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A Consistent Approach to Cost Efficiency Measurement

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  • George C. Bitros
  • Efthymios G. Tsionas

Abstract

Consistent specifications of the allocative inefficiency function in 'cost plus input share equations' systems may be difficult, if not impossible, to find because most plausible ones violate certain reasonable "a priori" conditions. Moreover, the models to which they lead give rise to highly non-linear likelihood functions that are very hard to estimate. In an effort to confront these difficulties, this paper adapts an idea first suggested by Greene (1993) that allocative inefficiency ought to be related to input prices and allocative distortions in the input share equations. The system of 'cost plus input demand equations' that emerges is estimated by standard seemingly unrelated regression (SUR) techniques using data from private and state firms that operated in Greek manufacturing during the 1979-88 period. Among other findings, the estimates show that overall inefficiency for private and state firms was 63.5% and 102.2%, respectively in comparison with the least inefficient firms in their class. In relative terms these figures imply that state firms were almost 61% less efficient than private firms were. Technical and allocative reasons amounting to 64% and 36%, respectively, accounted for this excess inefficiency of state firms, in addition to differences in the utilization of labour, capital and debt. Lastly, it is found that the magnitudes of technical and allocative inefficiencies depend critically upon a self-consistent specification of the allocative inefficiency function. Copyright 2004 Blackwell Publishing Ltd.

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Bibliographic Info

Article provided by Department of Economics, University of Oxford in its journal Oxford Bulletin of Economics & Statistics.

Volume (Year): 66 (2004)
Issue (Month): 1 (02)
Pages: 49-69

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Handle: RePEc:bla:obuest:v:66:y:2004:i:1:p:49-69

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Cited by:
  1. Johannes Sauer & Klaus Frohberg & Henrich Hockmann, 2006. "Stochastic efficiency measurement: The curse of theoretical consistency," Journal of Applied Economics, Universidad del CEMA, vol. 0, pages 139-166, May.

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