01 If the GDP deflator is 90, what is the most appropriate interpretation?
Answer and explanation
Correct answer: A. The current average price level is 10% below the base-year level.
Explanation: The GDP deflator is calculated as (Nominal GDP ÷ Real GDP) × 100, with the base-year price index normally equal to 100. A deflator of 90 means that the current-year average price level is 90% of the base-year level, or 10% lower. It says nothing directly about output growth or a 90% inflation rate. Hence option A is correct.