The papers in this volume fall into two groups: the first deals with the linkage of input-output models and describes several models that are now ready to be linked, while the second concentrates on the analysis of structural change as well as reporting recent developments in the INFORUM group of models. Some of the papers in the first group examine the linkage of seven national models using the INFORUM international trade model, the development of a linked system for modeling the small open economies of the Nordic countries, and the definition of an appropriate international scenario for a single national model. Others discuss problems of disaggregation, the relationship between regional and national models, and the role of input-output models as policy-making tools. The section closes with papers on national models for Poland and Finland and a report describing the price-income block of the advanced US INFORUM model. The second group opens with analyses of factor inputs and of energy-economy interactions. It continues with suggestions on how to develop consistent dynamic input-output models using poor data bases and describes how an input-output model can be used to derive aggregate characteristics of probable future structural change. Further papers are devoted to changes in technical coefficients, the development of effective national models using limited or inconsistent data bases, and estimation techniques. The volume closes with a "system for systems design" for use in input-output related work
