Explaining Taxes at the Upper Tail of the Income Distribution: The Role of Utility Interdependence

Samano, Daniel (2009): Explaining Taxes at the Upper Tail of the Income Distribution: The Role of Utility Interdependence.

Abstract

Optimal tax theory has difficulty rationalizing high marginal tax rates at the upper end of the income distribution. In this paper, I construct a model of optimal income taxation in which agents' preferences are interdependent. I derive a simple expression for optimal taxes that accommodates consumption externalities within Mirrlees (1971) framework. Using this expression, I conduct a positive analysis of taxation: assuming that observed taxes are optimal, I derive analytic expressions for i) a parameter that measures the degree of agents' utility interdependence and ii) a function that quantifies the consumption externality agents of different income impose to society. Using these expressions, I rationalize income taxes in the United States and the United Kingdom for the 1995-2004 period. I show that only a moderate amount of utility interdependence is su±cient for this. My estimations indicate that the progressivity of tax schedules may be driven by corrective considerations.

• Item Type: MPRA Paper
• Language: English
• Keywords: optimal non-linear taxation, relative consumption, utility interdependence, rationalization.
• Subjects: H - Public Economics > H2 - Taxation, Subsidies, and Revenue > H21 - Efficiency ; Optimal Taxation; D - Microeconomics > D6 - Welfare Economics > D62 - Externalities; H - Public Economics > H2 - Taxation, Subsidies, and Revenue > H23 - Externalities ; Redistributive Effects ; Environmental Taxes and Subsidies

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