期刊名称：International Business & Economics Research Journal
印刷版ISSN：1535-0754
电子版ISSN：2157-9393
出版年度：2011
卷号：10
期号：12
页码：11-22
语种：English
出版社：The Clute Institute for Academic Research
摘要：The purpose of the study is to develop a data envelopment analysis (DEA) model to estimate the relative scale efficiency of platinum-mining companies environmental performance. South African platinum-mines were used to demonstrate the model, which uses environmental performance indicators as the input variables in order to generate mineral extraction and financial performances as the output variables. The input variables considered were greenhouse gas emissions, water usage and energy usage, while the output variables were platinum production, return on equity and return on assets. The contribution of the study is that a DEA model was developed that could identify relatively efficient companies that could act as benchmarks with regard to environmental issues in the mining sector. A further contribution is that the study concluded that platinum-mining companies tend not to achieve economies of scale, where the companies that are relatively larger in size tend to operate on a scale that is too large and companies that are physically relatively smaller in size tend to operate on a scale that is too small.
关键词：Economies of Scale;Energy Usage;Environmental Performance;GHG Emissions;Platinum-Mining;Scale Efficiency;Water Usage
