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Keywords:optimal taxation OR Optimal taxation OR Optimal Taxation 

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How Should Tax Progressivity Respond to Rising Income Inequality?

We address this question in a heterogeneous-agent incomplete-markets model featuring exogenous idiosyncratic risk, endogenous skill investment, and flexible labor supply. The tax and transfer schedule is restricted to be log-linear in income, a good description of the US system. Rising inequality is modeled as a combination of skill-biased technical change and growth in residual wage dispersion. When facing shifts in the income distribution like those observed in the US, a utilitarian planner chooses higher progressivity in response to larger residual inequality but lower progressivity in ...
Staff Report , Paper 615

Working Paper
Optimal Taxation with Endogenous Default under Incomplete Markets

How are the optimal tax and debt policies affected if the government has the option to default on its debt? We address this question from a normative perspective in an economy with noncontingent government debt, domestic default and labor taxes. On one hand, default prevents the government from incurring future tax distortions that would come along with the service of the debt. On the other hand, default risk gives rise to endogenous credit limits that hinder the government's ability to smooth taxes. We characterize the fiscal policy and show how the option to default alters the near-unit ...
International Finance Discussion Papers , Paper 1297

Working Paper
Optimal Paternalistic Savings Policies

We study optimal savings policies when there is a dual concern about undersaving for retirement and income inequality. Agents differ in present bias and earnings ability, both unobservable to a planner with paternalistic and redistributive motives. We characterize the solution to this two-dimensional screening problem and provide a decentralization using realistic policy instruments: mandatory savings at low incomes but a choice between subsidized savings vehicles at high incomes?resembling Social Security, 401(k), and IRA accounts in the US. Offering more savings choice at higher incomes ...
Opportunity and Inclusive Growth Institute Working Papers , Paper 17

Working Paper
Optimal Need-Based Financial Aid

We study the optimal design of student financial aid as a function of parental income. We derive optimal financial aid formulas in a general model. For a simple model version, we derive mild conditions on primitives under which poorer students receive more aid even without distributional concerns. We quantitatively extend this result to an empirical model of selection into college for the United States that comprises multidimensional heterogeneity, endogenous parental transfers, dropout, labor supply in college, and uncertain returns. Optimal financial aid is strongly declining in parental ...
Opportunity and Inclusive Growth Institute Working Papers , Paper 14

Working Paper
Optimal Fiscal Policy in Overlapping Generations Models

In this paper, we explore the proposition that the optimal capital income tax is zero using an overlapping generations model. We prove that for a large class of preferences, the optimal capital income tax along the transition path and in steady state is non-zero. For a version of the model calibrated to the US economy, we find that the model could justify the observed rates of capital income taxation for an empirically reasonable intertemporal utility function and a robust demographic structure.
Working Papers , Paper 2017-32

Working Paper
Flexible Retirement and Optimal Taxation

This paper studies optimal insurance against private idiosyncratic shocks in a life-cycle model with intensive labor supply and endogenous retirement. In this environment, the optimal labor tax is hump-shaped in age: insurance benefits of taxation push for increasing-in-age taxes while rising labor supply elasticities and optimal late retirement of highly productive workers push for lowering taxes for old workers. In calibrated numerical simulations, the optimum achieves sizable welfare gains that age-dependent taxes do not deliver under the status quo US Social Security. Nevertheless, an ...
Working Paper Series , Paper WP-2018-18

Working Paper
Taxing Capital? The Importance of How Human Capital is Accumulated

This paper considers the impact of how human capital is accumulated on optimal capital tax policy in a life cycle model. In particular, it compares the optimal capital tax when human capital is accumulated exogenously, endogenously through learning-by-doing, and endogenously through learning-or-doing. Previous work demonstrates that in a simple two generation life cycle model with exogenous human capital accumulation, if the utility function is separable and homothetic in each consumption and labor, then the government has no motive to condition taxes on age or tax capital. In contrast, this ...
Finance and Economics Discussion Series , Paper 2015-117

Working Paper
Do Mortgage Subsidies Help or Hurt Borrowers?

Mortgage subsidies affect homeownership costs by reducing effective mortgage rates and increasing house prices. I show analytically the role of mortgage subsidies in determining house price changes, economic incidence, and efficiency costs using a theoretical framework for applied welfare analysis. I derive simple expressions for these effects, as functions of reduced-form sufficient statistics, which I use to measure the effects from eliminating mortgage deductions. My main results characterize the distributional impact of mortgage subsidies among buyers and owners and how house price ...
Finance and Economics Discussion Series , Paper 2016-081

Working Paper
On the Optimality of Differential Asset Taxation

How should a utilitarian government balance redistributive concerns with the need to provide incentives for business creation and investment? Should they tax business profits, the (risk-free) savings of owners, or some combination of both? To address this question, this paper presents a model in which the desirability of differential asset taxation emerges endogenously from the presence of agency frictions. I consider an environment in which entrepreneurs hire workers and rent capital to produce output subject to privately observed shocks and have the ability to both divert capital to private ...
Working Papers , Paper 201917

Working Paper
The Optimal Taxation of Business Owners

Business owners in the United States are disproportionately represented among the very wealthy and are exposed to substantial idiosyncratic risk. Further, recent evidence indicates business income primarily reflects returns to the human (rather than financial) capital of the owner. Motivated by these facts, this paper characterizes the optimal taxation of income and wealth in an environment where business income depends jointly on innate ability, luck, and the accumulated past effort exerted by the owner. I show that in (constrained) efficient allocations, more productive entrepreneurs ...
Working Papers , Paper 201926

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