| Abstract: | The formidable expansion in the scope of the United Nations International Comparison Project has brought into evidence limitations of the methodology used in the first three phases. The author considers that there are two indispensable conditions needed to give renewed impetus to the ICP: (a) the objectives must be redefined, and (b) the methodology must be built on an entirely new basis. He considers the broad lines of such an evolution to be the following. (a) The objective of volume comparison must be kept distinct from that of purchasing power comparison, given that both the basic material and the formulae to be used at the aggregate level differ in the two cases. (b) At the basic heading level, it is proposed, for both volume and purchasing power comparisons, to replace the multilateral approach by a “minimum scale” binary and unilateral approach, and to use the EKS method. This will make possible an improvement in the accuracy of the estimates, a reduction in the overall costs, and a drastic reduction in execution time. What is more, it would be possible to regionalize the worldwide comparison, in the sense that the results of the basic heading comparisons already obtained at the regional level for regional purposes can be used as an input in the framework of the worldwide comparison. At the aggregate level, in the framework of volume comparison, it is proposed that a constant price procedure in the spatial sense should continue to be used. It is, however, proposed that the prices of the set of countries (GK) be replaced by a structure of common “equi-distant” prices (G). This would permit the elimination of the significant systematic distortions observed in the comparison between rich and poor countries in the first three phases of ICP. What is more, this gives maximum stability to results obtained for the same countries at different geographical levels. By using a set of common “equi-distant” quantities, the same advantage can be obtained in the purchasing power comparison. |
