Abstract
In this study three possible determinants of the increase in the ratio between skilled and unskilled workers are tested together: R&D, organisational change, and foreign direct investment. After analysing the literature, these hypotheses are jointly tested using a SUR estimate. The results – regarding a panel of 488 Italian manufacturing firms over the period 1989–1997 – suggest the statistical significance of the impact of organisational change, while they tend to exclude a direct relation between R&D spending and skill upgrading. With reference to FDIs, the nature of the data and the results do not permit the exclusion of their possible influence.
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