  The characteristics inherent in a Domar aggregation, when all sectoral
productions embody a common nonneutral elasticity of substitution, is examined.
There, the general equilibrium propagation of productivity changes entails
structural transformation that brings nonlinearities in their aggregation into
price indices. We show that negative singularity, such that a finite
productivity decrease induces an infinitely large price, is possible in an
inelastic economy, while positive singularity, such that a finite productivity
increase induces a zero price, is possible in an elastic economy. Regarding the
aggregate outputs, two independent productivity changes will have synergism in
an elastic economy, whereas negative synergism will be prevalent in an
inelastic economy. Neither issue is of concern in a Cobb-Douglas economy where
the elasticity of substitution is everywhere neutral.
