Assessing the effects of measurement errors on the estimation of production functions

Carmine Ornaghi

Journal of Applied Econometrics, 2006, vol. 21, issue 6, 879-891

Abstract: This article explores to what extent the poor results that are often found when estimating parameters of production functions can be attributed to measurement errors, due to the use of common price deflators across firms. Because of the lack of detailed micro‐economic data, econometricians have to rely on industry‐wide deflators when computing outputs and intermediate inputs. A unique feature of the longitudinal data used in this paper is that it reports firm‐level prices. This allows for a comparative assessment of production function parameters where the outputs and intermediate inputs are computed using both firm‐specific prices and industry‐wide deflators. The empirical results presented in this paper show that the use of common deflators across firms leads to lower scale estimates, mainly because of a large downward bias in the estimated coefficients for labour. Copyright © 2006 John Wiley & Sons, Ltd.

Date: 2006
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