{"url":"/dataset/epinion","name":"Epinion","full_name":null,"description_markdown":"The **Epinion**s dataset is trust network dataset. For each user, it contains his profile, his ratings and his trust relations. For each rating, it has the product name and its category, the rating score, the time point when the rating is created, and the helpfulness of this rating.\n\nSource: [https://www.cse.msu.edu/~tangjili/datasetcode/truststudy.htm](https://www.cse.msu.edu/~tangjili/datasetcode/truststudy.htm)","description_withheld":null,"homepage":"https://www.cse.msu.edu/~tangjili/datasetcode/truststudy.htm","introduced_date":"2012-01-01","introduced_date_note":null,"introduced_by":{"paper":null,"title":"eTrust: understanding trust evolution in an online world","first_author":null,"url":"https://doi.org/10.1145/2339530.2339574"},"license":null,"modalities":[],"tasks":[{"name":"Recommendation Systems","url":"/task/recommendation-systems","datasets_with_task":"/datasets/task/recommendation-systems"},{"name":"Outlier Detection","url":"/task/outlier-detection","datasets_with_task":"/datasets/task/outlier-detection"},{"name":"Change Point Detection","url":"/task/change-point-detection","datasets_with_task":"/datasets/task/change-point-detection"}],"languages":[{"name":"English","url":"/datasets/language/english"}],"variants":["Epinions-Extend","Epinion"],"data_loaders":[],"num_papers_in_archive":5,"source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28"},"benchmarks":[{"leaderboard":"/sota/recommendation-systems-on-epinions-extend","task":"Recommendation Systems","dataset_variant":"Epinions-Extend","rows":1,"metrics":["Recall@10","mAP@10"],"first_row_in_archive_order":{"model":"RANK-CSE","paper":"/paper/collaborative-similarity-embedding-for","metrics":{"Recall@10":"0.1767","mAP@10":"0.0921"},"code_links":[{"title":"cnclabs/smore","url":"https://github.com/cnclabs/smore"},{"title":"bdnf/SBX-Recommendation-Engine","url":"https://github.com/bdnf/SBX-Recommendation-Engine"}]},"note":"rows are the archive's own order at snapshot; nothing here re-ranks them"}],"papers_with_a_benchmark_row":[{"paper":"/paper/collaborative-similarity-embedding-for","title":"Collaborative Similarity Embedding for Recommender Systems","date":"2019-02-17","rows_on_this_dataset":1,"code_links":2,"syntology":null}],"syntology_totals":{"read_at":"2026-09-24T18:15:14+00:00","papers_with_samples":0,"samples_harvested":0,"samples_ran":0,"samples_unverified":0,"pointer_only_for_licence":0,"papers_with_no_sample_that_ran":0,"note":"the per-paper counts above, summed; not a rate"},"papers_note":"The archive never published its papers-using-dataset list; these are papers with a leaderboard row on this dataset's benchmarks."}