Koop, Gary and Tole, Lise (2012) Estimating the impact on efficiency of the adoption of a voluntary standard: an empirical study of the global copper mining industry. Journal of Productivity Analysis. ISSN 0895-562X (In Press)
This article uses data on the world's copper mining industry to measure the impact on efficiency of the adoption of the ISO 14001 environmental standard. Anecdotal and case study literature suggests that fiÂ…rms are motivated to adopt this standard so as to achieve greater efficiency through changes in operating procedures and processes. Using plant level panel data from 1992-2007 on most of the world's industrial copper mines, the study uses stochastic frontier methods to investigate the effects of ISO adoption. The variety of models used in this study. Finds that adoption either tends to improve efficiency or has no impact on efficiency, but no evidence is found that ISO adoption decreases efficiency.
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