Poverty, Inequality & Living Standards

Absolute vs relative poverty, Lorenz curve, Gini coefficient, HDI, causes of inequality & significance of capitalism

SPEC 4.2 • POVERTY AND INEQUALITY

Key Definitions

Absolute Poverty

When individuals lack the income to meet basic needs such as food, shelter and clothing. Measured against a fixed threshold — World Bank line: $2.15/day (PPP-adjusted). Does not change with national living standards.

Relative Poverty

When individuals have income significantly below the average in their society — unable to participate in normal living standards. Typically: below 60% of median household income. Changes as average incomes change.

Gini Coefficient

A measure of income inequality ranging from 0 (perfect equality) to 1 (perfect inequality). UK ≈ 0.35. Nordic ≈ 0.27. South Africa ≈ 0.63.

Lorenz Curve

A graphical representation of income distribution — the further it bows from the line of perfect equality, the greater the inequality.

Absolute vs Relative Poverty

FeatureAbsolute PovertyRelative Poverty

ThresholdFixed ($2.15/day World Bank)Relative (60% median income)

Changes with growth?Falls as incomes rise (if distribution stable)May not fall — depends on distribution

Global trendFallen dramatically since 1990 (China, India)Risen in many OECD countries

Policy focusEconomic growth, basic provisionRedistribution, progressive taxation

Critical Evaluation Point

Improvements in absolute poverty statistics can mask worsening relative deprivation within countries. A country can grow richer and still have more relative poverty if inequality widens. "A rising tide lifts all boats — but only if the boats are connected to the same tide."

Lorenz Curve Diagram

Diagram required for top marks. You must be able to draw and interpret this.

Gini = A ÷ (A + B)

How to Read It

The more the Lorenz curve bows away from the line of equality, the larger Area A, the higher the Gini, and the greater the inequality. A policy that reduces inequality moves the curve closer to the diagonal.

Gini Coefficient

Gini = Area A ÷ (Area A + Area B)

Gini ValueMeaningExample Countries

0Perfect equality — everyone earns the sameTheoretical only

0.25–0.30Low inequalityNordic countries (Sweden ≈ 0.27)

0.30–0.40Moderate inequalityUK ≈ 0.35, Germany ≈ 0.32

0.40–0.55High inequalityUSA ≈ 0.41, China ≈ 0.47

0.55+Very high inequalitySouth Africa ≈ 0.63, Brazil ≈ 0.53

1Perfect inequality — one person earns everythingTheoretical only

Exam Tip

The Gini is derived from the Lorenz curve — they are linked. If asked to draw a Lorenz curve, always label Area A and Area B and state the formula. Knowing approximate Gini values for key countries earns AO2 application marks.

Income vs Wealth Inequality

Income Inequality

Income = flow of earnings over a period (wages, dividends, rent, benefits). Measured by Gini coefficient and Lorenz curve. Affected by tax and benefit system, wage differentials, employment levels.

Wealth Inequality

Wealth = stock of assets at a point in time (property, shares, savings, pensions). Wealth is more unequally distributed than income in most countries. Wealth concentrates through inheritance, asset price rises, and compound returns.

Examiner Alert

Students frequently confuse income and wealth. Income is a flow (per year). Wealth is a stock (at a point in time). A retired person may have high wealth (property, savings) but low income. A young professional may have high income but low wealth (mortgage debt). The distinction matters for policy — income tax reduces income inequality; inheritance tax targets wealth inequality.

Causes of Inequality

8 Key Causes — Within & Between Countries

Wage differentials: Skills, education, productivity differences → surgeons earn more than retail workers (MRP theory)

Returns to capital: Owners of capital (shares, property) earn investment income; non-owners do not → wealth begets wealth

Tax and benefit system: Progressive taxes reduce inequality; regressive taxes (e.g. VAT) worsen it

Trade union decline: Reduced collective bargaining power → falling wage share for low-skill workers

Globalisation: Technology and trade raise returns to high-skill labour; competition depresses low-skill wages

Demographic change: Ageing population, more single-parent households → concentrated deprivation

Regional disparities: London premium vs depressed post-industrial regions

Intergenerational wealth transfer: Inherited wealth concentrates ownership across generations

Significance of Capitalism

The spec explicitly requires you to evaluate the significance of capitalism for inequality.

Capitalism Increases Inequality

Private ownership of capital → those who own assets accumulate wealth faster than wage earners

Profit motive → firms minimise labour costs → wage suppression for low-skill workers

Market forces reward scarce skills/talents disproportionately → CEO pay vs median worker pay

Inherited wealth creates unequal starting points → intergenerational inequality perpetuated

Capitalism Reduces Poverty

Profit motive drives innovation → economic growth → rising living standards (absolute poverty falls)

Competition reduces prices → consumers benefit from cheaper goods

Capital accumulation funds investment → productivity growth → higher wages over time

Market-driven growth has lifted billions from absolute poverty (China post-1978)

Exam Tip

AO4 evaluation: "Capitalism is effective at reducing absolute poverty through growth, but it tends to increase relative poverty and inequality because the gains from growth are unequally distributed. The degree of inequality depends on the extent of government redistribution — Nordic capitalism (high tax, high redistribution) produces very different outcomes from Anglo-Saxon capitalism (lower tax, less redistribution)."

Measuring Living Standards

GDP Per Capita (PPP)

GDP divided by population, adjusted for purchasing power parity. The most common measure of average material living standards — but has significant limitations.

6 Limitations of GDP as a Living Standards Measure

Does not capture income distribution — a rising GDP could mask growing inequality

Ignores non-market activity — unpaid care work, volunteering, subsistence farming

Does not capture environmental degradation — GDP rises when oil spills are cleaned up

Does not reflect quality of life — leisure time, stress, health, safety

Shadow/informal economy — uncounted activity (especially large in developing countries)

PPP adjustment imperfect — price baskets differ, quality differences hard to capture

Human Development Index (HDI)

HDI

A composite measure of development combining three dimensions: life expectancy (health), education (mean + expected years of schooling), and GNI per capita (PPP-adjusted living standards). Scored 0–1.

Advantages of HDI

More comprehensive than GDP alone — captures health and education

Encourages governments to invest in human capital, not just growth

PPP-adjusted GNI allows fair international comparison

Simple composite score aids cross-country ranking

Limitations of HDI

Ignores inequality within countries (addressed by IHDI)

Does not capture political freedom, human rights, environmental sustainability

Gender inequality not captured (addressed by GDI)

National averages mask regional disparities

Data quality in developing countries often poor

National Happiness

The spec requires you to understand the relationship between real incomes and subjective happiness.

The Easterlin Paradox

Within a country at a given time, higher income is associated with higher happiness. But over time, as a country's average income rises, average happiness does not keep rising at the same rate. Beyond a certain income level, additional income yields diminishing marginal returns to happiness.

This suggests that above a threshold, relative income (status) and non-material factors (relationships, health, autonomy, purpose) matter more than absolute income for wellbeing.

Exam Tip

The UK's national wellbeing framework (ONS) measures life satisfaction, anxiety, worthwhileness, and happiness alongside GDP. Use this as evidence that GDP alone is insufficient to measure living standards — a strong AO2 application point.

Causes of Changes in Poverty

Reducing Absolute Poverty

Economic growth — rising real GDP → higher incomes → basic needs met

Trade liberalisation — access to global markets → employment and export revenue

Investment in human capital — education and healthcare → productivity → wages

Infrastructure development — connects markets, enables trade

FDI — creates employment, technology transfer

Reducing Relative Poverty

Progressive taxation — higher marginal rates for higher earners

Transfer payments — benefits, Universal Credit, state pensions

Minimum wage legislation — National Living Wage raises floor

Access to public services — free education, NHS → equalising opportunity

Anti-discrimination policy — addresses labour market disadvantage

Inequality Between Countries

Key Causes of International Inequality

Historical factors: Colonial legacies, exploitation of resources, institutional weakness

Geography and climate: Landlocked countries face higher trade costs; tropical diseases reduce productivity

Primary product dependency: Volatile commodity prices → unstable growth (Prebisch-Singer)

Institutional quality: Corruption, weak property rights, political instability → deter investment

Debt burden: Interest payments crowd out spending on infrastructure and human capital

Capital flight: Wealthy individuals move assets abroad → domestic investment falls

Exam Tip

Impact of economic change and development on inequality: Kuznets hypothesis suggests inequality first rises during early industrialisation (rural-urban migration, some benefit from new industries) then falls as education spreads and redistribution policies develop. Evidence is mixed — good AO4 material.

Examiner Alerts

Top Student Errors

Confusing absolute and relative poverty: "Absolute poverty means people have less money than average" — WRONG. That is relative poverty. Absolute poverty is about meeting basic needs against a fixed threshold.

Stating Gini without context: "The UK Gini is 0.35" is descriptive. For marks: "The UK Gini of 0.35 indicates moderate inequality — higher than Nordic countries (~0.27) but lower than the US (~0.41), reflecting the UK's welfare state providing some redistribution while maintaining significant market-driven wage differentials."

Drawing Lorenz without labels: You MUST label: axes (cumulative % pop / cumulative % income), line of equality, Area A, Area B, and state Gini = A/(A+B).

Ignoring wealth inequality: The spec requires the distinction between wealth and income inequality. Many students only discuss income.

Not linking capitalism to inequality: The spec explicitly asks about the significance of capitalism — this must be addressed in relevant essays.

AO4 Evaluation Toolkit

5 Evaluation Points for Poverty & Inequality Essays

Absolute vs relative: "Economic growth reduces absolute poverty but may increase relative poverty if the benefits of growth are unequally distributed. Both must be considered."

Efficiency vs equity trade-off: "Policies to reduce inequality (higher taxes, regulation) may reduce incentives to work and invest, lowering growth. The Laffer curve suggests very high marginal tax rates could actually reduce revenue."

Measurement issues: "GDP per capita hides distribution. Gini captures income but not wealth. HDI improves on GDP but still misses inequality, freedom, and environment."

Capitalism paradox: "Capitalism generates the growth that lifts people from absolute poverty, but also generates the inequality that increases relative poverty. The role of the state in redistribution determines the net outcome."

Context-specific: "Causes and remedies differ between developed and developing countries. In sub-Saharan Africa, the binding constraint is absolute poverty and growth. In the UK, the key issue is relative poverty and redistribution."

Practice Question

Question (4 marks):

Country X has a Gini coefficient of 0.28. Country Y has a Gini coefficient of 0.58.

(a) Draw a Lorenz curve diagram showing both countries. (2 marks)

(b) Explain what the difference in Gini coefficients suggests about the income distribution in these countries. (2 marks)

(a)

Draw axes (cumulative % population on x-axis, cumulative % income on y-axis). Draw line of equality (45° diagonal). Draw Country X's Lorenz curve bowing slightly below the line (close to equality). Draw Country Y's Lorenz curve bowing much further below (far from equality). Label both curves, Area A, Area B. ✓✓

(b)

Country X (Gini 0.28) has relatively equal income distribution — the bottom percentiles of the population receive a share of national income closer to their proportional share. Country Y (Gini 0.58) has highly unequal distribution — a large share of national income is concentrated among a small wealthy elite, while the majority earn proportionally much less. ✓✓

Practice Question

Question (25 marks — Paper 2 style):

"Evaluate the view that economic growth is the most effective way to reduce poverty."

Plan:

Intro: Define absolute and relative poverty. Thesis: growth is necessary but not sufficient — distribution matters.

KAA1:

Growth reduces absolute poverty — rising real GDP → higher incomes → basic needs met. China post-1978: >800m lifted from absolute poverty through sustained growth. Diagram: PPF shifting outward.

KAA2:

Growth alone may not reduce relative poverty — if benefits accrue to top earners, inequality widens. Lorenz curve may bow further even as GDP rises. Redistribution (progressive tax, transfer payments) required.

Eval 1:

"The type of growth matters. Labour-intensive growth (manufacturing) reduces poverty more effectively than capital-intensive growth (mining) because the employment effects are broader. Context is crucial."

Eval 2:

"Alternative policies — direct redistribution, education investment, microfinance — can reduce poverty without waiting for trickle-down. However, without growth generating the resources, redistribution is limited."

Concl:

"On balance, economic growth is necessary but not sufficient. Inclusive growth — where the benefits are broadly shared — combined with targeted redistribution is the most effective approach. Neither growth alone nor redistribution alone is optimal."

Summary

Key Concepts

ConceptKey Point

Absolute PovertyFixed threshold ($2.15/day). Falls with growth.

Relative Poverty60% median income. May rise despite growth.

Lorenz CurveFurther bow = more inequality. Label A, B areas.

Gini CoefficientA÷(A+B). Range 0–1. UK ≈ 0.35.

HDIHealth + Education + GNI per capita (PPP). Score 0–1.

CapitalismReduces absolute poverty (growth) but increases relative inequality (returns to capital).

Must-Know Diagrams

✓ Lorenz curve (with A, B labelled)

✓ PPF showing growth

Must-Know Definitions

✓ Absolute & relative poverty

✓ Gini coefficient (+ formula)

✓ Lorenz curve

✓ HDI (3 components)

✓ Income vs wealth distinction

Exam Tip

This topic overlaps with Theme 2 (GDP, growth, macroeconomic objectives) and Theme 3 (labour market wage inequality). For Paper 3 synoptic essays, link poverty/inequality to micro causes (wage differentials, market failure) AND macro solutions (fiscal policy, growth strategy).