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This paper investigates the role of each of these influences and several other elements of advanced technology and innovation. The present analysis improves on most prior work in many important respects. First, the appropriate economy-wide measures of factor abundance are used instead of interindustry comparisons which do not adequately convey such information. Secondly, an unusually broad variety of different concepts of technology is examined within a consistent data set. Thirdly, each facet of technology is measured in considerable industrial detail, at the three-digit SIC level within manufacturing. Since three-digit industries contained within a two-digit sector often have extremely different technological characteristics, this industry detail constitutes an important advantage. Fourthly, all concepts are measured at each stage of fabrication, as determined from the total requirements version of the input-output table.[2] Fifthly, similar consistent and detailed measures of occupational skill and capital intensity, in constant dollars, are included for purposes of comparison. These advantages permit a far more conclusive examination than ever previously conducted of the extent to which science-technology, rather than labour skills or capital, differentiates the United States economy from the rest of the world and of exactly what elements of science and technology most strongly distinguish the United States economy. [ABSTRACT FROM AUTHOR]