Online Social Choice and Welfare Seminar: Snow Zhang, Tuesday 3 March
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Marcus Pivato
Feb 24, 2026, 4:32:02 PMFeb 24
to social-choice-a...@googlegroups.com, com...@duke.edu
[with apologies for cross-posting]
Dear all,
The next presentation in the Online Social Choice and Welfare Seminar will be next Tuesday (3 March). Here are the details.
Time: 5PM GMT (9AM Berkeley, 12PM Montréal/Toronto, 2PM Rio de Janeiro, 5PM London, 6PM Paris, 8PM Istanbul, 10:30PM New Delhi)
Speaker: Snow Zhang (University of California, Berkeley)
Title: "Coherent combinations of experts' opinions"
Abstract. One popular rule for aggregating multiple experts' point estimates is linear averaging. However, this rule is incompatible with Bayesian conditionalization except in trivial cases of expert consensus (Dawid et al., 1995; Ranjan & Gneiting, 2010; Bradley, 2018; Gallow, 2018). This paper proves a generalization of this impossibility result. If time permits, we'll also discuss how to extend the analysis to the imprecise setting.
Dear all,
The next presentation in the Online Social Choice and Welfare Seminar will be next Tuesday (3 March). Here are the details.
Time: 5PM GMT (9AM Berkeley, 12PM Montréal/Toronto, 2PM Rio de Janeiro, 5PM London, 6PM Paris, 8PM Istanbul, 10:30PM New Delhi)
Speaker: Snow Zhang (University of California, Berkeley)
Title: "Coherent combinations of experts' opinions"
Abstract. One popular rule for aggregating multiple experts' point estimates is linear averaging. However, this rule is incompatible with Bayesian conditionalization except in trivial cases of expert consensus (Dawid et al., 1995; Ranjan & Gneiting, 2010; Bradley, 2018; Gallow, 2018). This paper proves a generalization of this impossibility result. If time permits, we'll also discuss how to extend the analysis to the imprecise setting.
To obtain the Zoom link, please subscribe to the Seminar Mailing List, or contact one of the organisers.
Reminder: On the seminar website you can find the video recordings, slides and supplementary materials for all past presentations, as well as information about future presentations.
--
Marcus Pivato
Centre d'Économie de la Sorbonne
Centre d'Économie de la Sorbonne
Université Paris 1 Panthéon-Sorbonne
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