Reviews: Hierarchical Optimal Transport for Document Representation

Originality: The authors clearly distinguish their work from previous efforts in the related work section. TMD seems to be the most similar work, at least thematically, but was not included as a baseline. Quality: The results and proofs are thorough. Classification is run on a variety of datasets against reasonable baselines. The classification performance numbers are supplemented with sensitivity analysis, runtime information, and two additional tasks (t-SNE visualizations and link prediction).