Which valuation method for GNP accounts for inflation over time?

The valuation method that accounts for inflation over time is the use of constant dollars. This approach adjusts the nominal value of economic output to reflect the effects of inflation, allowing for a more accurate comparison of economic performance across different time periods. By converting nominal dollar amounts into constant dollars, analysts can eliminate the distortions caused by inflation, providing a clearer view of an economy's growth or contraction.

When figures are reported in constant dollars, they represent purchasing power, enabling stakeholders to understand the true changes in economic output or income over time. This makes constant dollars a preferred method for assessing real economic growth, as it reflects the actual amount of goods and services produced without the impact of inflation.

In contrast, nominal dollars do not adjust for inflation and reflect the value of money at the time of measurement, which can misrepresent economic growth during periods of inflation. Real dollars aim to achieve a similar purpose as constant dollars but might not be as commonly referenced in the context of defining inflation-adjusted figures. Fixed dollars might be used in specific contexts but are not the standard term for inflation-adjusted measurements in economic analysis.