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Empirical Economics

, Volume 40, Issue 3, pp 581–600 | Cite as

A demand system for input factors when there are technological changes in production

  • Håvard Hungnes
Article

Abstract

In a system with n input factors there are n − 1 independent cost shares. An often-used approach in estimating factor demand systems is to (implicitly or explicitly) assume that there is a (independent) cointegrating relationship for each of the n − 1 independent cost shares. However, due to technological changes, there might not be as many cointegrating relationships as there are (independent) cost shares. This article presents a flexible demand system that allows for both factor neutral technological changes as well as technological changes that affect the relative use of the different factors. The empirical tests indicate that there are fewer cointegrating relationships than usually implied using conventional estimation approaches. This result is consistent with technological changes that affect the relative use of the different input factors. I argue that, since such unexplained technological changes are likely to affect input factor decisions, a demand system that allows for such changes should be preferred.

Keywords

Factor demand Technological changes Growth rates 

JEL Classification

C32 C52 D24 

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  1. 1.Research DepartmentStatistics NorwayOsloNorway

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