Is the elasticity of taxable income mostly an income effect?

Xavier Dufour-Simard, Pierre-Carl Michaud and Michael Smart

Cahiers de recherche / Working Papers from Chaire de recherche Jacques-Parizeau en politiques économiques / Jacques-Parizeau Research Chair in Economic Policy

Abstract: We use variation in marginal tax rates and in tax bracket thresholds at which they apply in order to identify the substitution and income effects of tax reforms. We use a triple-difference estimator that exploits variation from subnational tax reforms, for which behavioral responses to taxes are identified even in the presence of unobservable shocks to the income distribution. While high-income taxpayers respond more to tax changes, our results suggest this reflects much more the income or salience effects of tax reforms, rather than inherent heterogeneity in substitution effects. We discuss the implications for optimal redistributive tax policies

Keywords: income and substitution effects; tax salience; optimal progressivity. (search for similar items in EconPapers)
JEL-codes: D31 H21 H24 (search for similar items in EconPapers)
Date: 2025
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