Hakki Yazici

Optimal Life-cycle Capital Taxation under Self-Control Problems

We study optimal taxation of savings in an economy where agents face self-control problems and are allowed to be partially naive. We assume that the severity of self-control problems changes over the life-cycle. We focus on quasihyperbolic discounting with constant elasticity of intertemporal substitution utility functions and linear Markov equilibria. We derive explicit formulas for optimal taxes that implement the efficient allocation. We show that if agents’ ability to self-control increases concavely with age, then savings should be subsidized and the subsidy should decrease with age. We also show that allowing for age-dependent self-control problems creates large effects on the level of optimal subsidies, while optimal taxes are not very sensitive to the level of sophistication. JEL classification: E21, E62, D03. Keywords: Self-control problems, Linear Markov equilibrium, Life cycle taxation of savings.

Machines, Buildings, and Optimal Dynamic Taxes

The effective taxes on capital returns differ depending on capital type in the U.S. tax code. This paper uncovers a novel reason for the optimality of differential capital taxation. We set up a model with two types of capital – equipments and structures – and equipment-skill complementarity. Under a plausible assumption, we show that it is optimal to tax equipments at a higher rate than structures. In a calibrated model, the optimal tax differential rises from 27 to 40 percentage points over the transition to the new steady state. The welfare gains of optimal differential capital taxation can be as high as 0.4% of lifetime consumption.

On the Optimal Skill Distribution in a Mirrleesian Economy

People are heterogenous in the skills by which they turn eort into output. A central question in normative public economics is how to redistribute resources from more- to less-skilled individuals eciently. In addition to income taxation, this paper considers another policy tool of redistribution by allowing planner to choose the dispersion of skill distribution given the average skill level of the economy. We nd that, depending on the parameters of the model, either perfectly unequal skill distribution in which one group has a very high skill level and the rest are completely unskilled, or perfectly equal skill distribution in which all agents have the same skill level, is socially optimal, but an interior level of skill inequality is never optimal. We then provide conditions on the parameters under which perfectly equal and perfectly unequal skill distributions are optimal.