Double Deflation and the Measurement of Output and Productivity in UK Manufacturing 1979–89

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Abstract
The objective of this paper is to examine the impact of applying double deflation methods to the measurement of productivity growth in UK manufacturing between 1979 and 1989. A number of alternative indicators of output growth are considered and it is argued that double deflated value added is the superior concept to employ for the measurement of productivity. It is shown that output measured by double deflated value added fell by 0.05% over the period between 1979 and 1989 whereas the official series indicates that output rose by 12.2% over the period. Measuring productivity as output per person employed, the double deflated value added measure indicates that between 1979 and 1989productivity increased by 34%> whereas the official series indicates an increase of 51 %. Whereas the latter may indicate a productivity miracle the former does not

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