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IAMC

Model

MERGE-ETL

MERGE-ETL is an integrated assessment model combining a bottom-up description of the energy system, a top-down description of the economy (Ramsey-type), and a simplified climate cycle. In addition, technological learning is represented in MERGE-ETL by two-factor learning curves for technology investment costs by accounting for technological and regional spillovers in

MERGE-ETL is an integrated assessment model combining a bottom-up description of the energy system, a top-down description of the economy (Ramsey-type), and a simplified climate cycle. In addition, technological learning is represented in MERGE-ETL by two-factor learning curves for technology investment costs by accounting for technological and regional spillovers in technology learning.

More models

Celebrating the Release of GCAM-China-v8 to Support China’s National Climate Assessment

On April 12, 2026, the Center for Global Sustainability at the University of Maryland, Peking University and Tsinghua University celebrated the release of GCAM-China-v8. This update introduces a series of new features, including harmonization with the latest global GCAM v8.2 framework, updating the base year to 2021, introducing a provincial-level

IFs Model: Updates and Resources SSPs

We are pleased to share several recent developments and resources that may be of interest to the community: Preprint on New SSP OperationalizationA preprint article has been released introducing a new operationalization of the Shared Socioeconomic Pathways (SSPs) for 188 countries through 2150. This work covers a wide range of