Real GDP

Real GDP removes the effect of price change to support comparisons of aggregate production volume. Its percentage change is usually more interpretable than adding chained-dollar components, because chain-type measures are not generally additive outside their reference conditions.

“Real” does not mean exact, physical, or welfare-adjusted. The estimate still depends on source data, seasonal methods, deflators, quality adjustment, chain weights, and revision cycles. It can grow while per-person output falls or while important harms rise.

Do not compare an annualized quarterly rate with a year-over-year or annual- average rate as though they shared a denominator and horizon. Name both periods and recompute the rate from the appropriate levels when possible.

Use the measure for its stated job

For example, compare two aligned real-GDP levels to calculate output growth, then state whether the published rate is quarterly, annualized, year-over-year, or annual. The BEA GDP guide explains current-dollar and inflation-adjusted GDP and the revision process. Preserve the release vintage and do not add chained-dollar components unless the table supports that use. Real GDP is useful for aggregate production trends. It does not measure household welfare, distribution, unpaid work, or a specific company's sales.