PrefLib

The community

We want to thank all who participated in the development of PrefLib. This list may not be exhaustive, but we hope it is. Contact us if you feel unjustly treated.

• Haris Aziz and Omer Lev: who provided great help at the launch of the website, discussing the design of the first version of the website, and troubleshooting it.
• Niclas Boehmer and Nathan Schaar: who contributed a large amount of data, as summarized on this page.
• Dominik Peters: who provided useful feedback, created the amazing new logo, committed some code, and contributed the Breakfast dataset.
• Jeffrey O'Neill: maintainer of the website OpenSTV.org. (now OpaVote) who contributed a lot of datasets: irish, Burlington, Glasgow, Aspen, Berkley, Minneapolis, Oakland, Pierce, San Francisco, San Leandro, Takoma Park.
• Robert Bredereck: who contributed the F1 and Skiing, Web Search, and the Web Search Clean datasets.
• Jean-Francois Laslier: who contributed the datasets French Presidental Election, Proto French Election, and its rating counterpart; together with Karine Van der Straeten, and Michel Balinski.
• Andrew Mao: who contributed the Dots, and Puzzle datasets.
• Nicolaus Tideman and Florenz Plassmann: who contributed the ERS dataset.
• Piotr Faliszewski: who contributed the AGH dataset.
• Carleton Coffrin: who contributed the T-Shirt dataset.
• Lihi Dery: who contributed the Social Recommendation dataset.
• Toshihiro Kamishima: who contributed the Sushi dataset.
• Michal Regenwetter and Anna Popova: who contributed the APA dataset.
• Jeremy A. Hansen: who contributed the Vermont District Races dataset.
• Alejandro Rosete Suarez and Milton Garcia Borroto: who contributed the Cujae dataset.
• Ulle Endriss: who contributed the Poster Competition dataset and part of the AAMAS dataset.
• Ioannis Caragiannis: who contributed the Cities Survey dataset.
• John P. Dickerson: who contributed the Kidney dataset.
• Rafael Bordini, Edith Elkind, John Thangarajah, and David Shield: who contributed part of the AAMAS dataset.
• David Manlove: who contributed the Project Bidding dataset.
• Hongning Wang: who contributed the Trip Advisor dataset.
• Martin Lackner: who contributed the Parliamentary Elections dataset.

These Papers are Using PrefLib

Below is a list of papers that have made use of or directly referenced data stored here at PrefLib. The papers have been automatically added from Google Scholar, if there is a problem with a paper or if you want to add one paper, please contact us.

• On the complexity of bribery and manipulation in tournaments with uncertain information. N Mattei, J Goldsmith, A Klapper, M Mundhenk, Journal of Applied Logic (2015).
• Online fair division: analysing a food bank problem. MD Aleksandrov, H Aziz, S Gaspers, T Walsh, Proceedings of the International Joint Conference on Artificial Intelligence (2015).
• Pnyx: a powerful and user-friendly tool for preference aggregation. F Brandt, G Chabin, C Geist, Proceedings of the International Conference on Autonomous Agents and Multiagent Systems (2015).
• Privacy in Elections: k-Anonymizing Preference Orders. N Talmon, International Symposium on Fundamentals of Computation Theory (2015).
• Realistic assumptions for attacks on elections. Z Fitzsimmons, Proceedings of the AAAI Conference on Artificial Intelligence (2015).
• The complexity of recognizing incomplete single-crossing preferences. E Elkind, P Faliszewski, M Lackner et al., Proceedings of the AAAI Conference on Artificial Intelligence (2015).
• What do we elect committees for? A voting committee model for multi-winner rules. PK Skowron, Proceedings of the International Joint Conference on Artificial Intelligence (2015).
• Who is watching you eat? a noir preferences thriller. J Goldsmith, N Mattei, RH Sloan, AI Matters (2015).
• Approximate winner selection in social choice with partial preferences. JA Doucette, K Larson, R Cohen, Workshop on Exploring Beyond the Worst Case in Computational Social Choice (2014).
• Computational aspects of multi-winner approval voting. H Aziz, S Gaspers, J Gudmundsson et al., Workshops at the AAAI Conference on Artificial Intelligence (2014).
• Controlling elections by replacing candidates: Theoretical and experimental results. A Loreggia, N Narodytska, F Rossi, KB Venable et al., Workshops at the AAAI Conference on Artificial Intelligence (2014).
• Counting, ranking, and randomly generating CP-nets. TE Allen, J Goldsmith, N Mattei, Workshops at the AAAI Conference on Artificial Intelligence (2014).
• Election attacks with few candidates. Y Yang, arXiv preprint (2014).
• From Sentiment Analysis to Preference Aggregation.. U Grandi, A Loreggia, F Rossi, VA Saraswat, ISAIM (2014).
• Incomplete preferences in single-peaked electorates. M Lackner, Proceedings of the AAAI Conference on Artificial Intelligence (2014).

Even more references, papers, and tutorials can be found in the proceedings of the EXPLORE Workshops:

• EXPLORE 2017 - Brazil
• EXPLORE 2016 - Singapore
• EXPLORE 2015 - Istanbul
• EXPLORE 2014 - Paris

Some Tools to Work with Preferences

Empirical experiments with real data are becoming a more fundamental part of work in computational social choice. In addition to a lightweight set of tools for working with data from PrefLib we also host documentation for several of these project. Please contact Nick if you have code that you would like to share with the community.

Iterative Voting Simulator

This is a voting simulator built for the paper A Local-Dominance Theory of Voting Equilibria. We are releasing its source code to be expanded and enhanced by the community. However, it is quite versatile in its current construction, and can be used for various simulations "as is".

Learn more.

Kidney Dataset Generator

Kidney failure is a life-threatening health issue that affects hundreds of thousands of people worldwide. In the US alone, the waitlist for a kidney transplant has over 100,000 patients. This list is growing: demand far outstrips supply.This codebase includes: structural elements of kidney exchange like "pools", "hospitals", and "pairs", a couple of kidney exchange graph generators, a couple of kidney exchange solvers (max weight, failure-aware, fairness-aware, individually rational), and a dynamic kidney exchange simulator.

Learn more.

CRISNER: A Qualitative Preference Reasoner for CP-nets, TCP-nets, CP-Theories

CRISNER stands for Conditional and Relative Importance Statement Network PrEference Reasoner. It can reason about ceteris paribus preference languages such as CP-nets, TCP-nets and CP-theories. Given a preference specification (a set of preference statements) in one of these languages, CRISNER succinctly encodes its induced preference graph (IPG) into a Kripke structure model in the language of the NuSMV model checker. This Kripke model is reachability-equivalent to the induced preference graph. CRISNER generates the model only once, and then translates each query posed against this preference specification into a temporal logic formula in computation-tree temporal logic (CTL) such that the formula is verified in the Kripke model if and only if the query holds true according to the ceteris paribus semantics of the preference language. The model checker either affirms the query or returns with a counterexample. For answering queries related to equivalence and subsumption checking of two sets of preferences, CRISNER constructs a combined IPG and uses temporal queries in CTL to identify whether every dominance that holds in one also holds in the other, and vice-versa.

Learn more.