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On aggregation with expressive preferences: an aspect of the social choice of Brexit

Thursday 23 January 2020, 1.00PM to - 2.00 pm

Speaker(s): Anindya Bhattacharya (DERS)

Abstract: In this paper we study problems of collective choice when individuals can have expressive preferences: i.e., where a decision-maker may care not only about the material benefit from choosing an action but also about some intrinsic morality of the action or whether the action conforms to some identity-marker of herself. We construct a simple framework for analyzing aggregation problems with such expressive preferences and present some initial results focussing on the phenomenon we call ``Brexit anomaly". The main findings are that while deterministic aggregation is quite susceptible to Brexit anomaly, probabilistic aggregation may assure (comparatively) more positive results.

Location: Staff Room - A/EC202

Admission: Staff and PhD