Although it is well known that wage inequality has evolved over recent decades, it is not known the extent to which the evolution of wage inequality is attributed to observed factors such as capital and labor quantities or unobserved factors such as labor-augmenting technology in many countries. To examine this issue, we use cross-country panel data from 14 OECD countries for the years 1970 to 2005 and estimate the aggregate production function extended to allow for capital-skill complementarity and skill-biased technological change. Our results point to a strong influence of the observed expansion of ICT capital equipment relative to high-skilled labor around the world.
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