The association between energy taxation, participation in an emissions trading system, and the intensity of carbon dioxide emissions in the European Union

Energy taxes are intended to internalize the costs of greenhouse gas (GHG) emissions and to incentivize reductions in GHG emissions; evaluating whether taxes have the desired effect on emissions is an important research question. A second tool to incentivize GHG reductions is an emissions trading system (ETS). We examine data across countries in the EU from 1996 to 2009 and find that as implicit tax rates on energy increased, carbon intensity of emissions decreased. Further, participation in an ETS also resulted in a significant reduction in overall carbon intensity.