A model framework, SIMBIOSES, is presented which describes economic activities and relatedmaterial, substance and energy flows in a multi-region and multi-sector economic system. Theconceptual design of the framework is discussed in relation to current issues on "dematerialization"and...

The nature of energy and material resources in an endogenous growththeory framework is clarified. This involves three modifications of the conventional theory. Firstly, multiple feedback mechanisms or "growth engines" are identified. Secondly, a productionfunction distinguishesbetween resource...

An overview is offered of different approaches to economic modelling of sustainable development. First, conceptual-theoretical perspectives on sustainable development are shortly reviewed from the angle of model implications. Next, different model types are discussed. These include neoclassical...