Growth and development: concepts and measures

"Measuring growth" is the first line of the ESI syllabus, and for good reason. Almost every ESI answer, on poverty, jobs, inflation or the external sector, leans on the vocabulary of national income and development. If you are unsure whether GVA includes taxes or what the HDI actually averages, every later topic becomes shakier.

Growth and development: the distinction

Growth is usually necessary for development, because it creates the income and tax revenue that pay for schools, hospitals and social protection. It is not sufficient: an economy can grow while inequality widens, jobs lag behind output, or health and learning stay poor.

The philosophical basis for the distinction comes largely from Amartya Sen's capability approach: development is the expansion of the real freedoms people have to lead lives they value. Income is a means to that end, not the end itself.

Measuring output: the national income aggregates

Gross Domestic Product (GDP) is the market value of all final goods and services produced within a country's domestic territory in a period. "Final" avoids double counting; intermediate goods are counted only once, inside the final product.

India's national accounts, compiled by the National Statistics Office (NSO) under MoSPI, report output from the production side as Gross Value Added (GVA) at basic prices, sector by sector, and headline growth as GDP at market prices. The link is:

• GDP at market prices = GVA at basic prices + product taxes − product subsidies.

The other aggregates follow in a chain:

Worked example: an imaginary economy

Suppose an economy has GDP of 1,000 units, net factor income from abroad of −20, depreciation of 110 and net indirect taxes of 90. Its population is 5 units.

1. GNP = 1,000 + (−20) = 980.
2. NNP at market prices = 980 − 110 = 870.
3. National income (NNP at factor cost) = 870 − 90 = 780.
4. Per capita income = 780 ÷ 5 = 156.

For India, net factor income from abroad has usually been negative, because payments of interest, dividends and profits to foreign investors exceed similar receipts. That is why India's GNI is a little below its GDP.

Real versus nominal

Nominal GDP uses current prices; real GDP uses the prices of a base year, so it removes the effect of inflation. The GDP deflator is nominal GDP ÷ real GDP × 100, the broadest price index in the economy.

Suppose nominal GDP grows 10% and the deflator rises 4%. Real growth is 1.10 ÷ 1.04 − 1 = 0.0577, or about 5.8%. The quick approximation (10 − 4 = 6%) is close but slightly overstates it.

Why GDP is not welfare

• Unpaid work in households, mostly done by women, is not counted.
• Environmental damage is not subtracted: felling a forest raises GDP this year and lowers future well-being.
• Distribution is invisible: the same GDP per head can hide very different lives.
• Quality of life, such as security and clean air, is outside the measure.

These gaps are why "beyond GDP" measures such as the HDI, poverty indices and green accounting exist.

Measuring development

The Human Development Index (HDI)

Published by the UNDP in its Human Development Report since 1990, the HDI grew out of the work of Mahbub ul Haq and Amartya Sen.

Since 2010 the three dimension indices have been combined by a geometric mean, so a very poor score in one dimension cannot be fully offset by a high score in another. Related UNDP measures adjust for inequality (IHDI) and compare women and men (the Gender Development Index and Gender Inequality Index).

The Multidimensional Poverty Index (MPI)

The global MPI, developed by the UNDP and the Oxford Poverty and Human Development Initiative in 2010, uses 10 indicators across health, education and living standards. A person is multidimensionally poor if they are deprived in at least a third of the weighted indicators.

India's national MPI, published by NITI Aayog, uses 12 indicators: the global 10 plus maternal health and bank account.

It uses the Alkire–Foster method: MPI = H × A, where H is the share of people who are poor (headcount) and A is the average share of deprivations among the poor (intensity). If H = 0.15 and A = 0.44, MPI = 0.15 × 0.44 = 0.066. So the index falls when fewer people are poor or when the poor are less deprived.

The growth arithmetic: savings, investment and ICOR

The Harrod–Domar idea gives a simple link: growth rate ≈ investment rate ÷ ICOR. The incremental capital–output ratio (ICOR) is the extra capital needed for one extra unit of output; a lower ICOR means capital is used more productively.

• With investment at 32% of GDP and an ICOR of 4.5, growth ≈ 32 ÷ 4.5 ≈ 7.1%.
• To grow at 8% with an ICOR of 4, investment must be about 8 × 4 = 32% of GDP.

The Solow model adds a caveat: capital alone runs into diminishing returns, so sustained growth needs rising productivity from technology, skills and institutions. Good ESI answers on growth mention both.

Inclusive and sustainable growth

• Inclusive growth spreads its benefits widely: jobs, access to services, financial inclusion, regional balance. It was the theme of the Eleventh Five Year Plan ("faster and more inclusive growth"); the Twelfth Plan added "sustainable".
• Sustainable development was defined in the Brundtland Report (1987) as meeting present needs without compromising the ability of future generations to meet theirs. The UN's 17 Sustainable Development Goals (2015) set targets for 2030, and NITI Aayog tracks states on its SDG India Index.

The policy debate

The classic Indian debate is between two emphases, not two opposite camps:

A strong answer concludes that the two reinforce each other: growth funds development, and a healthy, educated workforce sustains growth.

Model answer outline (15 marks)

Question: "Economic growth does not automatically lead to development." Discuss with reference to India.

1. Opening: define growth and development in a sentence each; state that growth is necessary but not sufficient.
2. How growth helps: incomes, revenue for social spending, poverty reduction through jobs.
3. Why it may not translate: jobs lagging output, inequality, weak public services, regional gaps, environmental costs, gender gaps in work and health.
4. Evidence in words: differences between income rankings and HDI rankings across countries and Indian states; progress on multidimensional poverty alongside persistent nutrition and learning gaps.
5. Way forward: job-rich manufacturing and services, investment in health and learning outcomes, women's workforce participation, targeted social protection, green growth.
6. Conclusion: growth creates resources; policy decides whether they improve lives.

Short model answer (10 marks)

Question: What does the Multidimensional Poverty Index measure, and why is it useful alongside income poverty?

The Multidimensional Poverty Index measures poverty as overlapping deprivations rather than low income alone. India's national MPI, published by NITI Aayog, covers three dimensions (health, education and standard of living) through 12 indicators, including nutrition, years of schooling, cooking fuel, sanitation, housing, maternal health and bank accounts. A person counts as poor if deprived in at least a third of the weighted indicators.

It is useful for three reasons. First, it shows what people lack, such as sanitation, fuel or schooling, so policy can target it. Second, it can be computed from household surveys down to district level, which helps local planning. Third, it combines how many people are poor with how intense their poverty is, so progress for the poorest counts.

It complements income poverty lines, which capture consumption and vulnerability to price shocks, rather than replacing them.

Practice questions

1. GNP minus depreciation equals:
   • NNP at market prices.
2. Which indicators represent the knowledge dimension of the HDI?
   • Mean years of schooling and expected years of schooling.
3. Nominal GDP grows 12% and the GDP deflator rises 5%. Real growth is about:
   • 6.7% (1.12 ÷ 1.05 = 1.0667).
4. Which two indicators does India's national MPI add to the global MPI's ten?
   • Maternal health and bank account.
5. With a saving and investment rate of 30% of GDP and an ICOR of 5, the Harrod–Domar growth rate is:
   • 6% (30 ÷ 5).
6. GDP at market prices equals GVA at basic prices plus:
   • Product taxes minus product subsidies.

Common mistakes

• Using GDP and national income interchangeably. National income is NNP at factor cost.
• Calling the HDI an arithmetic average. It has been a geometric mean since 2010.
• Quoting HDI ranks or MPI figures from memory. They change with each report.
• Writing "growth versus development" as if they conflict. Examiners want the link, not a fight.

What to do next

• Write the aggregates chain from GDP to per capita income from memory.
• Type the 15-mark answer above in 27 minutes.
• Move on to the structure of the Indian economy, then poverty and inequality.