📊 The Human Development Index (HDI)
The Human Development Index (HDI).
| Dimension | Indicator | Why included |
|---|---|---|
| Health | Life expectancy at birth | A long life is a fundamental development outcome |
| Education | Mean years of schooling + Expected years of schooling | Knowledge is essential for human capability |
| Income | GNI per capita (PPP) | A reasonable standard of living enables access to goods and services |
HDI ranges from 0 to 1. Countries are classified as: Very High (≥ 0.800), High (0.700–0.799), Medium (0.550–0.699), Low (< 0.550).
HDI in action: Norway (HDI ≈ 0.961) vs Niger (HDI ≈ 0.394). The gap reflects differences in life expectancy (83 vs 62 years), schooling (12.6 vs 2.1 mean years), and income ($65k vs $1.2k GNI PPP).
⚖️ Evaluating the HDI
- ✅ Broader than GDP — captures health and education, not just income.
- ✅ Simple and comparable — one number makes ranking and comparison straightforward.
- ✅ Shifts the debate — focuses policy attention on human capabilities, not just economic output.
- ✅ Widely available — published annually by the UNDP for 190+ countries.
- ❌ Still uses averages — hides inequality within a country.
- ❌ Only 3 dimensions — ignores environmental sustainability, political freedom, security, gender equality.
- ❌ Data reliability — depends on quality of national statistics, which varies.
- ❌ Weightings are arbitrary — the three dimensions are weighted equally — but is health really as important as education?
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📐 Beyond the HDI
- Inequality-adjusted HDI (IHDI) — shows that many high-HDI countries drop significantly when inequality is factored in.
- Gender Inequality Index (GII) — highlights discrimination that the HDI alone cannot capture.
- Multidimensional Poverty Index (MPI) — goes beyond income poverty to capture what people actually experience.
For top marks: mention the IHDI or GII to show you understand that the HDI has been improved upon, not just criticised. This demonstrates analytical depth.