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The process of submitting thematic tracks, panels, and sessions for the GDN2026 conference is currently underway. Submissions can be sent via email to: This email address is being protected from spambots. You need JavaScript enabled to view it., including a short description of the track using the template: GDN-2026-stream-proposal-form.docx. More information about the GDN2026 events, their organisation, and deadlines can be found on the conference homepage: https://gdnconference.org/gdn2026/
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From June 15 to 18, 2025, the 25th edition of the international scientific conference Group Decision and Negotiation took place in Zaragoza. For years, this conference has served as an international forum for the exchange of ideas among researchers and practitioners working on the interdisciplinary issues of negotiation and group decision-making. GDN 2025 (https://gdnconference.org/gdn2025/) was organized by the University of Zaragoza, under the scientific leadership of Prof. Jose-Maria Moreno Jimenez. Among the many thematic tracks that make up the GDN conference, the track Preference Modeling for Group Decision and Negotiation has been held annually since 2015, organized by Prof. Danielle Costa Morais from the Federal University of Pernambuco in Recife (Brazil) and Prof. Tomasz Wachowicz from the University of Economics in Katowice (Poland).
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The Department of Operations Research at the University of Economics in Katowice is organizing the XV National Scientific Conference on Preference Modeling and Risk, which will take place on April 7–8, 2025. For years, this conference has provided an interdisciplinary forum for the exchange of ideas and experiences regarding the latest achievements in the mathematical description and modeling of decision-making processes, with a particular focus on risk.
The Preference Modeling and Risk Conference is accompanied by the international scientific event International Workshop on Multiple Criteria Decision Making, dedicated to the theory and applications of multiple criteria decision-making. The concurrent organization of these two events allows participants to freely attend any thematic sessions of their choice.
In 2025, the conference will be held in Katowice at the University of Economics. On behalf of the chairs of the scientific committee, Prof. Tadeusz Trzaskalik and Prof. Tomasz Wachowicz, we warmly invite you to join us in Katowice in April 2025.
For more information about the conference, please visit: https://mpar.ue.katowice.pl/ and https://iwomcdm.ue.katowice.pl/
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Between June 15 and 18, 2025, the XXV International Conference on Group Decision and Negotiation, organized by INFORMS GDN, will take place in Zaragoza, Spain. The conference focuses on group decision-making and negotiation and serves as a forum for the exchange of ideas among professionals in this field, bringing together researchers and practitioners from all over the world.
For the past ten years, the thematic stream Preference Modeling for Group Decision and Negotiation, chaired by Prof. Danielle Morais Costa (UFPE, Recife, Brazil) and Prof. Tomasz Wachowicz (University of Economics in Katowice, Poland), has been a part of the conference. This track gathers a scientific community conducting research on the use of formal decision-support methods for preference analysis and for organizing and facilitating multi-person decision problems.
We cordially invite you to submit your contributions to the conference and to this thematic track. This year, submissions may take the form of full papers, extended abstracts, or posters.
The Call for Papers for the PMfGDN track can be downloaded via the following link: CFP_GDN_PMfGDN_2025.pdf
More information about the conference and the track can be found on the conference website: https://gdnconference.org/gdn2025/
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The conference "Group Decision and Negotiation," organized in a hybrid format by the University of Tokyo from June 11th to June 15th this year, allowed the entire GDN community to meet in person, traditionally within the university's walls, after a two-year break due to the COVID pandemics. A significant group of scientists and researchers from Poland, including members of the N.EA. team participated in the GDN conference. As part of the thematic stream "Preference modeling and decision support in GDN," which is organized every year by Prof. Danielle Moraise (Federal University of Pernambuco, Recife, Brazil) and Prof. Tomasz Wachowicz (University of Economics in Katowice), three presentations by team members were delivered:
- Tomasz Wachowicz, Ewa Roszkowska, Marzena Filipowicz-Chomko: Using unfolding analysis and MARS approach for generating a scoring system from a group preference information.
- Ewa Roszkowska, Tomasz Wachowicz, Marzena Filipowicz-Chomko: Identifying Decision-Making Style. Do REI-20 and GDMS Measure the Same?
- Tomasz Wachowicz, Marek Czekajski: A group decision-aiding protocol for selecting a post-industrial
cultural tourist product in Czeladź Commune in Poland.
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