(1994), "Technological Change, Sectoral Shifts and the Distribution of Earnings: A Human Capital Model", Economica, (61:244), pp. 475-492.
The paper studies the long-run effect of technological change on a heterogeneous labour market. The innovation's impact on the allocation of workers between industries and on the distribution of earnings depends critically on how the technical change alters skill requirements. Skill-using inventions, which raise productivity and and skill requirements, increase inequality and tend to shift labour out of the innovating sector. Skill-neutral inventions cause neither changes in inequality nor, in general, sectoral shifts; skill-saving inventions reduce inequality and tend to shift labour towards the innovating sector. Only a skill-neutral invention can lead to a Pareto improvement.