COMPARABILITY OF EFFORT BY ANNEX 1 PARTIES

The paper examines the challenges of defining 'comparable effort' for Annex I Parties, arguing that a simple set of transparent indicators is more conducive to political agreement than complex fairness models. It analyzes proposed 2020 targets against emissions, population, and GDP data, introducing 'trajectory indicators' to assess the consistency of short-term targets with 2050 goals. The authors highlight that Annex I countries fall into three distinct economic groups—'New World' economies, 'Old OECD' economies, and 'Transition economies'—which must be recognized for any target-setting to be feasible. Finally, the document reviews cost-based indicators, concluding that current model results are too inconsistent and outdated, particularly following the global financial crisis, to provide a reliable basis for cost-comparability without further harmonization.

• Annex I Parties can be categorized into three distinct groups based on population and GDP trends since 1990: 'New World' Economies (higher growth), 'Old OECD economies' (stable population, lower GDP growth), and 'Transition economies' (stable/declining population with high GDP growth following 1990 declines).
• The authors introduce 'trajectory indicators' to visually depict the consistency between proposed 2020 targets and long-term 2050 goals, which can also help inform domestic debates regarding intergenerational cost transfers.
• There is significant ambiguity regarding how to compare national pledges on an 'apples with apples' basis, specifically concerning the treatment of land use, land use change and forestry (LULUCF).
• When normalizing proposed 2020 emissions by projected GDP changes, the targets of most Annex I Parties appear more similar, though Ukraine remains an outlier.
• The global financial crisis has had a stark impact on economic development pathways, rendering many current model reference scenarios outdated and inconsistent.
• Cost-based indicators are currently unreliable for negotiators because different models produce widely varying results based on their specific assumptions and parameters.
• The authors argue that indicators should be used as a toolkit to represent political concerns and justify outcomes, rather than as a strict mathematical formula to determine a 'fair' distribution of effort.

APA

Ward, M., & Grubb, M. (2009). COMPARABILITY OF EFFORT BY ANNEX 1 PARTIES. Climate Strategies. https://climatestrategies.org/wp-content/uploads/2014/11/cs-comparability-of-effort-by-annex-i-parties-overview-of-issues-draft.pdf

Chicago

Ward, Murray, and Michael Grubb. COMPARABILITY OF EFFORT BY ANNEX 1 PARTIES. Climate Strategies, 2009. https://climatestrategies.org/wp-content/uploads/2014/11/cs-comparability-of-effort-by-annex-i-parties-overview-of-issues-draft.pdf.

Wikipedia

{{cite report |last1=Ward |first1=Murray |last2=Grubb |first2=Michael |title=COMPARABILITY OF EFFORT BY ANNEX 1 PARTIES |publisher=Climate Strategies |date=November 2009 |url=https://climatestrategies.org/wp-content/uploads/2014/11/cs-comparability-of-effort-by-annex-i-parties-overview-of-issues-draft.pdf |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{ward2009comparability, author = {Ward, Murray and Grubb, Michael}, title = {{COMPARABILITY OF EFFORT BY ANNEX 1 PARTIES}}, institution = {Climate Strategies}, year = {2009}, month = nov, url = {https://climatestrategies.org/wp-content/uploads/2014/11/cs-comparability-of-effort-by-annex-i-parties-overview-of-issues-draft.pdf}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }