Development is measured through several indicators because it includes changes in income, health, education, poverty, and inequality. The Human Development Index (HDI), Multidimensional Poverty Index (MPI), and Gini index measure different aspects, so they should be used together rather than interchangeably.
How the indicators work
| Indicator | What it measures | Interpretation and example |
|---|---|---|
| HDI | Average achievement in life expectancy, education, and gross national income per capita | The United Nations Development Programme calculates a geometric mean between and . In its 2023/24 report, Switzerland recorded an HDI of , indicating very high human development. |
| MPI | Overlapping household deprivations across health, education, and living standards | A person is multidimensionally poor when deprived in at least one-third, or , of the weighted indicators. The 2023 global MPI found that about billion people across countries experienced multidimensional poverty. |
| Gini index | The distribution of income or consumption within a population | A value of represents perfect equality, while , or sometimes , represents perfect inequality. South Africa's World Bank estimate of approximately for 2014 indicates extremely high inequality. |
HDI gives a broad national average, but averages can conceal unequal outcomes between regions, genders, or ethnic groups. MPI identifies the intensity and composition of poverty, helping governments target particular deprivations such as inadequate sanitation or school attendance.
The Gini index reveals inequality but does not show whether people have adequate health, education, or income. The common misconception is that a high HDI automatically means low inequality: a state may achieve high average development while distributing its benefits unevenly.
These indicators connect development to power and interdependence because governments and international organizations decide what data counts, how resources are distributed, and which development priorities receive attention.
Exam technique
In an IB Global Politics response, define each indicator, explain what it reveals, and evaluate its limitation using a dated case. Avoid treating any single numerical measure as a complete judgment of development.
