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On continuity of Arrovian social welfare functions

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Abstract

We study continuity properties of Arrovian social welfare functions in the infinite population framework. We show that continuous welfare functions satisfying unanimity and independence of irrelevant alternatives are dictatorial. Weak anonymity is shown to be incompatible with continuity and unanimity: every continuous weakly anonymous social welfare function must be a constant function.

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Acknowledgements

We are grateful to Prof. M. Salles and an anonymous referee for their valuable comments. I want to thank the Yrjö Jahnsson Foundation for financial support.

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Correspondence to Hannu Salonen.

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Salonen, H., Saukkonen, K. On continuity of Arrovian social welfare functions. Soc Choice Welfare 25, 85–93 (2005). https://doi.org/10.1007/s00355-005-0030-x

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  • DOI: https://doi.org/10.1007/s00355-005-0030-x

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