Expected value, to a point: Moral decision‐making under background uncertainty.

Expected value maximization gives plausible guidance for moral decision‐making under uncertainty in many situations. But it has unappetizing implications in 'Pascalian' situations involving tiny probabilities of extreme outcomes. This paper shows, first, that under realistic levels of 'background un...

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Publicado en:Nous (0029-4624) Vol. 59; no. 4; pp. 1093 - 1126
Autor principal: Tarsney, Christian
Formato: Artículo
Publicado: Wiley-Blackwell Dec2025
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Acceso en línea:Ver este registro en EBSCOhost
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        atl: Expected value, to a point: Moral decision‐making under background uncertainty.
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        au: Tarsney, Christian
        affil: University of Texas at Austin
      su:
        Stochastic dominance
        Expected utility
        Decision theory
        Risk aversion
        Utility functions
        Ethical decision making
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          Stochastic dominance
          Expected utility
          Decision theory
          Risk aversion
          Utility functions
          Ethical decision making
      ab: Expected value maximization gives plausible guidance for moral decision‐making under uncertainty in many situations. But it has unappetizing implications in 'Pascalian' situations involving tiny probabilities of extreme outcomes. This paper shows, first, that under realistic levels of 'background uncertainty' about sources of value independent of one's present choice, a widely accepted and apparently innocuous principle—stochastic dominance—requires that prospects be ranked by the expected value of their consequences in most ordinary choice situations. But second, this implication does not hold when differences in expected value are driven by tiny probabilities of extreme outcomes. Stochastic dominance therefore lets us draw a surprisingly principled line between 'ordinary' and 'Pascalian' situations, providing a powerful justification for de facto expected value maximization in the former context while permitting deviations in the latter. Drawing this distinction is incompatible with an in‐principle commitment to maximizing expected value, but does not require too much departure from decision‐theoretic orthodoxy: it is compatible, for instance, with the view that moral agents must maximize the expectation of a utility function that is an increasing function of moral value.
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    language: English
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