(2) Do existing estimates of the no-regret potential stand up to are-evaluation within this framework? As a result of this analysis the size of previous estimates for no-regret potentials may be modified - in terms ofenergy savings or in financial terms. On the basis of these findings, we will approach the overriding third research question: (3) How large is the no-regret potential and what determines its size? The following chapter will provide a fuller account of the debate on no-regret potentials. This will be complemented by a detailed theory-based definition of no regret potentials in...