Poverty, Income & Inequality | Global Health Explorers

01 • START HERE

Poverty, Income and Inequality Are Not the Same Thing

These concepts are connected, but they answer different questions. Good global-health analysis starts by knowing which question a measure is designed to answer.

P

Poverty

Poverty describes a lack of resources or capabilities needed to achieve an acceptable standard of living. It can be measured using monetary or multidimensional approaches.

$

Income

Income is the flow of resources received over a period of time. It can come from employment, transfers, pensions, investments and other sources.

↕

Inequality

Inequality describes how resources, opportunities, outcomes or other measurable characteristics differ across people or groups.

◎

Opportunity

Opportunities include access to education, decent work, health care, safe housing, social protection and the ability to participate in society.

Think like a data scientist: Before comparing two places, ask: What exactly is being measured?

02 • MEASURE

How Do We Measure Poverty?

Different measures reveal different dimensions of people's lives. A single poverty number cannot capture every form of deprivation.

01

Monetary poverty

Measures whether people's resources fall below a specified poverty threshold.

What can people afford?

02

Multidimensional poverty

Looks at multiple simultaneous deprivations in areas such as health, education and living standards.

What are people deprived of?

03

Income distribution

Examines how income or consumption is distributed across the population.

How are resources distributed?

04

Health inequality

Examines measurable differences in health between population groups.

Who experiences different outcomes?

WORLD BANK • GLOBAL SNAPSHOT

Poverty Reduction Has Slowed

The World Bank's 2024 assessment highlights a major challenge: global poverty reduction has slowed sharply, while inequality and vulnerability continue to affect shared prosperity.

~700 million people were living in extreme poverty in the World Bank's 2024 assessment.

44% of the global population was estimated to live below the $6.85/day upper-middle-income poverty standard.

1 in 5 people were identified as being at risk of an extreme weather event over their lifetime.

World Bank poverty figures use specific international poverty lines and purchasing-power-parity concepts. They should not be interpreted as equivalent to a country's national poverty line.

UNDP • MULTIDIMENSIONAL POVERTY

Poverty Can Mean Many Deprivations at Once

The Global Multidimensional Poverty Index complements income-based measures by examining overlapping disadvantages in health, education and living standards.

MULTIDIMENSIONAL POVERTY

HEALTH Nutrition
Child mortality

EDUCATION Schooling
Attendance

LIVING STANDARDS Water
Sanitation
Housing
Electricity
Cooking fuel
Assets

1.1 billion people across 109 countries were identified as living in acute multidimensional poverty in the 2025 MPI.

51% of people living in multidimensional poverty were children under 18 in the 2025 MPI.

10 indicators are used across health, education and living-standard dimensions.

GHE insight

A person can have income above a poverty threshold and still experience serious deprivation in another dimension. Conversely, income alone does not tell us how resources are distributed within a household.

03 • THINK SYSTEMS

Poverty and Health Can Reinforce Each Other

Poverty is not simply an outcome. It can also shape exposure to risks and access to protective resources, while poor health can reduce the ability to work, learn and maintain financial security.

1 Limited resources Income, assets or social protection

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2 Living conditions Housing, food, water, environment

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3 Health risks Exposure, stress, illness

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4 Reduced opportunity Work, learning and participation

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Important: This is not a simple one-way chain. The relationships are influenced by policies, institutions, social protection, education, health systems, labour markets and community resources.

04 • SOCIAL DETERMINANTS OF HEALTH

Income Is an SDH — But It Does Not Act Alone

Economic stability influences access to many other conditions that shape health. Income, employment, housing, food security, education and social protection can interact throughout the life course.

Economic position income • employment • wealth

→

Living conditions housing • food • education • environment

→

Opportunities services • participation • mobility

→

Health exposure • prevention • outcomes

01

Income & employment

Stable employment and adequate income can provide access to food, housing, transportation, education and health-protective resources.

02

Housing

Economic insecurity can affect the quality, safety, stability and location of housing.

03

Food security

Limited resources can reduce reliable access to sufficient, safe and nutritious food.

04

Education

Education can influence employment opportunities, income, health literacy and participation.

05

Health-care access

Financial resources, transportation and social circumstances can affect the ability to obtain timely and appropriate care.

06

Social protection

Social protection can help households manage economic shocks and reduce vulnerability.

LOCAL

Look around your community

Are safe housing, transportation, nutritious food, education and health services equally accessible?

NATIONAL

Examine systems

How do employment, taxation, wages, social protection, education and health policies shape opportunity?

GLOBAL

Compare opportunity

How do countries differ in resources, institutions, development and exposure to global shocks?

05 • INEQUALITY

An Average Can Hide a Huge Difference

Country averages can be useful, but they may hide differences between population groups, regions, socioeconomic levels or generations.

Same national average Different distributions

Group A

35

Group B

50

Group C

65

Data lesson: The example is illustrative. When a national average is reported, always ask whether the result changes substantially when the data are disaggregated.

ECONOMIC

Income & wealth

Who has access to resources and assets?

GEOGRAPHIC

Place

How do urban, rural and regional conditions differ?

SOCIAL

Education & status

How do social position and educational opportunity shape outcomes?

DEMOGRAPHIC

Age & sex

Do outcomes differ across stages of life or between population groups?

WHO • HEALTH INEQUALITY MONITOR

Don't Just Ask “How Healthy Is a Country?”

Ask: Who is healthy? Who is being left behind?

The WHO Health Inequality Data Repository brings together disaggregated data that allow health indicators and determinants to be examined across dimensions such as economic status, education, age, sex, place of residence and subnational region.

Explore WHO Health Inequality Monitor

GHE DATA LENS DISAGGREGATE

Economic status

Education

Residence

What changes when we look inside the average?

2,400+ health indicators are represented in the updated WHO Health Inequality Data Repository, across multiple dimensions of inequality.

CONNECT THE WORLD

Poverty and Climate Risk Can Overlap

The 2025 UNDP Multidimensional Poverty Index adds another important dimension: environmental hazards. Poverty can increase vulnerability to shocks, while climate hazards can damage livelihoods and deepen deprivation.

887 million multidimensionally poor people were living in regions exposed to at least one of four climate hazards in the 2025 MPI analysis.

309 million poor people were living in regions exposed to three or four of those hazards.

740 million multidimensionally poor people lived in middle-income countries in the 2025 MPI.

GHE Systems Question

If a community has low income, poor housing and limited access to services, what might happen when a climate shock, food-price increase or infectious-disease outbreak occurs?

Look for overlapping vulnerabilities rather than studying each problem in isolation.

1

SUSTAINABLE DEVELOPMENT GOALS

SDG 1 — No Poverty

End poverty in all its forms everywhere.

1.1

End extreme poverty

Eradicate extreme poverty for all people everywhere.

1.2

Reduce poverty in all dimensions

Reduce poverty according to national definitions and multidimensional measures.

1.3

Social protection

Implement nationally appropriate social protection systems and measures.

1.4

Access to resources

Ensure equal rights to economic resources and access to basic services.

10

CLOSELY CONNECTED

SDG 10 — Reduced Inequalities

SDG 10 focuses on reducing inequality within and among countries, including income inequality, social and economic inclusion and equal opportunity.

SDG 2 • Zero Hunger SDG 3 • Good Health SDG 4 • Quality Education SDG 5 • Gender Equality SDG 6 • Clean Water SDG 8 • Decent Work SDG 11 • Sustainable Cities SDG 13 • Climate Action

GHE DATA DETECTIVE

Six Questions Before You Compare Two Places

01

Same definition?

Are both places using the same poverty or inequality definition?

02

Same year?

Are the observations from comparable periods?

03

Same denominator?

Are rates, percentages or counts based on comparable populations?

04

Average or subgroup?

Could national averages hide differences between groups?

05

Income or deprivation?

Is the indicator measuring resources, outcomes, access or multiple deprivations?

06

Association or cause?

Does the evidence demonstrate a causal relationship, or only a statistical association?

06 • CHECK YOUR THINKING

Poverty, Income & Inequality — 12 MCQs

These questions test concepts, interpretation, comparison and global-health data literacy.

Q1

Which statement best distinguishes poverty from inequality?

A. Poverty measures only health, while inequality measures only income. B. Poverty concerns deprivation or insufficient resources, while inequality describes differences across people or groups. C. They are exactly the same concept. D. Inequality exists only in low-income countries.

Q2

Why is multidimensional poverty useful?

A. It replaces all income data. B. It examines multiple simultaneous deprivations rather than income alone. C. It measures only national GDP. D. It measures only unemployment.

Q3

Which set of dimensions is included in the Global Multidimensional Poverty Index?

A. Health, education and standard of living B. GDP, exports and tourism only C. Climate, military spending and trade only D. Population size alone

Q4

If Country A has a higher average income than Country B, what can we conclude?

A. Everyone in Country A is healthier. B. Country A has no poverty. C. Country A has a higher average income, but this alone does not tell us how income is distributed or how health outcomes differ. D. Country B must have greater inequality.

Q5

According to the 2025 UNDP MPI, approximately how many people across the 109 countries covered lived in acute multidimensional poverty?

A. 110 million B. 550 million C. 1.1 billion D. 3.5 billion

Q6

Which is the best example of a Social Determinant of Health related to economic stability?

A. Income and employment B. Blood type C. Eye colour D. Height

Q7

WHO recommends examining health inequality using disaggregated data. Why?

A. To make national averages unnecessary. B. To reveal differences between population groups that an average may hide. C. To eliminate all uncertainty from health data. D. To compare countries without checking definitions.

Q8

Suppose two countries have the same national average vaccination coverage. What would be most useful for investigating inequality?

A. Stop the analysis because the averages are equal. B. Examine coverage by economic status, residence, education or other relevant dimensions. C. Compare only the countries' land areas. D. Use population size instead of health data.

Q9

Which SDG specifically focuses on ending poverty in all its forms?

A. SDG 1 B. SDG 3 C. SDG 10 D. SDG 13

Q10

Which SDG is specifically focused on reducing inequality within and among countries?

A. SDG 2 B. SDG 8 C. SDG 10 D. SDG 15

Q11

A researcher finds that low-income households have lower average access to preventive health services. What should the researcher conclude first?

A. Income automatically causes every difference. B. There is an observed association that requires further investigation of mechanisms and possible confounding factors. C. Income is irrelevant to health. D. The finding proves that health-care systems are identical everywhere.

Q12

Which question best reflects the GHE approach to poverty and inequality?

A. Which country is simply “rich” or “poor”? B. Which population should be blamed for poverty? C. Who experiences which deprivation, how does it differ across groups and places, what explains the difference, and what could improve opportunity? D. Can one statistic explain every aspect of poverty?

GHE REFLECTION

Every difference matters. Explore it.

A country's average income can tell you something important — but never everything. Ask who has access to resources, who faces barriers, who experiences multiple disadvantages and whether opportunities are changing over time.

What? Who? Where? Why? Compared with whom? What could change?

EXPLORE FURTHER

Trusted Global Sources

Use primary data sources and always check the definition, year, population and methodology behind a statistic.

World Bank Poverty, Prosperity & Planet UNDP Global Multidimensional Poverty Index United Nations SDG 1 — No Poverty United Nations SDG 10 — Reduced Inequalities WHO Health Inequality Monitor WHO HIDR Health Inequality Data Repository NIH Health & social determinants research NIH / NIEHS Environmental & social determinants