Tsurumi, Tetsuya; Managi, Shunsuke - In: International Journal of Global Environmental Issues 9 (2009) 1/2, pp. 69-83
The Environmental Kuznets Curve (EKC) hypothesises an inverse U-shaped relationship between a measure of environmental pollution and per capita income levels. In this study, we apply non-parametric estimation of local polynomial regression (local quadratic fitting) to allow more flexibility in...