This paper studies the optimal growth of a developing economy that has
a choice to expend a fixed amount of resource for a structural change
that advances its production technology. It is shown that structural
change is undertaken if capital stock is above a critical level. Econo
mies undertaking structural change converge to a larger steady state a
nd economies not undertaking structural change converge to a smaller s
teady state. The optimal policy correspondences and growth paths are c
haracterized. The social optimum is shown implementable by a competiti
ve equilibrium with lump-sum taxation.