COMSOC 2025 is the 10th workshop in the interdisciplinary workshop series on Computational Social Choice. It will take place at the TU Wien, Vienna, Austria, from 17-19 September 2025.

We welcome not only researchers and professionals but also students, newcomers, and individuals interested in the fields of Economics, Political & Social Sciences, and Computer Science. Our goal is to create a platform for both seasoned experts and those new to the field to engage in meaningful discussions on the role of social choice and collective decision-making, and to explore how these concepts extend beyond political elections and into everyday life.

List of Topics

Topics under consideration include, but are not limited to:

• Voting and collective decision-making
  • Axiomatic properties
  • Manipulation, control, and bribery
  • Voting equilibria and dynamics
  • Delegation, proxy voting, and liquid democracy
  • Multi-winner election and participatory budgeting
• Preference representation and elicitation
• Opinion diffusion and aggregation on social networks
• Judgement aggregation, belief aggregation, and epistemic voting
• Fair division, allocation, and matching
• Coalition formation
• Recommendation systems

Invited Speakers

• Moon Duchin (Cornell University)

  

  Bio: Moon Duchin is Professor of Mathematics at Cornell university. She is a member of the faculty at the Brooks School and the Department of Mathematics, affiliated with the Center for Data Science for Enterprise and Society. Duchin was hired as part of the Provost Office’s Radical Collaboration initiative.

  A prominent voice on fair redistricting, Duchin has developed mathematical models to analyze the potential and actual outcomes of changes to policy and voting districts. She has served as an expert in redistricting litigation in Wisconsin, North Carolina, Alabama, South Carolina, Pennsylvania, Texas, and Georgia. Recently, her work has turned to the study of alternative systems of election.

  Her research has been recognized with a National Science Foundation Faculty Early Career Development Award (NSF CAREER), a Guggenheim Fellowship, and a Radcliffe Fellowship. She was a Sloan Professor at the Simons-Laufer Mathematical Sciences Research Institute (SLMath) for their recent program on Algorithms, Fairness, and Equity. She is a fellow of the American Mathematical Society.

• Kurt Mehlhorn (Saarland University)

  

  Bio: Kurt Mehlhorn is Professor of Computer Science at Saarland University. He has been a vice president of the Max Planck Society and is director of the Max Planck Institute for Computer Science.

  Mehlhorn has been an important figure in the development of algorithm engineering and is one of the developers of LEDA, the Library of Efficient Data types and Algorithms. He has received several prizes (Gottfried Wilhelm Leibniz Award, EATCS Award, ACM Paris Kanellakis Theory and Practice Award, Erasmus Medal of the Academia Europaea) for his work. He holds Honorary Doctorate Degrees from Magdeburg, Waterloo, Aarhus and Gothenburg universities and is an ACM Fellow. He is a member of the German Academy of Sciences Leopoldina, Academia Europaea, the German Academy of Science and Engineering acatech, the US Academy of Engineering, and the US Academy of Science.

  Mehlhorn is the author of six books and over 300 scientific publications, which include fundamental contributions to data structures, computational geometry, computer algebra, parallel computing, VLSI design, computational complexity, combinatorial optimization, graph algorithms, and fair allocation.

• Axel Ockenfels (University of Cologne)

  

  Bio: Axel Ockenfels is Professor of Economics at the University of Cologne and Director at the Max Planck Institute for Research on Collective Goods in Bonn. He is also Director of the Cologne Laboratory of Economic Research (CLER), and Principal Investigator in the Center for Social and Economic Behavior (C-SEB) and the Excellence Cluster ECONtribute. He held visiting positions at Penn State, Harvard University, Stanford University, and UC San Diego.

  Ockenfels' research focuses on behavioral economic engineering, which combines research in game theory and behavioral research to design markets, algorithms and competitive strategies.

  Ockenfels is a member of the German National Academy of Sciences Leopoldina, the Berlin-Brandenburg Academy of Sciences and Humanities, the North Rhine-Westphalian Academy of Sciences, Humanities and the Arts, and of the National Academy of Science and Engineering acatech. He is also member of the Economists' Roundtable and of the Climate Economists' Roundtable at the Federal Chancellery (Bundeskanzleramt), of the Academic Advisory Board at the Federal Ministry for Economic Affairs and Climate Action (BMWK) and of the Specialist Group for Regulatory Issues at the Federal Network Agency (Bundesnetzagentur). He has received several prizes (Gottfried Wilhelm Leibniz Award, Gossen Prize of the German Economic Association, Zukunftspreis of the University of Cologne, and the Exeter Prize) for his work.

Poster

TBA