General Trend Model by Kai Neumann

Quantitative Model Personal Financial Situation by Kai Neumann

Just a small quantitative model taken from a very large model. It shows a way to model the financial situation of persons or groups of persons with spendings and income as given parameters and savings (and pensions) and credits as a result.

Mini Model by whom? by naddicott@d*

Quantitative model for the recycling of paper (with stocks) by Kai Neumann

Small exercise to model recycling of paper It can be used for glass or plastics as well. A scenario could be that there is a short term increase of demand or a extraordinarily low price so a paper mill decides to buy more wood which will with a delay lead to more recycled paper and a possible overproduction unless the purchase of wood is lowered again.

Mini Model on Green Investments by Kai Neumann

a very small model showing the major levers as they turned out in larger models on know-why.net

Altes Bessere Welt Modellchen by Kai Neumann

Meeting Model by frahm@k*

Mini model international competitiveness eco technology by Kai Neumann

Just a small model on the competitiveness of eco technology and the effect of regulations that demand more eco friendly technologies.  Feel free to use the model to provide a more differentiated model.

Collaborative World Model for the iBooks Readers by Kai Neumann

This is the collaborative model linked in the latest version of the interactive eBook (available from the Apple iBooks Store). Give it a try and add to it using what you have learned from the exercises from the iBook.

Sustainable Country Medium Model by Kai Neumann

Medium size model without megatrends and a few other details