We analyze the optimal nonlinear income tax schedule when taxpayers earn multiple incomes and differ along many unobserved dimensions. We derive the necessary conditions for the government’s optimum using both a tax perturbation and a mechanism design approach, and show that both methods...

We propose a new method, that we call an allocation perturbation, to derive the optimal nonlinear income tax schedules with multidimensional individual characteristics on which taxes cannot be conditioned. It is well established that, when individuals differ in terms of preferences on top of...

We propose a new method, that we call an allocation perturbation, to derive the optimal nonlinear income tax schedules with multidimensional individual characteristics on which taxes cannot be conditioned. It is well established that, when individuals differ in terms of preferences on top of...

We study how regional productivity differences and labor mobility shape optimal Mirrleesian tax-transfer schemes. When tax schedules are not allowed to differ across regions, productivity-enhancing inter-regional migration exerts a downward pressure on optimal marginal tax rates. When regionally...

We study how regional productivity differences and labor mobility shape optimal Mirrleesian tax-transfer schemes. When tax schedules are not allowed to differ across regions, productivity-enhancing interregional migration exerts a downward pressure on optimal marginal tax rates. When regionally...