Hans Holter, Dirk Krueger, Serhiy Stepanchuk, 20 February 2015

Since the Global Crisis, debt sustainability has received increasing attention. This column argues that the maximum sustainable debt level depends negatively on the progressivity of the tax system. The authors estimate that the US is still relatively far from the peak of its Laffer curve and from its maximally sustainable debt level. However, adopting a flat tax would raise the maximum sustainable debt from 330% to more than 350% of benchmark GDP, whereas adopting Danish-style progressivity would lower it to less than 250%.

Nezih Guner, Martin Lopez-Daneri, Gustavo Ventura, 05 October 2014

Recent calls for closing fiscal deficits have been combined with proposals to shift the tax burden and increase marginal tax rates on higher earners. This column argues that revenue-maximising tax rates for high earners in the US would be substantially higher than current rates. However, increasing tax rates for high earners would not raise much additional revenue.

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