Green, Brown, and Now White Certificates: Are Three One Too Many? A Micro-Model of Market Interaction

In recent years, European environmental policy has focused primarily on the reduction of carbon emissions and on fostering the expansion of renewable energy production. In 2008, the EU established the 20/20/20 vision, demanding that carbon emissions and energy consumption both be reduced by 20%, and that the production of Green Energy be further increased in order to account for 20 percent of total energy production by 2020. Regarding the reduction of emissions, a cap-and-trade system (Brown Certificates) was implemented. for the fostering of so called renewable, i.e. Green, energy different nations chose different measures, such as direct subsidies, feed-in-tariffs (e.g. Germany), or Green Certificate markets based on a quota system (e.g. Denmark). Recently, a market-based instrument (White Certificates) intended to improve efficiency of non-commercial energy consumption is also on the agenda of several European nations (demand side management). All of these instruments are directed towards the energy market. Therefore, this paper deals with identifying interdependencies and trade-offs that might occur, if both, supply and demand side, of a single market are regulated by different policy measures. Our results show that, in fact, significant interdependencies and trade-offs exist. In our model, a feed-in tariff in combination with an emission cap or tax renders the most favorable results??in the absence of demand side management.