In this paper the implications of ecologically sustainable economic development for modeling are considered. First we discuss the concept of ecologically sustainable economic development and suggest that any description of it should consider four central concepts: intergenerational trade-off, interregional aspects, multiple use of resources, and risk and uncertainty. We discuss each of these at a conceptual level and consider the implications for model building and model use at both theoretical and operational levels. It is concluded that, although different approaches are possible, to a large extent similar requirements for models are to be fulfilled.
The range of analytical techniques in the field of Regional Science has grown enormously in the last decade; however, integration - of techniques and modelling frameworks - has not been a prominent feature until relatively recently. In this paper, a brief review of some early developments in integrated modelling will precede discussion of some of the current initiatives. An re-examination of a call for large scale modelling made by Boyce (1989) will be considered in the context of work in regional and interregional social accounting and computable general equilibrium models, especially in the developing world. The review will be illustrated by reference to research undertaken in Bangladesh, Korea and Indonesia and the resulting policy analyses conducted with these models.
The effects of change in transport cost are investigated for homogeneous Cournot duopoly with several regional or international markets and with decreasing marginal costs. A new existence proof is given for the unique Cournot duopoly equilibrium based on an integration of mathematical and diagrammatical approaches. Two cases are analyzed, in one of which the marginal revenue of any firm is assumed to decrease with an increase in the other firm's output, and in the other it is an increasing function of the other firm's output. In both cases the firms are assumed to have decreasing marginal costs.