World Induced Technical Change Hybrid (WITCH)
WITCH is an integrated energy-economy-climate assessment model that incorporates a hybrid top-down optimization structure with a detailed bottom-up energy sector input component. The model features the main economic and environmental policies in each world region as the outcome of a dynamic game.
When to Use This Tool
This tool is most useful for development impacts assessments focused on:
Learn more about the topics for assessing the impacts of low-emission development strategies (LEDS).
The model represents the interaction between the energy sector, the economy and climate change impacts in five OECD regions and seven non-OECD regions.
How to Use This Tool
None provided; Requires GAMS; Computable General Equilibrium (CGE)/economic modeling knowledge recommended
Level of Expertise
Gross domestic product, population, current climate policies, and resource use
Examples of how World Induced Technical Change Hybrid (WITCH) has helped people assessing the impacts of low-emission development strategies in countries and regions:
A list of WITCH publications are available here: http://www.witchmodel.org/pag/publications.html