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Deep Ensembles for Graphs with Higher-order Dependencies

ICLR 2023 · Graph learning › GNN architectures · approach: GNN generalization theory · 1 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Sample higher-order relatives and ensemble their predictions with independent GNNsDGE-bag · Node classification across six datasetsmicro F1: DGE-bag outperformed all other methods on five data sets and was second to DGE-pool* on AirHelped
Sample higher-order relatives and ensemble their predictions with independent GNNsDGE-bag · Link prediction across five datasetsAUPRCMixed
Use separate parameters for each base GNN instead of sharing them (ablation)DGE-bag · Node classification across datasetsmicro F1Helped
Use separate parameters for each base GNN instead of sharing them (ablation)DGE-bag · Link prediction across datasetsAUPRCHelped
Use relative sampling and pooling rather than training the ensemble on the first-order graph alone (ablation)DGE-bag · Node classification across four reported datasetsmicro F1Helped
Concatenate relative representations instead of averaging their class probabilities (ablation)DGE · Node classification across datasetsmicro F1Hurt
Replace independent base learners with shared parameters (ablation)DGE · Node classification across datasetsmicro F1Hurt
Use shared-parameter pooling (DGE-pool*) (ablation)DGE · Air node classificationmicro F1: 0.856 -> 0.865Helped
Use a single shared-parameter model that resamples relatives per batch (DGE-batch*) (ablation)DGE · Node classification across datasetsmicro F1Hurt
Pool sampled-relative representations using attention (ablation)DGE · Node classificationmicro F1Hurt
Increase model depth for DGE-bag (ablation)DGE-bag · Node classification across datasetstest lossMixed

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