Higher GNI per capita is strongly linked to higher GDP per unit.
Comparing GNI (current LCU), per capita with GDP (constant LCU), per unit of GDP across 205 countries, 2011–2025.
- Rank correlation
- +0.80
- Holding size constant
- +0.80
- Countries compared
- 205
- Period
- 2011–2025
What might link these
Both indicators reflect economic performance, but GNI (income) and GDP (output) can diverge due to factors like net foreign income or structural economic differences. A careful reader should note that correlation does not imply causation, and reverse causality is possible.
Why this is not proof of anything
This is a correlation across countries, not an experiment. It cannot show that either indicator causes the other, and both may simply follow a third thing. The high rank correlation might partly reflect shared measurement scales or underlying economic fundamentals rather than a direct relationship.
The second figure above repeats the measurement with national population and income held constant. It is the more conservative number: a relationship that largely disappears there was mostly telling you that larger, richer countries have more of most things.
How this was measured
Both indicators were ranked across every country reporting each, and the two rankings compared — ranks rather than raw values, because a handful of very large countries can otherwise manufacture a relationship on their own. The calculation is arithmetic over figures already published on this site; the commentary above is drafted from the two indicator names and the resulting coefficients.