A S the pages of this journal testify,' economists recently have displayed a lively interest in the trend of industrial concentration. Those fearful of increased concentration in years to come are likely to be particularly concerned over the implications of continued heavy defense outlays. Although the evidence is far from convincing, many believe that the World War II mobilization program intensified industrial concentration. The issue examined in this article is whether a particular mobilization measure, accelerated tax amortization, has contributed toward increased concentration in American manufacturing industries during the current defense build-up.

This set of studies investigates the nature and magnitude of the redistribution of income throughout the world. Each of the distinguished authors addresses questions as complex as how governmental social policies effected the redistribution of income and what were the consequences.

R EGIONAL analysis has received an increasing amount of attention recently, a reflection in part of the growing volume of national macro-economic studies that point up the significance of regional compositions and regional patterns of behavior. This paper attempts to demonstrate the usefulness and flexibility of interindustry (or input-output) models for regional analysis. Specifically, the paper has three objectives: (i) to present an interindustry model for the state of Utah with a discussion of the problems both conceptual and empirical that arise in a model of this type; (2) to develop some measures for estimating the importance of individual industries in the regional economy via the calculation of income and employment multipliers; (3) to present some methods by which dynamic elements can be introduced into the static system. This is a necessary element if the model is to be used for the analysis of regional business cycles, industrial growth and technological change, or for the computation of period (that is, truncated) multipliers. The static model is useful in a number of ways, as we attempt to show, not the least of which is its usefulness as a social accounting device for the region; but, for more careful analyses of the problems mentioned above, a partially dynamic formulation is desirable.