Patrick Lederer wins Exemplary Paper Award at ACM Conference on Economics and Computation 2026

We are pleased to announce that Patrick Lederer, postdoc in the Computational Social Choice Group at the ILLC, received an Exemplary Paper Award at the 27th ACM Conference on Economics and Computation (EC'26), which took place in Rome this July.

The paper receiving the award studies the problem of guaranteeing proportional representation in rank aggregation using the methods of social choice theory. This problem arises, for instance, when you want to aggregate several rankings of hotels based on, say, price, location, and cleanliness into a single overall ranking that adequately accounts for the importance you ascribe to each of these criteria. Thus, for instance, if you are looking for an overall ranking that is to 50% based on price, to 30% on location, and to 20% on cleanliness, then the overall ranking should agree with the price ranking on at least 50% of all pairs of hotels (and accordingly for location and cleanliness). In his paper, Patrick showed that existing methods of aggregation do not satisfy this seemingly simple requirement and designed new methods that do. The paper is available at https://arxiv.org/abs/2508.16177.