| Summary: | 碩士 === 銘傳大學 === 經濟與金融學系碩士班 === 107 === This study explores the relationship between the efficiency of water use in 24 countries and the potential for Carbon dioxide reductions, and investigates how to improve efficiency and reduce carbon dioxide emissions. This paper uses Data Envelopment Analysis (DEA) and Malmquist Productivity Index (MPI) to analyze energy efficiency. The empirical results of this study show that some undeveloped countries or developing countries have achieved water efficiency, and carbon dioxide emissions have reached efficiency but some countries are not from DEA empirical results. The empirical results of the MPI show that these 24 countries in 2006 to 2012, technical efficiency changes (TEC), Technological Changes(TC), Scale Efficiency Changes (SEC), and Total Factor Productivity Change (TFP) were all declining on average, and only Pure Technical Efficiency Changes (PTEC) were maintained, include Japan, Estonia, France, Mexico, the Netherlands, Rome, and the United Kingdom. The countries with more serious declines are Bangladesh, Costa Rica and China.
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