Estimating Farm Efficiency in the Presence of Double Heteroscedasticity Using Panel Data

The accuracy of technical efficiency measures is important given the interest in such measures in policy discussions. In recent years the use of stochastic frontiers has become popular for estimating technical inefficiency, but estimated inefficiencies are sensitive to specification errors. One source of such errors is heteroscedasticity. This paper addresses this issue by extending the Hadri (1999) correction for heteroscedasticity to stochastic production frontiers and to panel data. It is argued that heteroscedasticity within an estimation can have a significant effect on results, and that correcting for heteroscedasticity yields more accurate measures of technical inefficiency. Using panel data on cereal farms, it is found that the usual technical efficiency measures used in stochastic production frontiers are significantly sensitive to the extended correction for heteroscedasticity.

Issue Date:
Publication Type:
Journal Article
DOI and Other Identifiers:
Print ISSN 1514-0326 (Other)
Online ISSN 1667-6726 (Other)
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Published in:
Journal of Applied Economics, Volume 06, Number 2
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Total Pages:
JEL Codes:
C23; C24; D24; Q12

 Record created 2017-04-01, last modified 2017-04-27

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