"As a measure of economic activity, gross domestic product (GDP) is a useful indicator of output and suitable for using in estimates of productivity. However, as a measure of welfare, it has several limitations. This article follows Sefton and Weale (1996, 2005) in producing an estimate of real income ? a corrected or adjusted version of GDP ? that is linked to current and future consumption possibilities. This measure of real income differs from real (money) GDP by taking account of capital consumption, net income and transfers from overseas, and uses a consumption deflator rather than a general GDP deflator so that output is valued in terms of consumption units."

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