This paper re-examines the existence of an Environmental Kuznets Curve (EKC) across countries using a semi-parametric regression estimator, which places no restrictions on the functional form. Our results using cross-country panel data on Sulfur and Carbon Dioxide strongly suggest that the...

The main objective of our paper is to investigate the validity of the theoretically postulated J type relationship between pollution control expenditures/capita and income/capita. We use the Pollution Abatement Costs and Expenditures dataset to examine the validity of this postulated...

This paper uses panel data and the Local Linear Kernel Estimator (LLKE), to investigate the effects of aid on physical capital investment in developing countries. Specifically, we investigate the robustness of the relationship between aid and physical capital investment in Less Developed...

We propose an estimator of the conditional distribution of XtXt-1,Xt-2,..., and the corresponding regression function , where the conditioning set is of infinite order. We establish consistency of our estimator under stationarity and ergodicity conditions plus a mild smoothness condition.

It is a well known fact that time series and data are commonly and frequently used in applied researches and various methods are developed for analysis of these data. The most common method used for analysis of monovariate time series is Box- Jenkins method which is based on modelling of a time...

This paper proposes a semiparametric option pricing model with liquidity, as proxied by the relative bid-ask spread. The nonparametric volatility function with liquidity as an explanatory variable is estimated using the Symmetrized Nearest Neighbors (SNN) estimator rather than the traditional...