GDP and GNI questions often look harmless, then students lose marks by mixing totals, per-capita values, and growth rates. Keep the formula visible and the interpretation separate.
Core formulas
- GDP per capita = GDP / population
- GNI = GDP + net income from abroad
- Growth rate = (new value - old value) / old value × 100
Exam tip
After calculating the number, add one sentence on what it implies. For example, a rise in GDP does not automatically mean a rise in living standards if population also increased sharply.
That is why GDP and inequality often pair well with the Lorenz curve guide.
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