Abstract

This paper quantifies and examines the contribution of capital, labour and multifactor productivity (MFP) to GDP growth and analyses the role of measurement of capital and labour inputs for the MFP estimate, using a comprehensive growth accounting exercise for 14 OECD countries. For most OECD countries, the strongest contributions to GDP growth over the past decade have come from growth in total capital input and MFP. This is to some extent related to an increasing role of information and telecommunication technologies in economic growth, particularly over the 1995-2003 period. The importance of measurement issues varies substantially with the type of measurement issue being considered. Substantial differences are observed between employment and hours worked based MFP growth rates. Also, the respective weights with which capital and labour enter the growth accounting equation, and thus, the assumptions concerning the efficiency of production and competition in product markets, significantly influence the resulting MFP estimate. Finally, the results suggest that policy conclusions on the basis of different empirical studies should be made very carefully, in particular as regards the time period for which the respective studies have been undertaken, as well as whether actual or trended time series are being considered. Ce document evalue et examine la contribution du capital, de la main-d'oeuvre et de la productivite globale des facteurs (PGF) a la croissance du PIB, et analyse le role de la mesure des apports de capital et de travail dans l'estimation de la PGF, par un travail complet de quantification comptable de la croissance portant sur 14 pays de l'OCDE. Dans la plupart des cas, c'est la croissance des apports totaux de capital et celle de la PGF qui ont contribue le plus fortement a la croissance du PIB ces dix dernieres annees. Cette evolution est liee dans une certaine mesure au role de plus en plus grand des technologies de l'information et de la communication dans la croissance economique, en particulier pendant la periode 1995-2003. L'importance des questions de mesure varie beaucoup en fonction de leur type. On observe des differences considerables entre les taux de croissance de la PGF fondes sur l'emploi et sur les heures travaillees. En outre, la part relative du capital et du travail dans l'equation comptable de la croissance et, par consequent, les hypotheses concernant l'efficacite de la production et la concurrence sur les marches de produits, influent sensiblement sur l'estimation de la PGF obtenue. Enfin, il semble qu'on ne puisse tirer de conclusions des differentes etudes empiriques qu'en exercant la plus grande prudence, en particulier en verifiant la periode a laquelle ces etudes ont ete effectuees, et en determinant si les series chronologiques considerees sont des series reelles ou des series de tendances.

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