Explain why countries differ in development
Compare income, productivity, population, sector structure, saving, investment, education, health and 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
How can investment affect productive capacity?
What you will learn
- Identify dimensions of development differences
- Explain possible causes and consequences
- Avoid single-factor or fixed-stage claims
Development is shaped by linked conditions
Countries can differ in income, productivity, population growth, the size of primary, secondary and tertiary sectors, saving and investment, education, healthcare and natural resources.
These factors interact. Education can improve skills and productivity; health can affect participation; investment can expand capital; resource availability can support output but does not alone guarantee broad development.
Compare indicators and explain mechanisms
Differences can affect incomes, employment, public services, trade and living standards. A large primary sector may have different productivity and income effects depending on technology and value added.
Avoid ranking countries from one indicator or assuming a universal path. Use comparable data and explain how a factor changes productive capacity, income or access to services.
Pause and explain
Why is a high natural-resource endowment not enough to establish high development?
Worked example
Country A has higher saving and investment but lower education access than Country B. Explain one possible development advantage and one constraint.
Show the worked solution
- Investment may increase capital and productive capacity.
- Limited education access may constrain skills and productivity.
- The net result depends on investment quality and other factors.
Answer Investment may support capital formation, while limited education can constrain the skills needed to use it well. The comparison depends on investment quality, health, technology and distribution.
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Test this topic →From guided practice to a new situation
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 country has growing school enrollment but low productivity in many firms. Explain one link and one missing condition.
Give me a hint
Connect education to skills, then consider whether firms can use them.
Compare my reasoning
- Education may improve worker skills.
- Productivity can rise if skills match production needs.
- Capital, technology and management may also be needed.
More education can strengthen human capital, but productivity gains depend on relevant skills and firms' access to capital, technology and effective organisation.
Look for these in your work
- Education mechanism stated
- Productivity link stated
- Complementary factors considered
A country shifts workers from farming to manufacturing and services. Explain one possible benefit and one risk of this structural change.
Give me a hint
Consider productivity and job quality, not sector labels alone.
Compare my reasoning
- Manufacturing or services may offer higher productivity or value added.
- Workers may need new skills or face transition unemployment.
- Outcomes depend on wages, conditions and domestic capacity.
The shift may raise output per worker if new sectors are more productive, but it can displace workers or require training. Sector change alone does not guarantee higher incomes or secure work.
Look for these in your work
- Potential benefit explained
- Transition cost explained
- Outcome qualified
A report compares two countries' income per person but ignores health and education. Explain what additional evidence would improve the comparison.
Give me a hint
Use broader development indicators and within-country distribution.
Compare my reasoning
- Compare health indicators such as life expectancy or access to care.
- Compare schooling or educational attainment.
- Check distribution, prices and comparable measurement periods.
Health and education data, income distribution and comparable price-adjusted figures would give a broader picture. A composite measure such as HDI can help but also has limits.
Look for these in your work
- Health evidence added
- Education evidence added
- Distribution/comparability noted
Common mistakes
- Treating natural resources as a guarantee of development
- Assuming a large tertiary sector proves high living standards
- Comparing figures from different years or definitions
What can you explain now?
Can productivity differences affect development?
Compare with the explanation
Yes, they can affect output and income per worker
Productivity influences how much output factors generate.
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Make it stick
Can productivity differences affect development?
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