Capital stock approximation using firm level panel data

Steffen Mueller

No 38, Working Papers from Bavarian Graduate Program in Economics (BGPE)

Abstract: Many recent studies exploring conditional factor demand or factor substitution issues use firm level panel data. A considerable number of establishment panels contains no direct information on the capital input, necessary for production or cost function estimation. Incorrect measurement of capital leads to biased esti- mates and casts doubt on any inference on output elasticities or input substitution properties. The perpetual inventory approach, commonly used for long panels, is a method that attenuates these problems. In this paper a modified perpetual in- ventory approach is proposed. This method provides more reliable measures for capital input when short firm panels are used and no direct information on capital input is available. The empirical results based on a replication study of Addison et al. (2006) support the conclusion that modified perpetual inventory is superior to previous attempts in particular when fixed effects estimation techniques are used. The method thus makes a considerable number of recently established firm pan- els accessible to more sophisticated production function or factor demand analyses.

Keywords: production function; capital input (search for similar items in EconPapers)
JEL-codes: C81 D24 J23 (search for similar items in EconPapers)
Pages: 19 pages
Date: 2008-01
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (49)

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