Optimal Taxation and Welfare Economics

The study of optimal taxation and welfare economics examines how governments can design tax systems that maximise social welfare while accounting for economic distortions. Drawing on the Ramsey and Mirrlees frameworks, it balances efficiency and equity by incorporating behavioural responses to taxation and the diminishing marginal utility of income. The field seeks to minimise excess burden in raising revenue for public goods and redistribution, exploring nonlinear and piecewise linear tax schedules, the marginal cost of public funds and distributional weights. Recent theoretical innovations include non-parametric identification of welfare functionals, integration of discrete choice models and analysis of taxation in the presence of automation and digital capital. Empirical applications—such as earnings subsidies, earned income tax credits and targeted tuition grants—demonstrate how optimally structured brackets and subsidies can improve efficiency without compromising equity. The discipline’s global relevance spans poverty reduction in developing economies, the fiscal implications of hyper-globalisation and the adaptation of welfare frameworks to contemporary policy challenges.

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Optimal Taxation and Welfare Economics publication trend

The graph below shows the total number of articles in optimal taxation and welfare economics across all publications each year (not limited to Nature Index journals).

Technical terms

Pareto efficiency: A state in which no individual’s welfare can be improved without reducing another’s.

Behavioural response: Changes in labour supply or consumption resulting from tax incentives or disincentives.

Distributional weight: A factor reflecting the relative social value assigned to an additional unit of income for individuals at different income levels.

Marginal cost of public funds: The welfare loss incurred by society when raising an extra unit of revenue through taxation.

Money-metric welfare: A welfare measure expressed in monetary terms equivalent to the utility derived from consumption choices.

References

1. Pareto‐Improving Tax Reforms and the Earned Income Tax Credit. Econometrica (2023).
2. Incorporating Social Welfare in Program-Evaluation and Treatment Choice. The Review of Economics and Statistics (2024).
3. Optimal Taxation in Theory and Practice. Journal of Economic Perspectives (2009).
4. The marginal cost of public funds is one at the optimal tax system. International Tax and Public Finance (2018).
5. Optimal Piecewise Linear Income Taxation. Journal of Public Economic Theory (2014).
6. Optimal Taxation of Robots. Journal of the European Economic Association (2022).
7. Egalitarian redistribution in the era of hyper-globalization. Review of Social Economy (2020).
8. Rising markups and optimal redistributive taxation. International Tax and Public Finance (2021).
9. Optimal taxation and public provision for poverty reduction. International Tax and Public Finance (2017).