The Quarterly National Accounts Manual (the Manual) provides conceptual and practical guidance for compilingquarterly national accounts (QNA) statistics. The Manual offers a comprehensive review of data sources, statisticalmethods, and compilation techniques to derive official estimates of quarterly GDP. The new edition—which upgradesthe first edition, published in 2001—improves and expands the previous content based on recent methodological advances,best country practices, and suggestions received from QNA compilers and experts.