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The report investigates the potential for a Market Stability Reserve (MSR) to address market and regulatory failures in the EU ETS, such as limited banking capacity and regulatory myopia. Through a model comparison exercise involving twelve institutions, the authors assess different MSR designs—including the European Commission's proposal, an 'Early Start' version, and price-based mechanisms—across indicators of efficiency, price credibility, consistency, transformation, and robustness. The findings suggest that an MSR generally improves performance, with an Early Start MSR (2017) offering superior benefits over the 2021 proposal. The report emphasizes that the effectiveness of quantity-based MSRs depends heavily on setting trigger levels that accommodate the hedging needs of market participants, suggesting the use of REMIT Directive data for future adjustments.

The document examines the 'source problem' (energy supply) and 'sink problem' (pollution) within endogenous growth frameworks. It argues that while resource scarcity can drag down growth, it also creates incentives for directed technological change and efficiency gains that can sustain long-run development. The authors compare stylized analytical models with complex CGE-models, noting that the latter are better for sector-specific policy analysis but often act as 'black-boxes'.

The report argues that while precise surgical assessment of comparability is currently impossible, a common set of core indicators is necessary to define fairness and support domestic and international negotiations. It proposes an 'apples with apples' anchoring point based on economy-wide emissions excluding LULUCF and introduces 'trajectory indicators' to align 2020 targets with 2050 goals. The analysis categorizes Annex I Parties into 'New World' economies, 'Old OECD economies', and 'Transition economies' based on emissions, population, and GDP trends. Finally, it emphasizes the need for harmonized economic modelling to provide a rational basis for cost-comparability, especially following the global financial crisis.