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| Ram Sewak Dubey, Giorgio Laguzzi and Francesco Ruscitti |
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| ''The existence of anonymous, stationary, monotone social welfare functions satisfying restricted dominance: an answer to an open question in intergenerational equity'' |
| ( 2026, Vol. 0 No.0 ) |
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| In this note, we consider social welfare functions on infinite utility streams and answer an open question posed in Asheim et al (2021, Remark 1).
There exists a real-valued representation of social welfare preferences that satisfies monotonicity, stationarity, restricted dominance, and strong anonymity, hence also finite anonymity.
Our social welfare function satisfies a stronger finite-rank sensitivity condition, Liminf-Restricted Dominance, in the sense of Asheim et al. (2022) and Asheim et al. (2025).
Our construction shows that limited discontinuity is not redundant in Asheim et al. (2021, Proposition 2): once that diagonal continuity condition is dropped, even arbitrary-permutation invariance can coexist with stationarity and non-trivial sensitivity. |
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| Keywords: Strong Anonymity, Restricted Dominance, Social Welfare Function, Stationarity. |
JEL: D7 - Analysis of Collective Decision-Making: General
D9 - Intertemporal Choice and Growth: General |
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| Manuscript Received : Jun 14 2026 | | Manuscript Accepted : Oct 10 2026 |
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