these in your work
- Common product identified
- Exchange explained
- Channel differences qualified
A shortage of qualified electricians raises wages. Explain one way this market signal could affect resource allocation.
Give me a hint
Consider the incentive for workers and firms.
Compare my reasoning
- Higher wages may attract training or entry.
- Firms may substitute other methods or redesign tasks.
- The response depends on time and training requirements.
Higher wages can encourage some workers to train or enter the occupation, while firms may alter production. The effect depends on training time and whether workers can move into the role.
Look for these in your work
- Signal connected to incentives
- At least one response named
- Time or mobility considered
A medicine market has one supplier and some patients cannot afford the price. Explain why the price signal alone does not settle whether allocation is socially desirable.
Give me a hint
Separate willingness and ability to pay from broader welfare and market structure.
Compare my reasoning
- Price reflects demand backed by purchasing power.
- Market power may restrict choice or raise prices.
- Health effects and access may matter to society beyond sales revenue.
The price allocates according to purchasing power and seller decisions, but patients' health needs, market power and access also matter. A market signal alone cannot establish that the outcome maximises social welfare.
Look for these in your work
- Purchasing power noted
- Market structure considered
- Welfare criterion explained
Common mistakes
- Defining a market only as a physical location
- Treating price as the only information available
- Assuming a market outcome is automatically fair
What can you explain now?
Can an online platform form a market?
Compare with the explanation
Yes, if it coordinates buyers and sellers
A market can be organised digitally.
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Make it stick
Can an online platform form a market?
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