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We propose a multi-sector model of endogenous growth in which structural change occurs according
to a price effect between intermediates inputs. The unique nal good, which can be consumed or used as capital,
is produced using two intermediate goods, into a CES production function. The two intermediate sectors dier in
terms of knowledge accumulation, in sector 1 workers devote a fraction u of their time endowment to knowledge
accumulation "à la Romer"; in sector 2 they produce only. In this framework we can consider intermediate goods
as complement or substitute; this differentiation leads to two dierent paths for structural change. We characterize
two different Non-Balanced Growth Paths (NBGP) with respect to the value of the elasticity of substitution between
the two intermediate goods which are consistent with structural change. Labor and capital are indeed reallocated in
the knowledge intensive sector when inputs are substitutes, and in the other sector when they are complements. The
aggregate behavior of this model, along the equilibrium path, is also consistent with the Kaldor facts. Additionally we
show the persistence of inequalities, in human and physical capital, through the \manifold of steady-states" feature
during the growth process, and that there is conditional convergence.
