We study the implications of microeconomic heterogeneity for aggregate technology, showing that the aggregate elasticity of substitution between capital and labor can be expressed as a simple function of plant level structural parameters and sufficient statistics for plant heterogeneity. This...

This paper constructs a multisectoral general equilibrium growth model based on Marshallian externalities. Using homogenous accumulation and production functions, an analytical solution is derived. Making use of the theory of nonnegative matrices, I discuss the properties of the model and derive...