Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/271096 
Year of Publication: 
2023
Series/Report no.: 
KIT Working Paper Series in Economics No. 160
Publisher: 
Karlsruher Institut für Technologie (KIT), Institut für Volkswirtschaftslehre (ECON), Karlsruhe
Abstract: 
We study a voting model with partial information in which the evaluation of social welfare must be based on information about agents' top choices plus qualitative background conditions on preferences. The former is elicited individually, while the latter is not. The social evaluator is modeled as an imprecise Bayesian characterized by a set of priors over voters' complete ordinal preference profiles. We apply this 'frugal aggregation' model to multi-dimensional budget allocation problems and propose a solution concept of 'ex-ante' Condorcet winners. We show that if the social evaluator has symmetrically ignorant beliefs over profiles of quadratic preferences, the ex-ante Condorcet winners refine the set of Tukey medians (Tukey, 1975).
Subjects: 
Social choice under partial information
participatory budgeting
frugal aggregation
ex-ante Condorcet approach
Tukey median
JEL: 
D71
Document Type: 
Working Paper

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