GNNRank: Learning Global Rankings from Pairwise Comparisons via Directed Graph Neural Networks

• URL: http://arxiv.org/abs/2202.00211v1
• Date: Tue, 1 Feb 2022 04:19:50 GMT
• Title: GNNRank: Learning Global Rankings from Pairwise Comparisons via Directed Graph Neural Networks
• Authors: Yixuan He and Quan Gan and David Wipf and Gesine Reinert and Junchi Yan and Mihai Cucuringu
• Abstract summary: We introduce GNNRank, a modeling framework compatible with any GNN capable of learning digraph embeddings. We show that our methods attain competitive and often superior performance compared with existing approaches.
• Score: 68.61934077627085
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Recovering global rankings from pairwise comparisons is an important problem with many applications, ranging from time synchronization to sports team ranking. Pairwise comparisons corresponding to matches in a competition can naturally be construed as edges in a directed graph (digraph), whose nodes represent competitors with an unknown rank or skill strength. However, existing methods addressing the rank estimation problem have thus far not utilized powerful neural network architectures to optimize ranking objectives. Hence, we propose to augment an algorithm with neural network, in particular graph neural network (GNN) for its coherence to the problem at hand. In this paper, we introduce GNNRank, a modeling framework that is compatible with any GNN capable of learning digraph embeddings, and we devise trainable objectives to encode ranking upsets/violations. This framework includes a ranking score estimation approach, and adds a useful inductive bias by unfolding the Fiedler vector computation of the graph constructed from a learnable similarity matrix. Experimental results on a wide range of data sets show that our methods attain competitive and often superior performance compared with existing approaches. It also shows promising transfer ability to new data based on the trained GNN model.

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