What is the term for the total dollar value of a country's final goods and services in a year, measured at constant prices?

The total dollar value of a country's final goods and services in a year, measured at constant prices, is known as Real GDP. This measure accounts for inflation and allows for a more accurate comparison of economic output over different years by adjusting for price changes. By using constant prices, Real GDP reflects the actual volume of production without the effects of price fluctuations, making it a critical metric for understanding an economy's genuine growth or contraction over time.

In contrast, Nominal GDP measures the same total value but at current market prices, which can be distorted by inflation. Gross National Product measures the total economic output produced by the residents of a country, including their investments abroad, but does not adjust for price changes. Net National Product further adjusts Gross National Product by accounting for depreciation. Thus, Real GDP stands out as the best measure for assessing an economy's performance over time when price changes are taken into account.