This paper analyzes the labor market effects of an increase in incentives i
n raising total factor productivity and, thus, reallocating high-skilled la
bor from production to non-production (i.e., R&D) activities. Within an end
ogenous growth framework, it is shown that such a reallocation of skilled l
abor depresses the demand for low-skilled labor. Contrary to the standard v
iew of skill-biased technological change, the relative marginal productivit
y of labor changes only because of relative employment effects. Moreover, t
he impact of social comparisons between high-skilled and low-skilled worker
s and within the group of low-skilled workers are examined.