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This paper focuses on a selected number of OECD countries and manufacturing sectors and shows the importance of sectoral diversity in the innovative process and in the relation between technology and world market share dynamics. The econometric exercise confirms the importance of technological variables in the relation with world market shares in two ways: first they are, in general, statistically significant, second the taxonomy of technological classes in terms of R&D intensity seems to be meaningful in disentangling the role played by sectoral diversity in the relation between embodied and disembodied investment and competitiveness. Sectoral diversity emerges in the statistical significance of the coefficients and in the time lag structure. Moreover, the values of estimated R&D parameters are correlated with the sectoral R&D intensity.