... conditional on pollution Keywords: Air pollution, carbon dioxide emissions, Environmental Kuznets Curve, convergence, distributional dynamics, mixed nonparametric and semiparametric regressions, ... macroeconomic level It includes three applied essays which make use of recent econometric tools, mainly developed in the nonparametric field, to examine the relationship between economic growth and ... and pollution convergence Investigating pollution growth with macroeconomic reduced form functions allow to analyze the relevance of these models, and to explore pollution growth and convergence...