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Moral Rules, the Moral Sentiments, and Behavior: Toward a Theory of an Optimal Moral System

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  • Louis Kaplow
  • Steven Shavell

Abstract

How should moral sanctions and moral rewards—the moral sentiments involving feelings of guilt and of virtue—be employed to govern individuals’ behavior if the objective is to maximize social welfare? In the model that we examine, guilt is a disincentive to act and virtue is an incentive because we assume that they are negative and positive sources of utility. We also suppose that guilt and virtue are costly to inculcate and are subject to certain constraints on their use. We show that the moral sentiments should be used chiefly to control externalities and further that guilt is best to employ when most harmful acts can successfully be deterred whereas virtue is best when only a few individuals can be induced to behave well. We also contrast the optimal use of guilt and virtue to optimal Pigouvian taxation and discuss extensions of our analysis.

Suggested Citation

  • Louis Kaplow & Steven Shavell, 2007. "Moral Rules, the Moral Sentiments, and Behavior: Toward a Theory of an Optimal Moral System," Journal of Political Economy, University of Chicago Press, vol. 115(3), pages 494-514.
    • Handle: RePEc:ucp:jpolec:v:115:y:2007:p:494-514
    DOI: 10.1086/519927
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    References listed on IDEAS

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    1. Thaler, Richard H & Shefrin, H M, 1981. "An Economic Theory of Self-Control," Journal of Political Economy, University of Chicago Press, vol. 89(2), pages 392-406, April.
    2. Louis Kaplow & Steven Shavell, 2001. "Moral Rules and the Moral Sentiments: Toward a Theory of an Optimal Moral System," NBER Working Papers 8688, National Bureau of Economic Research, Inc.
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