We implement capital in an endogenous separations New Keynesian matching model. In contrast to the vintage capital … theory, we suggest a more general approach, such that workers have unrestricted access to a proportional share of the capital … stock. We find that the introduction of capital generates an important channel for the transmission of aggregate …

This paper estimates the elasticity of substitution between capital and skill using variation across U.S. counties in … immigration-induced skill-mix changes between 1860 and 1930. We find that capital began as a q-complement for skilled and … parametric production function calibrated to our estimates imply the level of capital-skill complementarity after 1890 likely …