What is the scale of global inequality and how can development be measured?
Contrasting ways of defining and measuring development (GDP per capita, HDI, measures of inequality, corruption indices) and how demographic data differ between developing, emerging and developed countries.
A focused answer to Edexcel GCSE Geography B Topic 2 (Development dynamics) on defining and measuring development, covering economic and social measures (GDP per capita, HDI, inequality and corruption indices) and how demographic data such as fertility, death rates and population structure differ between developing, emerging and developed countries.
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What this dot point is asking
This is Edexcel GCSE Geography B (1GB0) Paper 1, Section B (Topic 2, Development dynamics). Edexcel expects you to know contrasting ways of defining development (narrow economic criteria versus broader social and political measures) and measuring it: GDP per capita, the Human Development Index (HDI), measures of inequality and indices of political corruption. You must also explain how demographic data (fertility rates, death rates, population structure, maternal and infant mortality) differ between developing, emerging and developed countries. Population pyramids and quintile data are common resources, so calculation and interpretation are tested.
Defining and measuring development
Development is the progress a country makes in improving the wealth, wellbeing and quality of life of its people. It can be defined narrowly by economic criteria (how rich a country is) or broadly by social measures (health, education) and political measures (freedom, governance).
Single economic measures can be misleading. GDP per capita is an average, so it hides how income is shared: a country with a small, very wealthy elite can look developed while most people remain poor. That is why composite and inequality measures matter, and why two countries with the same GDP per capita can have very different real living conditions.
Demographic differences
A country's stage of development shows clearly in its population data.
A population pyramid shows these differences visually: a wide base means many young children (high birth rate, less development); straight sides and a tall pyramid mean low birth and death rates (more development). Falling infant mortality is one of the clearest signs of development, because it reflects better healthcare, clean water and nutrition.
Working with development data
Paper 1 sets development questions in a resource context, so you must read and calculate from data. Income quintiles divide the population into five equal fifths by income; comparing the share of national income held by the richest fifth and the poorest fifth measures inequality. A large gap between the quintiles shows high inequality even in a country with a high average GDP.
Try this
Q1. State two measures, other than GDP per capita, used to compare development. [2 marks]
- Cue. Any two of HDI, life expectancy, infant mortality, literacy or years of schooling, a measure of inequality, or a corruption index.
Q2. Explain why infant mortality is a useful indicator of development. [3 marks]
- Cue. It reflects the quality of healthcare, clean water and nutrition, so a low infant mortality rate indicates a more developed country, and it falls as a country develops.
Exam-style practice questions
Practice questions written in the style of Pearson Edexcel exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
Edexcel B 20194 marksExplain one advantage of using the Human Development Index rather than GDP per capita to measure development. (Paper 1, Section B)Show worked answer →
A 4-mark "Explain" question on Paper 1 (Development dynamics), assessing AO1 and AO2. Markers reward a developed point about why a composite measure is better, not just a definition.
Award credit for: GDP per capita measures only average wealth and hides how income is shared, so a country with a few very rich people can look developed while most people are poor. The Human Development Index (HDI) combines income with life expectancy and education (years of schooling), so it captures social wellbeing and quality of life, not just money. This gives a fuller, more reliable picture of how developed a country really is and where to target help. The strongest answers contrast the single economic measure with the composite social measure and explain why that matters.
Edexcel B 20224 marksUsing Figure 1, calculate the difference in birth rate between the two countries shown on the population pyramids and describe what this suggests about their development. (Paper 1, Section B)Show worked answer →
A 4-mark data-response question assessing AO4 (skills) and AO2. It combines a calculation with interpretation, so you must show the working and then explain.
Award credit for: a correct calculation from the pyramid data (for example a wide base showing a birth rate of 38 per 1000 in the developing country minus a narrow base of 11 per 1000 in the developed country gives a difference of per 1000). Then interpret: the wide base and high birth rate suggest a less developed country with limited family planning, high infant mortality and a young population, while the narrow base suggests a developed country with low birth and death rates and an ageing population. Markers reward accurate reading and calculation from the resource plus a linked interpretation about development.
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Sources & how we know this
- Pearson Edexcel GCSE (9-1) Geography B (1GB0) specification — Pearson Edexcel (2016)