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Human Development Index components dimensions 2024 UNDP calculation
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I now have everything needed for a comprehensive, exam-standard answer on HDI from Park's PSM textbook plus current UNDP data. Here is the full answer:
Human Development Index (HDI)
Source: Park's Textbook of Preventive and Social Medicine
Definition
The Human Development Index (HDI) is a composite index focusing on three basic dimensions of human development:
- To lead a long and healthy life - measured by life expectancy at birth
- The ability to acquire knowledge - measured by mean years of schooling and expected years of schooling
- The ability to achieve a decent standard of living - measured by Gross National Income (GNI) per capita in PPP US$
"HDI provides a more comprehensive picture of human life than income does." - Park's PSM
It was introduced in 1990 in the first Human Development Report by Mahbub ul Haq with the contribution of Amartya Sen, under the United Nations Development Programme (UNDP).
Structure of HDI
The diagram below from Park's illustrates how HDI is constructed:
| Dimension | Indicator(s) | Dimension Index |
|---|---|---|
| Long and healthy life | Life expectancy at birth | Life Expectancy Index |
| Knowledge | Mean years of schooling + Expected years of schooling | Education Index |
| Decent standard of living | GNI per capita (PPP US$) | GNI Index |
Key Concepts
- HDI values range from 0 to 1
- The value shows the distance a country has already travelled towards the maximum possible value of 1
- It allows comparisons across countries
- It is a more comprehensive measure than per capita income alone - income is only a means to human development, not an end
Steps to Calculate HDI
Step 1 - Create Dimension Indices (Goalposts)
Minimum and maximum values (goalposts) are set to transform indicators into indices between 0 and 1:
| Dimension | Observed Maximum | Minimum |
|---|---|---|
| Life expectancy (years) | 83.2 | 20.0 |
| Mean years of schooling (years) | 13.2 | 0 |
| Expected years of schooling (years) | 20.6 (capped) | 0 |
| Combined education index | 0.951 | 0 |
| Per capita income (PPP US$) | 108,211 | 163 |
Formula for each dimension index:
Dimension index = (Actual value - Minimum value) / (Maximum value - Minimum value)
- For the Education index: equation is applied to each subcomponent (Mean years + Expected years), then a geometric mean is created, and the equation is reapplied.
- For the Income index: natural log (ln) of GNI per capita is used, because income has diminishing returns to human development.
Step 2 - Aggregate the Three Indices (Geometric Mean)
HDI = (Life Expectancy Index × Education Index × GNI Index)^(1/3)
The geometric mean is used (since 2010) instead of the old arithmetic mean, because it:
- Reflects that the three dimensions are not perfectly substitutable
- Penalizes unequal achievements across dimensions
Classification of Countries by HDI
| Category | HDI Value |
|---|---|
| Very High Human Development | ≥ 0.800 |
| High Human Development | 0.700 - 0.799 |
| Medium Human Development | 0.550 - 0.699 |
| Low Human Development | < 0.550 |
Related Composite Indices (UNDP)
Beyond the basic HDI, UNDP also publishes:
| Index | What it measures |
|---|---|
| IHDI (Inequality-adjusted HDI) | HDI adjusted for inequality within the country |
| GDI (Gender Development Index) | HDI values separately for females and males; ratio of female to male HDI |
| GII (Gender Inequality Index) | Gender-based disadvantage in reproductive health, empowerment, and labour market |
| MPI (Multidimensional Poverty Index) | Overlapping deprivations in health, education, and standard of living |
Why HDI is Important (PSM Perspective)
- It is a health indicator as well as a socioeconomic indicator - life expectancy is the health dimension
- It helps identify inequities between nations and within nations
- It is used to monitor progress toward SDGs (Sustainable Development Goals)
- HDI is superior to GNP/GDP alone because it captures human well-being and not just economic output
- It guides health policy - countries with low HDI are prioritized for international aid and health interventions
India's HDI (Current Status)
As per the UNDP Human Development Report 2023/24:
- India falls in the Medium Human Development category
- India's HDI continues to improve gradually, with gains primarily in education and income dimensions
Exam High-Points (One-Liners)
- HDI was introduced in 1990 by UNDP (Mahbub ul Haq, Amartya Sen)
- Three dimensions: Health (life expectancy), Education (MYS + EYS), Income (GNI per capita PPP)
- HDI is the geometric mean of the three dimension indices (since 2010)
- Range: 0 to 1 (closer to 1 = higher development)
- Very high HDI: ≥ 0.800
- Minimum life expectancy used: 20 years; Maximum: 83.2 years
- Minimum income used: $163 PPP
- Education uses two indicators: Mean years of schooling (adults ≥25 years) and Expected years of schooling (children of school-entry age)
- Income index uses ln (logarithm) of GNI - reflects diminishing returns
Park's Textbook of Preventive and Social Medicine, Chapter on Health Indicators, pp. 22-23
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