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2. Hdi

Learning Objectives​

  • Define the Human Development Index and explain why the UNDP created it in 1990
  • Describe each of the three HDI components — health, education, income — and their specific indicators
  • Calculate the HDI using the geometric mean method and interpret scores on the 0–1 scale
  • Compare India's HDI score and rank with peer developing nations and OECD benchmarks
  • Critically evaluate the limitations of HDI and explain what complementary measures address those gaps
  • Analyse how improvements in life expectancy, schooling, and GNI per capita interact to drive India's HDI progress

Quick Answer​

The Human Development Index is a number between 0 and 1 that the UNDP introduced in 1990 to shift global attention from pure GDP growth to human well-being. It combines three dimensions: how long people live (life expectancy at birth), how much they learn (mean and expected years of schooling), and how comfortably they live (GNI per capita at purchasing power parity). India scored 0.644 in the 2023 HDI report, placing it around 134th out of 193 countries — in the "medium human development" band. The index is widely used in UPSC, state PSC, and bank exams as the benchmark for comparing development across countries.

What is HDI?​

The Human Development Index (HDI) is a summary measure of human development that was introduced by the United Nations Development Programme (UNDP) in 1990. It assesses the quality of life and human development across countries by considering three key dimensions:

  1. Health
  2. Education
  3. Income

Components of HDI​

1. Health​

  • Health is measured by life expectancy at birth, which reflects the average number of years a newborn is expected to live under current mortality rates.
  • It provides an indication of the overall health and longevity of a population.

2. Education​

  • Education is assessed using two indicators:
    • Mean Years of Schooling: The average number of years of education received by individuals aged 25 and older.
    • Expected Years of Schooling: The total number of years of schooling a child entering the education system is expected to receive, assuming current enrollment ratios.
  • These indicators reflect access to education and educational attainment.

3. Income​

  • Income is measured by Gross National Income (GNI) per capita adjusted for purchasing power parity (PPP).
  • GNI per capita represents the average income earned by a country's citizens, adjusted for differences in price levels between countries.

HDI Calculation​

The HDI is calculated using the following steps:

  1. Normalization: Each of the three indicators (life expectancy, mean years of schooling, and GNI per capita) is normalized on a scale from 0 to 1. The minimum and maximum values for each indicator are used to calculate the normalized scores.

  2. Dimension Indexes: The normalized scores for each indicator are aggregated to create dimension indexes:

    • Health Index = (Life Expectancy − Minimum Life Expectancy) / (Maximum Life Expectancy − Minimum Life Expectancy)
    • Education Index = (Mean Years of Schooling Index + Expected Years of Schooling Index) / 2
    • Income Index = (Log(GNI per capita) − Log(Minimum GNI per capita)) / (Log(Maximum GNI per capita) − Log(Minimum GNI per capita))

  3. HDI Calculation: The HDI is the geometric mean of the three dimension indexes:

    • HDI = (Health Index × Education Index × Income Index)^(1/3)

Interpretation of HDI​

1. HDI Scores​

  • HDI Scores range from 0 to 1, where a higher score indicates a higher level of human development.
  • Countries are categorized into four groups based on their HDI scores:
    • Very High Human Development: HDI ≥ 0.800
    • High Human Development: 0.700 ≤ HDI < 0.800
    • Medium Human Development: 0.550 ≤ HDI < 0.700
    • Low Human Development: HDI < 0.550

2. Country Comparisons​

  • HDI allows for comparisons of human development between countries and regions.
  • It provides insights into the relative well-being and quality of life of populations.
  • India (0.644) sits in the "medium" band; China (0.788) is approaching "high"; Norway (0.966) consistently tops "very high."

3. Limitations​

  • HDI Limitations include:
    • Exclusion of Inequality: HDI does not account for income inequality or disparities in education and health within a country. The Inequality-Adjusted HDI (IHDI) corrects for this.
    • Lack of Environmental Considerations: HDI does not include environmental sustainability or ecological impacts.
    • Focus on Averages: HDI relies on average values, which may not capture variations within populations — India's state-level HDI ranges from ~0.77 (Kerala) to ~0.57 (Bihar).
  • Annual Reports: The UNDP publishes the Human Development Report annually, which includes HDI rankings, trends, and analyses of global human development progress.
  • Regional Insights: Reports highlight regional disparities, challenges, and achievements in human development across different parts of the world.
  • India's Trend: India's HDI rose from 0.427 in 1990 to 0.644 in 2022, with life expectancy improving from 58 years to 67.7 years over the same period.

Key Terms​

TermDefinitionRelated Concept
HDIUNDP composite index combining health, education, and income on a 0–1 scaleGNI per capita, Life Expectancy
Life Expectancy at BirthAverage number of years a newborn is expected to live under prevailing mortality ratesHealth Index, IMR
Mean Years of SchoolingAverage years of education received by people aged 25 and aboveEducation Index, Literacy Rate
Expected Years of SchoolingYears of schooling a child is projected to receive, given current enrolment ratesMean Years of Schooling, Gross Enrolment Ratio
GNI per capita (PPP)Average national income per person, adjusted for price-level differences across countriesGDP, PPP, Income Index
Purchasing Power Parity (PPP)Exchange rate that equalises the price of a basket of goods across countries; allows fair income comparisonGNI, Real Income
Geometric MeanHDI aggregation method: cube root of (Health × Education × Income) indices; penalises low scores in any dimensionArithmetic Mean, Dimension Index
IHDIInequality-Adjusted HDI; discounts HDI for within-country inequality in each dimensionGini Coefficient, Atkinson Index
Very High Human DevelopmentHDI ≥ 0.800; typically OECD and Gulf statesNorway, Switzerland, Germany
Medium Human Development0.550 ≤ HDI < 0.700; India's current bandIndia, Bangladesh, Myanmar
GDIGender Development Index; ratio of female to male HDI; measures gender gaps in human developmentHDI, Gender Equality
Human Development ReportAnnual UNDP publication ranking all countries by HDI and thematic development issuesUNDP, SDGs

Common Mistakes​

Misconception: A country with a high GDP per capita will automatically have a high HDI. Why it's wrong: Gulf countries like Saudi Arabia and Qatar have very high GNI per capita but have historically scored lower on HDI than Scandinavian countries because their education and health dimensions lag behind their income dimension. The geometric mean formula penalises imbalance — a country that is excellent on income but weak on schooling gets a lower HDI than a more balanced country. Correct understanding: HDI rewards balanced improvement across all three dimensions. Strong income performance cannot compensate for weak health or education indicators.

Misconception: India's HDI rank reflects the same thing as India's GDP rank. Why it's wrong: India ranks around 5th in the world by total GDP but around 134th by HDI. The difference arises because HDI is per-person and adjusts for health and education — dimensions where India's average performance lags significantly behind high-income economies. Correct understanding: GDP rank reflects total economic size; HDI rank reflects average quality of life. For a large-population country, total GDP can be high even when per-person well-being is modest.

Misconception: The HDI captures all dimensions of human development, including inequality and environmental sustainability. Why it's wrong: The standard HDI is calculated on averages and ignores within-country inequality and environmental costs. The UNDP has produced supplementary indices — the Inequality-Adjusted HDI (IHDI), the Gender Development Index (GDI), and the Planetary pressures-adjusted HDI (PHDI) — to fill these gaps. Correct understanding: HDI is a useful summary but must be read alongside IHDI, GDI, and other measures for a complete picture of development.

Comparison and Connections​

FeatureHDIGDP per capitaIHDI
What it measuresHealth + Education + Income (average)Output per personHDI discounted for internal inequality
India's value (approx.)0.644 (2022)~$2,500 (nominal); ~$9,000 (PPP)~0.476 (2022) — significant inequality discount
Top-ranked countryNorwayLuxembourg / SingaporeSimilar to HDI leaders
Penalises inequality?NoNoYes — by design
Includes environment?NoNoNo (PHDI does)
Used in exams?Heavily testedStandard baselineIncreasingly asked

Practice Questions​

Recall

  1. List the three dimensions of the HDI and the specific indicator used for each. (Guidance: Health = life expectancy at birth; Education = mean years + expected years of schooling; Income = GNI per capita PPP.)
  2. What are the four HDI categories and their score ranges? (Guidance: Very High ≥ 0.800, High 0.700–0.799, Medium 0.550–0.699, Low < 0.550.)

Understanding 3. Why does the UNDP use the geometric mean rather than the arithmetic mean to calculate the final HDI? (Guidance: Geometric mean penalises extreme imbalances — a low score in one dimension drags down the overall index more than it would in a simple average, incentivising balanced progress.) 4. Explain why India's IHDI is significantly lower than its HDI. (Guidance: IHDI applies an inequality discount to each dimension. India has high within-country inequality in income, education attainment, and health outcomes, so the discount is large.)

Application 5. Suppose India raises its mean years of schooling from 6.5 to 8 years over the next decade while life expectancy and GNI remain unchanged. Roughly how does this affect India's HDI trajectory? (Guidance: Improvement in the education index will raise HDI, but the geometric mean means the gain is moderated by unchanged health and income indices — balanced gains are more powerful.) 6. Kerala and Bihar both belong to India, yet their estimated HDI values differ by ~0.20 points. Use the HDI components to explain this gap. (Guidance: Kerala has higher life expectancy, literacy/schooling years, and relatively higher per-capita income in PPP terms from remittances; Bihar lags on all three.)

Analysis 7. Compare the development philosophies implied by using GDP per capita versus HDI as a national target. Which is more appropriate for India's policymakers, and why? (Guidance: GDP per capita incentivises income growth; HDI incentivises balanced investment in health and education. For India, where inequality is high, HDI is a more appropriate compass.) 8. The UNDP has introduced the Planetary pressures-adjusted HDI (PHDI) to account for carbon emissions and material footprint. If India adopted PHDI as its primary development metric, what policy trade-offs would arise? (Guidance: Industrial growth that raises GNI but increases emissions would be penalised; renewable energy investment, clean cooking, and sustainable agriculture would be rewarded.)

FAQ​

Why was HDI created in 1990 if GDP had existed for decades? GDP was created as a wartime production measure, never intended to gauge well-being. By the 1980s economists like Amartya Sen and Mahbub ul Haq observed that countries like Sri Lanka and China had life expectancies and literacy rates far above their GDP rankings. They argued that development should be judged by what people can be and do — Sen's "capabilities approach" — not just by aggregate output. HDI was their practical answer: a simple, comparable, three-dimension index that would shift policy discourse away from GDP worship toward human flourishing.

How often is India's HDI ranking updated, and where can I find the latest figures? The UNDP releases the Human Development Report typically once a year; the 2023/2024 report uses 2022 data. India's rank and score change each year as data is revised and other countries' scores change. For exam preparation, remember the approximate band (medium human development, score ~0.64, rank ~134) and the trend direction (steadily improving since 1990) rather than a precise rank that shifts annually.

What is the difference between GNI per capita and GDP per capita, and why does HDI use GNI? GDP measures output produced within a country's borders by anyone — including foreign companies. GNI adds income earned by residents abroad and subtracts income sent out by foreigners. For India, millions of citizens work in Gulf countries and send remittances home; GNI captures those transfers. Since HDI aims to measure the resources available to a country's people, GNI per capita is a better fit than GDP per capita.

Does a rising HDI guarantee that poverty is falling? Not necessarily. HDI is an average: it can rise even if gains are concentrated among the already well-off. India's HDI improved significantly between 1990 and 2022, and so did the official poverty headcount ratio (which fell sharply). But inequality also widened, meaning the richest benefited more in absolute terms than the poorest. Always pair HDI data with the IHDI and the poverty headcount ratio to get the full picture.

Which Indian states have the highest and lowest HDI scores? Based on estimates derived from NITI Aayog and state-level UNDP data, Kerala consistently ranks highest (~0.77), reflecting its long history of public investment in education and healthcare. Other high performers include Himachal Pradesh and Goa. Bihar, Jharkhand, and Uttar Pradesh rank lowest (~0.57–0.60), primarily because of lower mean years of schooling, higher infant mortality, and lower per-capita income. This intra-country variation is why IHDI — which captures inequality — is so important for India.

Quick Revision​

  • HDI introduced by UNDP in 1990, inspired by Mahbub ul Haq and Amartya Sen's capabilities approach
  • Three dimensions: Health (life expectancy), Education (mean + expected schooling years), Income (GNI per capita PPP)
  • Calculated as geometric mean of three normalised dimension indices — scored 0 to 1
  • Four bands: Very High (≥ 0.800), High (0.700–0.799), Medium (0.550–0.699), Low (< 0.550)
  • India's HDI: ~0.644 (2022), ranked ~134th — medium human development
  • India's HDI rose from 0.427 (1990) to 0.644 (2022) — significant but still below the global average
  • Geometric mean penalises imbalance: being weak in one dimension cannot be offset by being strong in another
  • Key limitation: HDI uses averages and ignores within-country inequality → use IHDI for inequality-adjusted measure
  • Other supplementary indices: GDI (gender), MPI (multidimensional poverty), PHDI (planetary pressures)
  • Kerala (≈0.77) vs. Bihar (≈0.57) — intra-India variation is as large as inter-country gaps
  • HDI ≠ GDP rank: India is ~5th by total GDP but ~134th by HDI because of population size and welfare gaps
  • Exam tip: Know the formula components, the four bands, India's approximate score, and HDI's three main limitations

Prerequisites: Development Concepts (GDP, GNI, PPP), Basic Macroeconomics, Introduction to Indian Economy

Related Topics: Poverty and Inequality (Gini, IHDI, MPI), Education and Health Development, Gender Equality

Next Topics: Economic Theories — understanding the theoretical frameworks that explain why countries differ in development outcomes