Which one of the following statements is not correct?
- A.Real GDP is calculated by valuing outputs of different years at common prices.
- B.Potential GDP is the real GDP that the economy would produce if its resources were fully employed.
- C.Nominal GDP is calculated by valuing outputs of different years at constant prices.
- D.Real GDP per capita is the ratio of real GDP divided by population.
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Explanation
The correct answer is C. Nominal GDP values each year's output at that year's own (current) prices, not at constant prices, so this statement is not correct.
GDP is the money value of all final goods and services produced within a country in a year. Nominal GDP uses current prices, so it can rise simply because prices have gone up. Real GDP removes this effect by valuing the output of every year at the prices of one base year, which shows the true change in production. The ratio of nominal to real GDP, multiplied by 100, gives the GDP deflator, a broad measure of inflation.
A is correct: valuing different years at common, or base-year, prices is exactly how real GDP is worked out.
B is correct: potential GDP is the output the economy could produce with full employment of labour and capital.
D is correct: real GDP divided by population gives real GDP per capita, a common measure of living standards.
Exam tip: nominal GDP = current prices; real GDP = constant (base-year) prices; deflator = nominal ÷ real × 100.