comsoc-seminar February 2019

comsoc-seminar@list.uva.nl

1 participants
2 discussions

[COMOSC Seminar] Marija Slavkovik on Thursday and Arianna Novaro on Friday
by Ulle Endriss 25 Feb '19

25 Feb '19

Dear all, This week we are going to have two talks in the Computational Social Choice Seminar at the ILLC, both of them related to judgment aggregation, but deviating from the standard model in different ways. On Thursday at 15:00 Marija Slavkovik (Bergen) will speak about aggregating likelihood judgments, and on Friday at 16:00 Arianna Novaro (Toulouse) will speak about goal-based voting. I include both abstracts below. As always, for more information on the COMSOC Seminar, please consult https://staff.science.uva.nl/u.endriss/seminar/. All the best, Ulle ------------------------------------------------------------------------- Speaker: Marija Slavkovik (Bergen) Title: Aggregation of Likelihood Judgments Date: Thursday 28 February 2019 Time: 15:00 Location: Room F1.15, Science Park 107, The Netherlands Abstract: Judgment aggregation studies methods for aggregating individual opinions on logically related issues. So far, concrete aggregators have been proposed only for aggregating binary, or Boolean, judgments. However, opinion sources do not always provide binary judgments. Sometimes we have judgments expressing likelihood, not certainty, of whether a proposition is true. We here propose a framework and a first set of specific aggregation methods for aggregating likelihood judgments. Our aggregation methods are mainly obtained by generalizing known classic judgment aggregation methods that satisfy some essential desirable properties. ------------------------------------------------------------------------- Speaker: Arianna Novaro (Toulouse) Title: Collective Decisions with Logic-based Goals Date: Friday 1 March 2019 Time: 16:00 Location: Room F1.15, Science Park 107, Amsterdam Abstract: In this talk I will present the framework of goal-based voting, where agents express their individual goals as formulas of propositional logic, with the common objective of reaching a collective decision (e.g., which points of interest to visit together when exploring a new city). I will present some voting rules for this setting, adapted from the literature on Social Choice Theory, which will then be studied from both an axiomatic and a computational perspective. In the final part, I will focus on agents acting strategically, i.e., agents reporting a goal that differs from their truthful one if by doing so they can get a better outcome. -- Ulle Endriss ILLC, University of Amsterdam http://www.illc.uva.nl/~ulle/

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[COMOSC Seminar] Femke Bekius this Friday at 16:00
by Ulle Endriss 06 Feb '19

06 Feb '19

Dear all, This is your reminder for the next edition of the Computational Social Choice Seminar at the ILLC. Femke Bekius (TU Delft) will speak about the use of concepts from game theory to model complex decision making scenarios. I hope to see you at the seminar this Friday! All the best, Ulle ------------------------------------------------------------------------- Speaker: Femke Bekius (Delft) Title: Game Concepts to Understand Collective Decision-Making on Complex Systems Date: Friday 8 February 2019 Time: 16:00 Location: Room F1.15, Science Park 107, Amsterdam Abstract: Real-world decision-making on complex systems is complex due to the technical uncertainties of the system: multiple actors with different incentives are involved and the environment in which the decision-making takes place is dynamic. To understand the process of such collective decision-making we look for patterns and mechanisms that characterize these processes. These patterns and mechanisms, so-called game concepts, origin from game theory and public administration. In this talk, I will present the approach of applying game concepts to real-world decision-making processes, both in a descriptive and in a prescriptive way. This means that we are not only interested in the theoretical insights, but also how the approach can enable decision-makers in their daily work. The application area of this research is the Dutch railway sector, hence examples from this area will be used. The talk will be broadly accessible and no prior knowledge of either the theoretical concepts or the application domain will be assumed. For more information on the Computational Social Choice Seminar, please consult https://staff.science.uva.nl/u.endriss/seminar/. -- Ulle Endriss ILLC, University of Amsterdam http://www.illc.uva.nl/~ulle/

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comsoc-seminar February 2019