Felix-Model

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FeliX (Functional Enviro-economic Linkages Integrated neXus) is a system dynamics model of global social, economic, and environmental Earth systems.

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# Felix-Model
To get updates about the FeliX model, subscribe to our **[newsletter](https://iiasa.us5.list-manage.com/subscribe/post?u=4a7b399fd5c39ff77e8f1e7dc&id=392b395289&f_id=00cbc2e1f0)**.

To explore FeliX with an interactive interface, see **[FeliXSim](https://climatechoice.github.io/felix/)**.

**If you are using the FeliX model in your work or studies, please** [**get in touch**](mailto:eker@iiasa.ac.at) **to join our collaboration network.**

FeliX (Functional Enviro-economic Linkages Integrated neXus) is a system dynamics model of global social, economic, and environmental Earth systems. More information can be found at:

* https://iiasa.ac.at/models-tools-data/felix

An [online documentation](https://iiasa.github.io/felix_docs/) of the model is available, and detailed documentation reports can be seen [here](/Documentation).

This repository contains different versions of the FeliX model used in various publications. The model is developed on the modelling software [Vensim](https://vensim.com/), therefore the users should have Vensim installed to be able to display and simulate the model. While the previous versions can be displayed and simulated by the free version of Vensim ([Vensim PLE](https://vensim.com/vensim-personal-learning-edition/)), the current version requires features that are available only in the licensed version, which is [Vensim DSS or PRO](https://vensim.com/vensim-software/#professional-amp-dss). The users who have no access to Vensim DSS can still display the model by using the [Vensim Model Reader](https://vensim.com/vensim-model-reader/). Packaged versions of the model to be used by the Model Reader are under [Current Version](/Current_Version).

Below is a list of recent scientific publications that used the FeliX model. Further information can be seen in the method description and supplementary information of these articles. The full list of FeliX publications is [here](/Publications/).

* Eker S, Reiter C, Liu Q, Kuhn M, Lutz W. (2026) [Wellbeing cost of carbon](https://www.cambridge.org/core/journals/global-sustainability/article/wellbeing-cost-of-carbon/D58FE26C07619E3D8E67F21E63DC7D01). *Global Sustainability*. 2026;9:e1.
* Kuhn M, Eker S, Reiter C, \& Liu Q. (2023). “Global systems analysis for understanding the drivers of sustainable wellbeing”. In Lutz W \& Pachauri S (Eds.), [Systems Analysis for Sustainable Wellbeing. 50 years of IIASA research, 40 years after the Brundtland Commission, contributing to the post-2030 Global Agenda](https://pure.iiasa.ac.at/id/eprint/18965/) (pp. 61-76). IIASA.
* Liu Q, Gao L, Guo Z, Moallemi E, Eker S, Yang J, Obersteiner M, Bryan B (2023). [Robust strategies to end global poverty and reduce environmental pressures](https://www.cell.com/one-earth/fulltext/S2590-3322(23)00141-0), One Earth 6(4) 392-408.
* Moallemi EA, Eker S, Gao L, Hadjikakou M, Liu Q, Kwakkel J, Reed P, Obersteiner M, Guo Z, Bryan B. (2022). [Early systems change necessary for catalyzing long-term sustainability in a post-2030 agenda](https://www.cell.com/one-earth/fulltext/S2590-3322(22)00324-4) *One Earth*.
* Eker S, Reese G, Obersteiner M (2019). [Modelling the drivers of a widespread shift to sustainable diets](https://www.nature.com/articles/s41893-019-0331-1). *Nature Sustainability* 2: 725-735.
* Walsh B, Ciais P, Janssens I, Peñuelas J, Riahi K, Rydzak F, van Vuuren D, Obersteiner M. (2017) [Pathways for balancing CO2 emissions and sinks](https://doi.org/10.1038/ncomms14856). *Nature Communications* 8, 14856.

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