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Recent years have seen many attempts to combine expenditure-side estimates ofU.S. real output (GDE) growth with income-side estimates (GDI) to improveestimates of real GDP growth. We show how to incorporate information frommultiple releases of noisy data to provide more precise estimates whileavoiding some of the identifying assumptions required in earlier work. Thisrelies on a new insight: using multiple data releases allows us to distinguishnews and noise measurement errors in situations where a single vintage doesnot.  Our new measure, GDP++, fits the data better than GDP+, the GDP growthmeasure of Aruoba et al. (2016) published by the Federal Reserve Bank ofPhiladephia. Historical decompositions show that GDE releases are moreinformative than GDI, while the use of multiple data releases is particularlyimportant in the quarters leading up to the Great Recession.

Can GDP measurement be further improved? Data revision and reconciliation