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Cambridge IGCSE 0455 · Unit 5 · Topic 5.2

Poverty

Cambridge IGCSEIGCSE 0455Free revision notes

Contents: 12 sections

Absolute and relative poverty

Two Lorenz curves plotted against the line of perfect equality, with cumulative shares of income and of households on the axes. The further a curve bows away from that diagonal, the more unequally income is spread.
Two Lorenz curves plotted against the line of perfect equality, with cumulative shares of income and of households on the axes. The further a curve bows away from that diagonal, the more unequally income is spread.OpenStax, Principles of Economics 3e, CC BY 4.0, section 15.4
Diagram walkthrough · 2 minBuilding a Lorenz curve axis by axisJason WelkerThe setup done properly, which is where most Lorenz curve marks are lost. Cumulative percentage of total income goes on the vertical axis, cumulative percentage of population in quintiles on the horizontal, and both run 0 to 100 in fifths, which is why the diagram is a square. The assumption underneath is that a nation's whole income is shared by its whole population, so every Lorenz curve must pass through the top right corner where 100% of people have 100% of income.
Absolute povertyRelative poverty
MeaningIncome too low to afford basic necessities: food, clean water, shelter, clothingIncome well below the average in that society
Measured againstA fixed international poverty lineA proportion of median income in that country
Can it be eliminated?Yes, in principle, through economic growth and redistributionNo: there will always be people below the average
Found inMainly low-income countriesEvery country, including rich ones

The key insight: a household can be relatively poor in a rich country while having a far higher income than someone in absolute poverty elsewhere. The two measure different things, one measures survival, the other measures exclusion from normal life in your own society.

This also explains a result that looks strange at first: economic growth can lift millions out of absolute poverty while relative poverty stays the same or worsens, because the benchmark rises with average income.

Causes of poverty

  1. Low income
  2. little or no saving
  3. no money to invest in education, health or tools
  4. low productivity
  5. low income again.

Breaking that cycle is what most anti-poverty policy is really trying to do.

Policies to reduce poverty

PolicyHow it helpsDrawback
Economic growthCreates jobs and raises incomes; raises tax revenue to fund servicesGains may go mainly to the rich; environmental cost
Progressive taxation and benefitsTransfers income from higher to lower earnersMay weaken work incentives; costly to administer
National minimum wageRaises the lowest wagesMay cause unemployment if set too high; only helps those in work
Education and trainingRaises skills, productivity and future earnings: attacks the poverty cycle at its rootVery slow: takes a generation: and expensive
Free or subsidised healthcareKeeps people able to work; prevents medical costs pushing families into povertyExpensive; opportunity cost
Improved infrastructureAccess to water, power and transport raises productivityLarge upfront cost
State pensionsProtects the elderlyCostly as populations age
Microfinance / small loansLets poor households start businessesSmall scale; interest rates can be high

The recurring trade-off: measures that redistribute income work quickly but may weaken incentives and must be funded; measures that raise productivity work slowly but are more durable. The strongest answers say a combination is needed.

Worked example

A low-income country wants to reduce poverty.

  1. Many families lack the money to keep children in school
  2. children leave early and take low-skilled work
  3. they earn little as adults and cannot afford schooling for their own children
  4. the poverty cycle repeats across generations.

Two policies compared:

Judgement. Transfers relieve poverty now; education prevents it later. A government facing severe poverty realistically needs both, which is precisely why conditional cash transfers, paying families on condition that children attend school, have become a common policy.

Common exam mistakes

Exam technique

Define both types of poverty precisely when the question asks for a distinction; that is usually a 4-mark question with two marks each.

For causes, group them: no income (unemployment, old age, illness), low income (low wages, few skills), and structural (discrimination, poor infrastructure, conflict).

For policies, always pair a fast-acting redistributive measure with a slow-acting productivity measure, and say why both are needed.

Building an answer

4 marks, "Explain the difference between absolute and relative poverty."

Absolute poverty is being unable to afford the basic necessities for survival, food, clean water, shelter, basic healthcare. It is measured against a fixed line, such as the World Bank's international poverty line, and can in principle be eliminated.
Relative poverty is having an income well below the average in your own society, commonly below 60% of median income. It is measured against others, so it exists in every country regardless of how rich that country is.

6 marks, "Analyse policies a government could use to reduce poverty."

Progressive taxation and benefits transfer income from higher to lower earners directly, raising the incomes of the poorest immediately.
A national minimum wage raises the pay of the lowest-paid in work, though if set too high it may reduce the number of jobs available to exactly those workers.
Investment in education and training raises long-run earning power, attacking the cause rather than the symptom, but takes a generation to work.
Provision of free healthcare and schooling raises real living standards without raising money incomes, and prevents the illness and lost schooling that keep families poor.
The strongest answers note the trade-off: redistribution helps now but may weaken incentives, while education helps permanently but not for years.

The cycle of poverty

Worth learning as a chain, because it explains why poverty persists across generations:

  1. Low income
  2. little saving
  3. no investment in education or health
  4. low skills and poor health
  5. low productivity
  6. low income again.

Breaking the cycle requires an intervention from outside it, which is the argument for free education, healthcare and targeted aid.

Causes of poverty

Unemployment and low wages; illness or disability preventing work; lack of education and skills; discrimination limiting opportunity; conflict and instability; a weak or absent welfare system; and inherited disadvantage passed between generations.

A real case to quote

Brazil's Bolsa Família. Cash transfers to poor households conditional on children attending school and receiving vaccinations. It reduced poverty immediately through the transfer, and attacked the cycle through the conditions, an unusually clean example of a policy aimed at both the symptom and the cause at once.

Quick revision

Check you have it

Question 1

Which policy is most likely to reduce relative poverty?

Question 2

Which statement about poverty is correct?

Question 3

What is most likely to cause an increase in relative poverty?

More questions on poverty →
What the syllabus asks for on this topicSyllabus points

Syllabus points

  • Distinguish absolute from relative poverty.
  • Explain the causes of poverty.
  • Explain policies to reduce poverty.

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