Economic Development

1. Why this topic matters

This is the largest single topic in chapter 10 by examination weight, and it rests on one distinction that must be stated precisely:

• Economic growth is an increase in real output, measured by real GDP or real GDP per head. It is quantitative.
• Economic development is a broader improvement in welfare and living standards, including health, education, freedom of choice and reduction in poverty. It is qualitative as well as quantitative.

Growth is usually necessary for development, because rising output funds health and education. It is not sufficient. Output can rise while most people see no improvement, if the gains accrue to a narrow group, or are exported, or are offset by environmental damage.

The examinable skill is knowing which indicator answers which question, and being able to say what each one misses.

2. GDP and its limitations as a welfare measure

2.1 The standard adjustments

• Real rather than nominal, to remove the effect of price changes.
• Per head, to remove the effect of population change. A country growing at 3 per cent with population growth of 3 per cent has no rise in output per person.
• At purchasing power parity (PPP) when comparing across countries, because market exchange rates do not reflect the relative cost of living. Non-traded goods and services are typically far cheaper in low income countries, so market rates understate their real living standards.

Worked example. Real GDP grows 4.5 per cent while population grows 2.1 per cent. Real GDP per head grows by approximately 4.5 minus 2.1, which is 2.4 per cent.

2.2 What GDP omits

• Distribution. GDP per head is a mean. Rising average income tells you nothing about the median, and a large rise concentrated at the top is consistent with no change for most people. This is why the Gini of 8.2 must accompany it.
• The informal economy, which is a large share of activity in many developing countries. Subsistence agriculture, unpaid domestic work and informal trade are excluded or badly estimated, so official GDP understates real output.
• Externalities and depletion. Production that pollutes or exhausts natural capital adds to GDP; the damage is not deducted. Cleaning up the pollution adds to GDP again.
• Non-marketed welfare: leisure, health, life expectancy, personal security, political freedom.
• Composition of output. Spending on armaments and on hospitals count identically.

2.3 Why it is still used

It is available, comparable, frequently updated and correlates strongly with most other welfare measures. The correct examination position is that GDP is a necessary but insufficient indicator, not that it is useless.

3. The Human Development Index

3.1 Composition

The HDI combines three dimensions, each converted to an index between 0 and 1 and then averaged:

• A long and healthy life, measured by life expectancy at birth.
• Knowledge, measured by mean years of schooling and expected years of schooling.
• A decent standard of living, measured by gross national income per head at PPP, using a logarithm so that additional income counts for less at higher levels.

3.2 How to read it

An HDI close to 1 indicates high human development. Countries are grouped into low, medium, high and very high bands.

The logarithm of income matters and is examinable: it embodies the diminishing marginal utility of income, so an extra $1,000 raises the index far more for a poor country than for a rich one.

3.3 Strengths

• Captures health and education directly, so it measures outcomes rather than only the means to achieve them.
• Reveals divergence between income and welfare. A country can have relatively high income and low HDI, which signals that income is not being converted into health and education, and that is a useful policy signal.
• Widely published and comparable over time.

3.4 Limitations

• Ignores distribution, exactly like GDP per head. Two countries with the same HDI may differ greatly in inequality. The inequality-adjusted HDI addresses this but is less widely quoted.
• Ignores political freedom, security, gender equality and environmental quality.
• The weighting is arbitrary: there is no objective reason the three dimensions should count equally.
• Data quality is weak in exactly the countries where measurement matters most.
• Averages within a country conceal large regional differences.

4. Other indicators

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4.1 The Multidimensional Poverty Index

The MPI measures the proportion of people experiencing overlapping deprivations across health, education and living standards, using indicators such as nutrition, child mortality, years of schooling, school attendance, cooking fuel, sanitation, drinking water, electricity, housing and assets.

Its advantage over an income poverty line is that it identifies who is deprived in what way, which is directly useful for targeting policy. A household above an income line may still lack sanitation and electricity.

CIE has asked candidates to compare the relative merits of gross national income and the MPI, so be ready to say: GNI measures the resources available; the MPI measures whether people actually experience adequate conditions. GNI is a mean and hides distribution; the MPI is a headcount of deprivation and hides the depth of income poverty.

4.2 Gross national income and gross national product

GDP measures output produced within a country's borders. GNI measures income accruing to a country's residents, wherever earned, so it adds net income from abroad.

The distinction matters greatly for development. A country hosting substantial foreign-owned production has GDP well above GNI, because profits flow out as investment income. Its output figures flatter the income actually available to its residents. Similarly a country receiving large remittances has GNI above GDP.

Naming this is a reliable way to earn analysis marks on questions about foreign direct investment.

4.3 Single indicators

Often used alongside composite measures because they are concrete and comparable:

• life expectancy at birth and infant mortality;
• adult literacy and school enrolment;
• access to clean water, sanitation and electricity;
• doctors or hospital beds per thousand people;
• calorie intake per head; and
• the proportion of the labour force in agriculture, which falls as an economy develops.

5. Sustainability

Sustainable development meets the needs of the present without compromising the ability of future generations to meet their own needs.

An economy growing by depleting non-renewable resources or degrading soil, water and air may raise measured GDP now while reducing the capacity to produce later. Measured growth of that kind is partly an illusion, because it consumes capital while recording it as income.

Indicators used to capture this include the rate of resource depletion, carbon emissions per head, and adjusted net saving, which deducts resource depletion and environmental damage from conventional saving.

This connects directly to the growth against sustainability conflict of 10.1 and to the policy discussion in 10.5.

6. Comparing countries: what to watch for

When a question supplies data on two countries:

• Check whether income figures are at PPP or market exchange rates.
• Check per head rather than total, and note the population growth rate.
• Look for divergence between GDP per head and HDI, which indicates how well income is converted into welfare.
• Look for GDP against GNI, which reveals income flowing abroad.
• Ask about distribution, since a mean can conceal deep poverty.
• Note the informal sector, since official figures understate output where it is large.

An answer that interrogates the data this way will outperform one that simply reports which figure is higher.

7. Integrated analysis and common traps

7.1 A complete chain

Country A has GDP per head at PPP of $9,000 and an HDI of 0.62. Country B has GDP per head at PPP of $6,500 and an HDI of 0.71.

Country A is richer on average but Country B achieves better health and education outcomes. This suggests B converts income into welfare more effectively, perhaps through stronger public provision of healthcare and schooling, or that A's income is highly concentrated so that the average overstates the typical experience.

Further checks: if A's GNI is well below its GDP, a substantial part of that output accrues to foreign owners and is not available to residents, which would explain the discrepancy without any difference in policy. If A's Gini is much higher than B's, the distributional explanation is stronger.

Judgement: on the evidence given, B has achieved more development at a lower level of output, but a conclusion requires the distributional and GNI data before it can be firm. Saying what additional data you would need is a legitimate and well-rewarded move.

7.2 Common examination errors

• Treating growth and development as synonyms.
• Comparing GDP per head across countries without PPP adjustment.
• Forgetting to adjust for population growth.
• Saying the HDI accounts for inequality, which the standard HDI does not.
• Forgetting that HDI income is logged, and why.
• Confusing GDP with GNI, particularly in questions about foreign investment.
• Listing indicators without saying what each one misses.
• Ignoring the informal economy when discussing low income countries.

8. Paper 3 and Paper 4 mastery

Paper 3 tests: which indicator is least suitable for a stated comparison, calculating growth in output per head from output and population growth, identifying the three HDI components, and distinguishing GDP from GNI.

Paper 4 asks candidates to assess whether a country has developed, or to compare indicators. The strong structure explains the growth and development distinction, evaluates each indicator supplied, notes what the data cannot show, and reaches a judgement that names the missing evidence.

Learn the three HDI components exactly. Questions ask for them by name, and approximations lose marks.

9. Final checklist

A fully prepared learner can:

• distinguish economic growth from economic development precisely;
• explain why growth is necessary but not sufficient for development;
• state the three adjustments to GDP and calculate growth per head;
• explain why PPP is needed for cross-country comparison;
• list at least five limitations of GDP as a welfare measure;
• name the three HDI dimensions and their indicators;
• explain why HDI income is logged and what that embodies;
• state at least four limitations of the HDI, including distribution and weighting;
• explain the MPI and compare its merits with GNI;
• distinguish GDP from GNI and explain why the gap matters for development;
• define sustainable development and explain why depletion flatters measured growth; and
• interrogate supplied country data using PPP, per head, distribution and the GDP to GNI gap.