The model treated in this paper is the latest "societal model" of IIASA's Energy Systems Program. After a brief resume of historical developments, the structure of the model is described. Its structural properties are investigated, and the dynamics inside and outside the slack-free region are determined. Then two parameter sets -- one for a typical developed country and one for a typical less developed country -- are chosen, and scenario variables are introduced. Using this approach, the authors study the interaction between a developed country and a less developed one under the influence of different oil price levels
