This paper extends the results of series of papers, i.e., Zaim (2004) and Yörük and Zaim (2005a, 2005b). We construct an environmental efficiency index for OECD countries and establish an environmental Kuznets curve relationship between environmental efficiency and income. We then investigate...

The role of the environment is an important issue in policy making andthe accurate assessment of the environmental conditions is vital. Inthis paper, using nonparametric techniques, an environmental efficiencyindex is developed for each of the OECD countries. These indexes allowone both to do...