Abstract
This article describes some characteristics of the Correlates of War Project's data set on national capabilities, in particular the difficulty of generating systemic measures in the presence of missing data. Some historical and statistical procedures are developed and applied to the data set for the period from 1950–1980. The resulting, aggregate measures of national power capabilities are displayed and evaluated. In general, for systemic, aggregate analyses, the developed statistical procedures produce results that are consonant with many contemporary accounts of contemporary power, relations.

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