Technical documentation of I3E model, Version 3. ESRI Survey and Statistical Report Series 91 May 2020.

This paper provides a technical description of the Ireland Environment, Energy and Economy (I3E) model. The I3E model is an intertemporal computable general equilibrium model with multiple firms, one representative household group, multiple commodities, government, enterprises, and rest of the world accounts. It describes the Irish economy in sectoral detail. This model includes a detailed description of energy inputs and concomitant greenhouse gas emissions and has been developed with the purpose of investigating the economic and environmental impacts of climate policies for Ireland. After each major development of the model, an updated version of this report is published. The current report belongs to the third version of the model.