On this page we publish intermittendly papers, data and information about projects we do.
World3-03
Here you find the world model supporting the book “Limits to Growth The 30-Year Update” published by Donella Meadows, Jorgen Randers, and Dennis Meadows in 2004. The model is named World3-03 and is a slight modification and improvement of the World3-91 model that supported the book “Beyond the Limits” by the same authors in 1992. Both books were published by Chelsea Green Publishing House, White River Junction, Vermont.
The memo that describes the changes made from World3-91 to World3-03, and the parameter changes needed to generate the 11 scenarios discussed in the book can be downloaded by clicking here. It is a Word DOC file.
Then there are the model files, one for each scenario. This is a ZIP file and can be downlaoded by clicking here. The models are in Stella of the version current in 2004.
Finally, the output files can be downloaded by clicking here. This is a ZIP file with PICT files, which is an old Macintosh file format. According to Fileinfo.com they can be opened by XnViewMP or Adobe Photoshop.
Tax the Rich
In March 2024 Jorgen Randers and Till Kellerhof published the book “Tax the Rich – Warum die Reichen zahlen müssen, wenn wir die Welt retten wollen”, in German with Oekom Verlag in München.
The following technical background papers are available for download:
1. Questions often asked about the message of TTR.
2. Questions often asked about the assumptions underlying TTR.
These papers will be updated periodically.
ISDC2023
Here you can download the paper “FORECASTING GLOBAL ENERGY USE TOWARDS 2060” presented at the International System Dynamics Conference 2023 in Chicago, by clicking on the title.