This paper emphasizes the role of skill distribution in determining the optimal marginal tax rates. It rigorously shows that the optimal marginal tax rates can be strictly increasing, strictly decreasing, U-shaped, or inverse U-shaped as skill increases depending on the skill distribution.

In his seminal paper Galor [A two-sector overlapping generations-model: a global characterization of the dynamical system, Econometrica 60 (1992) 1351-1386] establishes conditions for the existence of equilibrium in the two-sector overlapping generations (OLG) model. Although appealing...