Harsanyi's 'utilitarian theorem' and utilitarianism

@article{Risse2002HarsanyisT,
  title={Harsanyi's 'utilitarian theorem' and utilitarianism},
  author={M. Risse},
  journal={No{\^u}s},
  year={2002},
  volume={36},
  pages={550-577}
}
1.1 In 1955, John Harsanyi proved a remarkable theorem:' Suppose n agents satisfy the assumptions of von Neumann/Morgenstern (1947) expected utility theory, and so does the group as a whole (or an observer). Suppose that, if each member of the group prefers option a to b, then so does the group, or the observer (Pareto condition). Then the group's utility function is a weighted sum of the individual utility functions. Despite Harsanyi's insistence that what he calls the Utilitarian Theorem… Expand
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