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EU KLEMS Project

EU KLEMS Working Paper Series

No. 25

Erumban, Abdul Azeez (2008) Capital Aggregation and Growth Accounting: A Sensitivity Analysis, (June 2008)


With the increasing importance of investment in Information Technology, methods for measuring the contribution of capital to growth have re-assumed centre-stage in recent growth accounting literature. The importance of using capital service growth rates rather than capital stock growth rates has long been advocated, and has become mainstream practice. However, the choice for a particular rate of return in the derivation of capital service prices is not straightforward and has barely been researched. Using four alternative rental price models – based on both external and internal rates of return models–this paper quantifies the differences in multifactor productivity growth rates (MFPG) under different model assumptions. The differences in MFPG are also examined in terms of the inclusion of taxes and subsidies in the calculation of rental prices. Empirical analysis, carried out for four EU countries and the US in 26 industries during 1979-2003 shows that the use of capital stock overestimates MFPG in most industries. Incorporation of taxes seems to have only modest effect. The magnitude of divergence generated by alternative rental price models-particularly between internal models- is quite low. The difference is seen to be relatively high between external rate of return models and internal rate of return models.

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This project is funded by the European Commission, Research Directorate General as part of the 6th Framework Programme, Priority 8, "Policy Support and Anticipating Scientific and Technological Needs".

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Last changed on: July 7 2008