We study the optimal taxation of risk-free and excess capital income with heterogeneous rates of return, alongside an optimal nonlinear earnings tax. Households can hold three assets: one risk-free, one risky but diversifiable, and one a private investment with idiosyncratic risk whose expected...

There is increasing empirical evidence that people systematically differ in their rates of return on capital. We derive optimal non-linear taxes on labor and capital income in the presence of such return heterogeneity. We allow for two distinct reasons why returns are heterogeneous: because...

The paper considers governments' public procurement decision as a way of influencing industry structure. In a federation in which capital is mobile and capital taxation is harmonized, a home bias in public procurement can potentially be explained as an effort to increase the capital intensity of...