Abstract
This paper shows that capital-skill complementarity provides a quantitatively signifficant rationale to tax capital for redistributive governments. The optimal capital income tax rate is 60%, which is signifficantly higher than the optimal rate of 48% in an identically calibrated model without capital-skill complementarity.
The skill premium falls from 1.9 to 1.67 along the transition following the optimal reform in the capital-skill complementarity model, implying substantial indirect redistribution from skilled to unskilled workers. These results show that a government that cares about redistribution should take into account capital-skill complementarity in production when setting the tax rate on capital income.