2019

Umberto Grandi. Agent-Mediated Social Choice. In The Future of Economic Design, Laslier, Moulin, Sanver, Zwicker (editors). Springer. ArXiv version.

Grzegorz Lisowski, Sylvie Doutre and Umberto Grandi. Aggregation in Value-Based Argumentation Frameworks. In Proceedings of the 17th Conference on Theoretical Aspects of Rationality and Knowledge (TARK), 2019. (pdf)

Francesco Belardinelli and Umberto Grandi. Social-Choice Methods for Database Aggregation. In Proceedings of the 17th Conference on Theoretical Aspects of Rationality and Knowledge (TARK), 2019. (pdf, short paper at AAMAS-2019)

Umberto Grandi, Daniel Hughes, Francesca Rossi, and Arkadii Slinko. Gibbard-Satterthwaite Games for k-Approval Rules. Mathematical Social Sciences 99: 24-35. (paper, Bibtex)

Umberto Grandi, Davide Grossi, and Paolo Turrini. Negotiable Votes. Journal of Artificial Intelligence Research (JAIR), 64: 895-929. (pdf, BibTex)

Sirin Botan, Umberto Grandi and Laurent Perrussel. Multi-Issue Opinion Diffusion under Constraints. In Proceedings of the 18th International Joint Conference on Autonomous Agents and Multiagent Systems (AAMAS), 2019. (pdf, BibTex) Also presented at EXPLORE-2017 and COMSOC-2018.

Arianna Novaro, Umberto Grandi, Dominique Longin, and Emiliano Lorini. Strategic Majoritarian Voting with Propositional Goals (Extended Abstract). In Proceedings of the 18th International Joint Conference on Autonomous Agents and Multiagent Systems (AAMAS), 2019. (pdf)

2018

Adrian Haret, Arianna Novaro, Umberto Grandi. Preference Aggregation with Incomplete CP-nets. Proceedings of the 16th International Conference on Principles of Knowledge Representation and Reasoning (KR), 2018. (pdf, BibTex)

Arianna Novaro, Umberto Grandi and Andreas Herzig. Judgment Aggregation in Dynamic Logic of Propositional Assignments. Journal of Logic and Computation, 28 (7): 1471-1498. (pdf, BibTex) Also presented at EXPLORE-2017.

Umberto Grandi. Agent-Mediated Social Choice. ArXiv version.

Arianna Novaro, Umberto Grandi, Dominique Longin, and Emiliano Lorini. Goal-Based Collective Decisions: Axiomatics and Computational Complexity. Proceedings of the 27th International Joint Conference on Artificial Intelligence (IJCAI), 2018. Also presented at COMSOC-2018. (pdf, BibTex)

Arianna Novaro, Umberto Grandi, Dominique Longin, and Emiliano Lorini. From Individual Goals to Collective Decisions. Extended abstract in Proceedings of the 17th International Conference in Autonomous Agents and Multiagent Systems (AAMAS-2018), 2018.

Ulle Endriss and Umberto Grandi. Graph Aggregation: Extended Abstract. In Proceedings of the 27th Web Conference (WWW-2018), April 2018. Journal Track Paper. (pdf, BibTex).

Umberto Grandi, James Stewart, and Paolo Turrini. The Complexity of Bribery in Network-Based Rating Systems. In Proceedings of the 32nd AAAI Conference on Artificial Intelligence (AAAI), 2018. (pdf, BibTex). Also presented at COMSOC-2018.

2017

Umberto Grandi. Social Choice on Social Networks. In U. Endriss (editor), Trends in Computational Social Choice, pp. 169-184, AI Access, 2017. (pdf, BibTex, full book)

Francesco Belardinelli, Umberto Grandi, Andreas Herzig, Dominique Longin, Emiliano Lorini, Arianna Novaro and Laurent Perrussel. Relaxing Exclusive Control in Boolean Games. In Proceedings of the Sixteenth conference on Theoretical Aspects of Rationality and Knowledge (TARK). (pdf, BibTex).

Stéphane Airiau, Umberto Grandi and Filipo Studzinski Perotto. Learning Agents for Iterative Voting. In Proceedings of the 5th International Conference on Algorithmic Decision Theory (ADT), 2017. (pdf, BibTex). Also presented at EUMAS-2017.

Umberto Grandi, Emiliano Lorini, Arianna Novaro and Laurent Perrussel. Strategic Disclosure of Opinions on a Social Network. In Proceedings of the 16th International Conference in Autonomous Agents and Multiagent Systems (AAMAS-2017), 2017. (pdf, BibTex)

Ulle Endriss and Umberto Grandi. Graph Aggregation. Artificial Intelligence, 245: 86-114, 2017. (pdf, BibTex)

2016

Umberto Grandi and Paolo Turrini. A Network-Based Rating System and its Resistance to Bribery. In Proceedings of the 25th International Joint Conference on Artificial Intelligence (IJCAI-2016), 2016. (pdf, BibTex, amended and expanded version on Arxiv). Also presented at GAMES-2016.

Markus Brill, Edith Elkind, Ulle Endriss, and Umberto Grandi. Pairwise Diffusion of Preference Rankings in Social Networks. In Proceedings of the 25th International Joint Conference on Artificial Intelligence (IJCAI-2016), 2016. (pdf, BibTex)

Ulle Endriss, Umberto Grandi, Ronald de Haan, and Jérôme Lang. Succinctness of Languages for Judgment Aggregation. In Proceedings of the 15th International Conference on Principles of Knowledge Representation and Reasoning (KR-2016), 2016. (pdf, BibTex)

Umberto Grandi, Emiliano Lorini and Laurent Perrussel. Strategic disclosure of opinions on a social network. Extended abstract in Proceedings of the 15th International Conference in Autonomous Agents and Multiagent Systems (AAMAS-2016), 2016. (Working paper on Arxiv). Also presented at SR-2016 and JIAF-2016.

Umberto Grandi, Andrea Loreggia, Francesca Rossi and Vijay Saraswat. A Borda Count for Collective Sentiment Analysis. Annals of Mathematics and Artificial Intelligence, 77(3), 281-302, 2016. (pdf, BibTex)

2015

Umberto Grandi, Davide Grossi and Paolo Turrini. Equilibrium Refinement through Negotiation in Binary Voting. In Proceedings of the 24th International Joint Conference on Artificial Intelligence (IJCAI-15), 2015. (pdf, BibTex)

Edith Elkind, Umberto Grandi, Francesca Rossi and Arkadii Slinko. Gibbard-Satterthwaite Games. In Proceedings of the 24th International Joint Conference on Artificial Intelligence (IJCAI-15), 2015. (pdf, BibTex)

Umberto Grandi, Emiliano Lorini and Laurent Perrussel. Propositional Opinion Diffusion. In Proceedings of the 14th International Conference in Autonomous Agents and Multiagent Systems (AAMAS-2015), 2015. (pdf, BibTex) [Errata: Theorem 9 is false]

Cristina Cornelio, Umberto Grandi, Judy Goldsmith, Nicholas Mattei, Francesca Rossi and K. Brent Venable. Reasoning with PCP-nets in a Multi-agent Context. In Proceedings of the 14th International Conference in Autonomous Agents and Multiagent Systems (AAMAS-2015), 2015. (pdf, BibTex)

2014

Umberto Grandi, Hang Luo, Nicolas Maudet and Francesca Rossi. Aggregating CP-nets with unfeasible outcomes. In Proceedings of the 20th International Conference on Principles and Practice of Constraint Programming (CP-2014), 2014. (pdf, BibTex)

Ulle Endriss and Umberto Grandi. Collective Rationality in Graph Aggregation. In Proceedings of the 21st European Conference on Artificial Intelligence (ECAI-2014), 2014. (pdf, BibTex)

Ulle Endriss and Umberto Grandi. Binary Aggregation by Selection of the Most Representative Voter. In Proceedings of the 28th AAAI Conference on Artificial Intelligence (AAAI-2014), 2014. (pdf, BibTex)

Umberto Grandi, Davide Grossi and Paolo Turrini. Pre-Vote Negotiations and Binary Voting with Constraints. In Proceedings of the 11th Conference on Logic and the Foundations of Game and Decision Theory (LOFT-2014), 2014. (pdf, BibTex). Also presented at SCW-2014 and COMSOC-2014. A review of our paper appeared in the column "What's hot in logic and rational interaction?" on The Reasoner 8 (5), May 2014. (pdf)

Edith Elkind, Umberto Grandi, Francesca Rossi and Arkadii Slinko. Games Gibbard-Satterthwaite Manipulators Play. In Proceedings of the 5th International Workshop on Computational Social Choice (COMSOC-2014), 2014. (pdf, BibTex). Also presented at SCW-2014.

Cristina Cornelio, Umberto Grandi, Judy Goldsmith, Nicholas Mattei, Francesca Rossi and K. Brent Venable. Voting with CP-nets using a Probabilistic Preference Structure. In Proceedings of the 5th International Workshop on Computational Social Choice (COMSOC-2014), 2014. (pdf, BibTex). Also presented at SCW-2014.

Umberto Grandi, Andrea Loreggia, Francesca Rossi and Vijay Saraswat. From Sentiment Analysis to Preference Aggregation. In Proceedings of the 2014 International Symposium on Artificial Intelligence and Mathematics (ISAIM-2014), 2014. (pdf, BibTex)

2013

Umberto Grandi and Ulle Endriss. First-Order Logic Formalisation of Impossibility Theorems in Preference Aggregation. Journal of Philosophical Logic , 42 (4): 595-618, 2013. (pdf, BibTex)

Umberto Grandi and Ulle Endriss. Lifting Integrity Constraints in Binary Aggregation. Artificial Intelligence. 199-200: 45-66, 2013. (pdf, BibTex)

Umberto Grandi, Andrea Loreggia, Francesca Rossi, Kristen Brent Venable and Toby Walsh. Restricted Manipulation in Iterative Voting: Condorcet Efficiency and Borda Score. In Proceedings of the 3rd International Conference on Algorithmic Decision Theory (ADT-2013), November 2013. (pdf, BibTex)

Ulle Endriss and Umberto Grandi. Binary Aggregation by Selection of the Most Representative Voter. In Proceedings of the 7th Multidisciplinary Workshop on Advances in Preference Handling (MPREF-2013), August 2013. (pdf, BibTex)

Umberto Grandi, Andrea Loreggia, Francesca Rossi, Kristen Brent Venable and Toby Walsh. Restricted Manipulation in Iterative Voting: Condorcet Efficiency and Borda Score. In Proceedings of the 7th Multidisciplinary Workshop on Advances in Preference Handling (MPREF-2013), August 2013. (pdf, BibTex)

Umberto Grandi, Andrea Loreggia, Francesca Rossi, Kristen Brent Venable and Toby Walsh. Restricted Manipulation in Iterative Voting: Convergence and Condorcet Efficiency. In Proceeding of the 1st International Workshop on Strategic Reasoning (SR-2013), 2013. (pdf, BibTex)

2012

Ulle Endriss, Umberto Grandi and Daniele Porello. Complexity of Judgment Aggregation. Journal of Artificial Intelligence Research, 45:481-514, 2012. (pdf, BibTex)

Umberto Grandi. The Common Structure of Paradoxes in Aggregation Theory. In Proceedings of the 4th International Workshop on Computational Social Choice (COMSOC-2012), 2012. (arXiv, pdf, BibTex)

Ulle Endriss and Umberto Grandi. Graph Aggregation. In Proceedings of the 4th International Workshop on Computational Social Choice (COMSOC-2012), 2012. (pdf, BibTex)

Umberto Grandi and Gabriella Pigozzi. On Compatible Multi-issue Group Decisions. In Proceedings of the 10th Conference on Logic and the Foundations of Game and Decision Theory (LOFT-2012), 2012. (pdf, BibTex)

2011

Umberto Grandi and Ulle Endriss. Binary Aggregation with Integrity Constraints. In Proceedings of the 22nd International Joint Conference on Artificial Intelligence (IJCAI-2011), 2011. (pdf,BibTex)

Stephane Airiau, Ulle Endriss, Umberto Grandi, Daniele Porello and Joel Uckelman. Aggregating Dependency Graphs into Voting Agendas in Multi-Issue Elections. In Proceedings of the 22nd International Joint Conference on Artificial Intelligence (IJCAI-2011), 2011. Poster Paper. (pdf,BibTex)

Umberto Grandi. Combinatorial Aggregation. PhD thesis abstract for the Doctoral Consortium of IJCAI-2011. In Proceedings of the 22nd International Joint Conference on Artificial Intelligence (IJCAI-2011), 2011. (pdf,BibTex)

Umberto Grandi and Ulle Endriss. Binary Aggregation with Integrity Constraints. In D. Grossi, S. Minica, B. Rodenhauser, S. Smets (eds.) Logic and Interactive Rationality (LIRA). Yearbook 2010. Institute for Logic, Language and Computation, 2011. (pdf)

2010

Ulle Endriss, Umberto Grandi and Daniele Porello. Complexity of Winner Determination and Strategic Manipulation in Judgment Aggregation. In Proceedings of 3rd International Workshop on Computational Social Choice (COMSOC-2010), 2010. (pdf,BibTex)

Umberto Grandi and Ulle Endriss. Lifting Rationality Assumptions in Binary Aggregation. In Proceedings of the 24th AAAI Conference on Artificial Intelligence (AAAI-2010), 2010. (pdf,BibTex)

Ulle Endriss, Umberto Grandi, and Daniele Porello. Complexity of Judgment Aggregation: Safety of the Agenda. In Proceedings of the 9th International Joint Conference on Autonomous Agents and Multiagent Systems (AAMAS-2010), 2010. (pdf,BibTex)

2009

Umberto Grandi and Ulle Endriss. First-Order Logic Formalisation of Arrow's Theorem. In Proceedings of the 2nd International Workshop on Logic, Rationality and Interaction (LORI-2009), 2009.  (pdf, BibTex)

Umberto Grandi and Ulle Endriss. First-Order Logic Formalisation of Arrow's Theorem. Poster presented at DGL 2009. (pdf)

Dissertations

Umberto Grandi. Binary Aggregation with Integrity Constraints. PhD thesis, ILLC, University of Amsterdam, 2012. (pdf)

Umberto Grandi. Modal Logic and Foundations of Game Theory. Master Thesis at University of Pisa, September 2008. Supervisors: Alessandro Berarducci and Hykel Hosni. (pdf-in italian)

Umberto Grandi. The Logical Completeness of Elementary Geometry and Real Closed Fields. Bachelor Thesis at University of Pisa, September 2006. Supervisor: Mauro Di Nasso. (pdf-in italian)