Market imperfections and economic efficiency of white certificate systems

This paper takes the view that energy markets and markets for energy efficiency have significant imperfections, including ones that cannot be repaired through prices alone. The acknowledgement of the various market imperfections, however, does not endorse automatically the use of various instruments, such as tradable white certificates (TWC). Therefore, it is necessary to clarify under what conditions a TWC system can have equal or superior effectiveness and economic efficiency as compared to other instruments. The article explains the principles of a TWC system in terms of market functioning and price formation. It also highlights some key assumptions regarding additionality of energy savings, transaction cost, free riding, target setting and regulatory predictability. Subsequently, the paper illustrates how a TWC system interacts with other energy efficiency policy instruments, in particular standards and taxes. After these explanatory sections the article turns to the modelling of actual TWC price formation in selected countries and subsequently presents a comparative assessment of a TWC system with an energy tax for Finland and the Netherlands.