Linkage of Regional Models

For several years the activities of the Regional Development Task at the International Institute for Applied Systems Analysis (IIASA) have been directed towards the development of a system of regional models, the elements of which were elaborated over. the period 1977-1979. The final stage of the work, which involves the coordination of these individually developed models, is now nearing completion. However, before this system can become fully operational, three major problems have to be overcome. They concern the modeling approach, level of aggregation, and method of coordination to be used. The linkage problem is examined in this paper