Human Development Index (Hdi): Components, Calculation and Top Countries

The Human Development Index (HDI) serves as a statistical tool used to measure a country’s overall achievement in its social and economic dimensions. Introduced by the United Nations Development Programme (UNDP) in 1990, the index shifts the focus of development economics from national income metrics to human-centered capabilities. It provides a comparative platform to evaluate health, education, and living standards across nations.

Historical Background and Conceptual Origin

Pakistani economist Dr. Mahbub ul Haq created the Human Development Index in 1990 alongside Indian Nobel laureate Amartya Sen. The conceptual foundation rests on the Capability Approach pioneered by Amartya Sen, which defines development as the expansion of human freedoms and choices. UNDP published the first Human Development Report (HDR) in 1990, establishing HDI as an alternative to Gross Domestic Product (GDP) for tracking social progress.

Core Dimensions and Indicators of HDI

The Human Development Index evaluates progress across three basic dimensions using four specific statistical indicators.

Long and Healthy Life (Health Dimension)

• Life Expectancy at Birth: Calculates the average number of years a newborn is expected to live if prevailing mortality patterns at the time of birth remain constant throughout life.
• The minimum goalpost value is set at 20 years, while the maximum goalpost value is capped at 85 years.

Access to Knowledge (Education Dimension)

• Expected Years of Schooling (EYS): Estimates the total number of years of schooling a child of school-entrance age can expect to receive under prevailing enrollment rates. The maximum goalpost value is 18 years.
• Mean Years of Schooling (MYS): Measures the average number of years of education received by adults aged 25 years and older during their lifetime. The maximum goalpost value is 15 years.
• The combined Education Index is calculated as the arithmetic mean of the two individual schooling indices.

Decent Standard of Living (Income Dimension)

• Gross National Income (GNI) per capita (PPP $): Reflects the total domestic and foreign output claimed by residents, divided by the total population, adjusted for Purchasing Power Parity in United States dollars.
• Uses a natural logarithm scale to account for the diminishing marginal utility of income as wealth increases.
• The minimum goalpost value is 100 PPP dollars, and the maximum goalpost value is 75,000 PPP dollars.

Methodology and Calculation Formula

The calculation of the HDI follows a three-step mathematical process to convert raw statistical values into a normalized score between 0 and 1.

Step 1: Normalization of Dimension Indices

Each indicator is transformed into a dimension index between 0 and 1 using fixed minimum and maximum goalposts: text{Dimension Index} = frac{text{Actual Value} – text{Minimum Value}}{text{Maximum Value} – text{Minimum Value}} For the income dimension, logarithmic transformation applies: text{Income Index} = frac{ln(text{Actual GNI per capita}) – ln(100)}{ln(75,000) – ln(100)}

Step 2: Aggregation of Indicators

• Education Index: Calculated as the arithmetic mean of the Expected Years of Schooling Index and the Mean Years of Schooling Index.
• Overall Composite Index: Calculated using the geometric mean of the three dimension indices:

text{HDI} = (text{Health Index} times text{Education Index} times text{Income Index})^{frac{1}{3}} Using the geometric mean prevents high achievement in one dimension from fully compensating for poor performance in another.

Classification Categories of Countries

UNDP divides countries into four human development tiers based on their composite HDI score.

Complementary Indices Published by UNDP

UNDP introduced supplementary metrics over time to address inequality, gender disparity, and multidimensional deprivation.

• Inequality-Adjusted Human Development Index (IHDI): Discounts the average HDI value based on the level of internal inequality within each dimension across the population.
• Gender Development Index (GDI): Measures gender gaps by calculating the ratio of female HDI to male HDI across the three dimensions.
• Gender Inequality Index (GII): Measures loss of achievement due to gender disparities in reproductive health, empowerment, and labor market participation.
• Multidimensional Poverty Index (MPI): Developed jointly with the Oxford Poverty and Human Development Initiative (OPHI), it tracks non-monetary deprivations across health, education, and living standards at the household level.
• Planetary Pressures-Adjusted Human Development Index (PHDI): Adjusts the standard HDI by factoring in per capita carbon dioxide emissions and material footprint.

Global Rankings and India’s Position

• Iceland, Switzerland, Norway, and Denmark occupy top positions among nations in the very high human development group.
• South Sudan, Central African Republic, and Somalia remain near the bottom of global rankings in the low human development category.
• India ranks 130th out of 193 countries in the UNDP Human Development Report, placing it in the medium human development tier with an HDI value of 0.685.
• India’s life expectancy at birth stands at 72.0 years, while Expected Years of Schooling reached 12.95 years and Mean Years of Schooling reached 6.88 years.
• India’s Gross National Income per capita stands at 9,046.76 dollars in 2021 PPP terms.

Important Facts for Quick Revision

• The Human Development Index was created in 1990 by Pakistani economist Dr. Mahbub ul Haq and Indian Nobel laureate Amartya Sen.
• UNDP publishes the Human Development Report annually.
• HDI relies on three dimensions: Health, Education, and Standard of Living.
• Four indicators measure HDI: Life Expectancy at Birth, Expected Years of Schooling, Mean Years of Schooling, and GNI per capita (PPP $).
• The final HDI score is computed using the geometric mean of the three dimension indices.
• Minimum and maximum goalpost values for life expectancy are 20 years and 85 years.
• Goalpost bounds for GNI per capita are 100 PPP dollars and 75,000 PPP dollars.
• Inequality reduces India’s HDI score by approximately 30.7%.
• The Multidimensional Poverty Index (MPI) measures overlapping household deprivations across health, education, and living standards.
• The Planetary Pressures-Adjusted HDI (PHDI) factors in carbon footprint and ecological impacts.