Itai Sher

This paper concerns Saez and Stantcheva’s (2016) generalized social marginal welfare weights (GSMWW), which are used to aggregate losses and gains due to the tax system, while incorporating non-utilitarian ethical considerations. That approach evaluates local changes in tax policy without appealing to a global social objective. However, I argue that local comparisons between different tax systems implicitly entail global comparisons. Moreover, whenever welfare weights are not of a utilitarian kind, these implied global comparisons are inconsistent. Part of the motivation for the GSMWW approach is that it provides a way to incorporate broader ethical judgements into the evaluation of the tax system while preserving the Pareto principle. I suggest that the problems with the approach ought to spark a reconsideration of Pareto if one wants to represent broader values in formal policy analysis.

Publication Type
Working Paper
File Description
First version, February 15, 2021
JEL Codes
D63: Equity; Justice; Inequality; and Other Normative Criteria and Measurement
H21: Taxation and Subsidies: Efficiency; Optimal Taxation
H23: Taxation and Subsidies: Externalities; Redistributive Effects; Environmental Taxes and Subsidies
welfare weights
optimal taxation
Pareto principle