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Moral Hazard, Income Taxation and Prospect Theory

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  • Ravi Kanbur
  • Jukka Pirttilä
  • Matti Tuomala

Abstract

The standard theory of optimal income taxation under uncertainty has been developed under the assumption that individuals maximise expected utility. However, prospect theory has now been established as an alternative model of individual behaviour, with empirical support. This paper explores the theory of optimal income taxation under uncertainty when individuals behave according to the tenets of prospect theory. It is seen that many of the standard results are modified in interesting ways. The first‐order approach for solving the optimisation problem is not valid over the domain of losses, and the marginal tax schedule offers full insurance around the reference consumption level. The implications of non‐welfarist objectives under income uncertainty are also examined.

Suggested Citation

  • Ravi Kanbur & Jukka Pirttilä & Matti Tuomala, 2008. "Moral Hazard, Income Taxation and Prospect Theory," Scandinavian Journal of Economics, Wiley Blackwell, vol. 110(2), pages 321-337, June.
    • Handle: RePEc:bla:scandj:v:110:y:2008:i:2:p:321-337
    DOI: 10.1111/j.1467-9442.2008.00541.x
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    1. Ravi Kanbur & Jukka Pirttilä & Matti Tuomala, 2006. "Non‐Welfarist Optimal Taxation And Behavioural Public Economics," Journal of Economic Surveys, Wiley Blackwell, vol. 20(5), pages 849-868, December.
    2. Charité, Jimmy & Fisman, Raymond & Kuziemko, Ilyana & Zhang, Kewei, 2022. "Reference points and redistributive preferences: Experimental evidence," Journal of Public Economics, Elsevier, vol. 216(C).
    3. Amedeo Piolatto & Gwenola Trotin, 2016. "Optimal Income Tax Enforcement under Prospect Theory," Journal of Public Economic Theory, Association for Public Economic Theory, vol. 18(1), pages 29-41, February.
    4. Gwenola Trotin & Amedeo Piolatto, 2011. "Optimal tax enforcement under prospect theory," Working Papers. Serie AD 2011-24, Instituto Valenciano de Investigaciones Económicas, S.A. (Ivie).
    5. Rablen, Matthew D., 2010. "Performance targets, effort and risk-taking," Journal of Economic Psychology, Elsevier, vol. 31(4), pages 687-697, August.
    6. Alex Rees-Jones & Dmitry Taubinsky, 2018. "Taxing Humans: Pitfalls of the Mechanism Design Approach and Potential Resolutions," Tax Policy and the Economy, University of Chicago Press, vol. 32(1), pages 107-133.
    7. Mehrmann, Annika & Sureth-Sloane, Caren, 2017. "Tax loss offset restrictions and biased perception of risky investments," arqus Discussion Papers in Quantitative Tax Research 222, arqus - Arbeitskreis Quantitative Steuerlehre.
    8. Becker, Johannes & Hopp, Daniel & Kriebel, Michael, 2020. "Mental accounting of public funds – The flypaper effect in the lab," Journal of Economic Behavior & Organization, Elsevier, vol. 176(C), pages 321-336.
    9. Hsu, Minchung & Yang, C.C., 2013. "Optimal linear and two-bracket income taxes with idiosyncratic earnings risk," Journal of Public Economics, Elsevier, vol. 105(C), pages 58-71.
    10. Marcelo Arbex & Enlinson Mattos, 2010. "Poverty and the Optimal General Income Tax-cum-Audit Policy," Working Papers 02-2010, Universidade de São Paulo, Faculdade de Economia, Administração e Contabilidade de Ribeirão Preto.
    11. Heutel, Garth, 2019. "Prospect theory and energy efficiency," Journal of Environmental Economics and Management, Elsevier, vol. 96(C), pages 236-254.
    12. Amit Kothiyal & Vitalie Spinu & Peter Wakker, 2011. "Prospect theory for continuous distributions: A preference foundation," Journal of Risk and Uncertainty, Springer, vol. 42(3), pages 195-210, June.
    13. Keisuke Morita, 2015. "Advance Tax Payments And Tax Evasion: A Note," The Singapore Economic Review (SER), World Scientific Publishing Co. Pte. Ltd., vol. 60(05), pages 1-10, December.
    14. Robin Boadway & Motohiro Sato, 2011. "Optimal Income Taxation with Uncertain Earnings: A Synthesis," CESifo Working Paper Series 3654, CESifo.
    15. Xianhua Dai, 2011. "Optimal Taxation under Income Uncertainty," Annals of Economics and Finance, Society for AEF, vol. 12(1), pages 121-138, May.

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    JEL classification:

    • D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty
    • H21 - Public Economics - - Taxation, Subsidies, and Revenue - - - Efficiency; Optimal Taxation

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