{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:XECCOX2MDDBDG2DTLXQJQC53RX","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"5d3a4a738722c36e30015c6da7041df7b129bab999157de8507943e106bc5001","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2019-07-31T02:23:52Z","title_canon_sha256":"c00faaecf2dd6487fc8467357768e6f73419136faee8a7ffba8a2810b25b2f43"},"schema_version":"1.0","source":{"id":"1907.13286","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.13286","created_at":"2026-07-05T00:05:45Z"},{"alias_kind":"arxiv_version","alias_value":"1907.13286v3","created_at":"2026-07-05T00:05:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.13286","created_at":"2026-07-05T00:05:45Z"},{"alias_kind":"pith_short_12","alias_value":"XECCOX2MDDBD","created_at":"2026-07-05T00:05:45Z"},{"alias_kind":"pith_short_16","alias_value":"XECCOX2MDDBDG2DT","created_at":"2026-07-05T00:05:45Z"},{"alias_kind":"pith_short_8","alias_value":"XECCOX2M","created_at":"2026-07-05T00:05:45Z"}],"graph_snapshots":[{"event_id":"sha256:4d1a07f34bbf5a1697ac8741e103046afd7074eb63ad3fd086bae9de7cedba83","target":"graph","created_at":"2026-07-05T00:05:45Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1907.13286/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Recommender systems are known to suffer from the popularity bias problem: popular (i.e. frequently rated) items get a lot of exposure while less popular ones are under-represented in the recommendations. Research in this area has been mainly focusing on finding ways to tackle this issue by increasing the number of recommended long-tail items or otherwise the overall catalog coverage. In this paper, however, we look at this problem from the users' perspective: we want to see how popularity bias causes the recommendations to deviate from what the user expects to get from the recommender system. ","authors_text":"Bamshad Mobasher, Himan Abdollahpouri, Masoud Mansoury, Robin Burke","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2019-07-31T02:23:52Z","title":"The Unfairness of Popularity Bias in Recommendation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.13286","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:7ed974fdc31965af1ac5d5b4b4e7c9cd686965e63b10cbe71b47e1ba4a35892d","target":"record","created_at":"2026-07-05T00:05:45Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"5d3a4a738722c36e30015c6da7041df7b129bab999157de8507943e106bc5001","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IR","submitted_at":"2019-07-31T02:23:52Z","title_canon_sha256":"c00faaecf2dd6487fc8467357768e6f73419136faee8a7ffba8a2810b25b2f43"},"schema_version":"1.0","source":{"id":"1907.13286","kind":"arxiv","version":3}},"canonical_sha256":"b904275f4c18c23368735de0980bbb8decf0bd60a714f167bbfc98cea6825fc0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b904275f4c18c23368735de0980bbb8decf0bd60a714f167bbfc98cea6825fc0","first_computed_at":"2026-07-05T00:05:45.767778Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:05:45.767778Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jWCBbOimEe0X1ESGHJy/NtyQTAodWsTaLEbR787YHPvtO7ITcgKBcdAl4Gm5VkAvBGALXs3aMRiCQhGosxpcCw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:05:45.768283Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.13286","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7ed974fdc31965af1ac5d5b4b4e7c9cd686965e63b10cbe71b47e1ba4a35892d","sha256:4d1a07f34bbf5a1697ac8741e103046afd7074eb63ad3fd086bae9de7cedba83"],"state_sha256":"946c23fa0cc9f986cffc90b743ecb6cc5dcc7b87a8b9216afe8bda19a9d64207"}