{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:ZKJRWUWKBJOJSICTSZQVXI5E62","short_pith_number":"pith:ZKJRWUWK","canonical_record":{"source":{"id":"1907.04740","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.GT","submitted_at":"2019-07-10T14:12:41Z","cross_cats_sorted":["cs.MA"],"title_canon_sha256":"cf826b3a99c96b0a7626c90440b96938c19d4d8f1754c99533df62be009d940a","abstract_canon_sha256":"2639c10e0305472997ee3f4f2f33da9b44ec916c222c81121cbbe4bedb4ec895"},"schema_version":"1.0"},"canonical_sha256":"ca931b52ca0a5c99205396615ba3a4f6b37aa04f2f60aa1d21730bc1705521bc","source":{"kind":"arxiv","id":"1907.04740","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.04740","created_at":"2026-05-17T23:40:56Z"},{"alias_kind":"arxiv_version","alias_value":"1907.04740v1","created_at":"2026-05-17T23:40:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.04740","created_at":"2026-05-17T23:40:56Z"},{"alias_kind":"pith_short_12","alias_value":"ZKJRWUWKBJOJ","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"ZKJRWUWKBJOJSICT","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"ZKJRWUWK","created_at":"2026-05-18T12:33:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:ZKJRWUWKBJOJSICTSZQVXI5E62","target":"record","payload":{"canonical_record":{"source":{"id":"1907.04740","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.GT","submitted_at":"2019-07-10T14:12:41Z","cross_cats_sorted":["cs.MA"],"title_canon_sha256":"cf826b3a99c96b0a7626c90440b96938c19d4d8f1754c99533df62be009d940a","abstract_canon_sha256":"2639c10e0305472997ee3f4f2f33da9b44ec916c222c81121cbbe4bedb4ec895"},"schema_version":"1.0"},"canonical_sha256":"ca931b52ca0a5c99205396615ba3a4f6b37aa04f2f60aa1d21730bc1705521bc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:40:56.918864Z","signature_b64":"KNKWr031X/Yb+sy7ZPlb2jz1TbLhVjFA1cyNXEg4EREelNB+XN9krieZAwu4b6xEccojMzyuUgMOjto4Th29Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ca931b52ca0a5c99205396615ba3a4f6b37aa04f2f60aa1d21730bc1705521bc","last_reissued_at":"2026-05-17T23:40:56.918145Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:40:56.918145Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.04740","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:40:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3q6y4FGGiKlyUtRbY/sFd9MElxm7R447WXDk+WcNwLDpWlPi0eZnpKDU4GNIqNirlZxqet/elIos9lx43FUnCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T22:40:25.297147Z"},"content_sha256":"cb246449ac931cab99d26b2e17ed33cfaf843cd90a125e903f718415c09b3956","schema_version":"1.0","event_id":"sha256:cb246449ac931cab99d26b2e17ed33cfaf843cd90a125e903f718415c09b3956"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:ZKJRWUWKBJOJSICTSZQVXI5E62","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimal mechanisms with budget for user generated contents","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["cs.MA"],"primary_cat":"cs.GT","authors_text":"Mengjing Chen, Pingzhong Tang, Shenke Xiao, Xiwang Yang, Zihe Wang","submitted_at":"2019-07-10T14:12:41Z","abstract_excerpt":"In this paper, we design gross product maximization mechanisms which incentivize users to upload high-quality contents on user-generated-content (UGC) websites. We show that, the proportional division mechanism, which is widely used in practice, can perform arbitrarily bad in the worst case. The problem can be formulated using a linear program with bounded and increasing variables. We then present an $O(n\\log n)$ algorithm to find the optimal mechanism, where n is the number of players."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.04740","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:40:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FNwvI7dBRgk52IrfdnWMhXVigVN554BDNdN338f1gyID6U6C5eIg1wuXQsZZ5YpXa38igeCQDO9DZczgJhoNDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T22:40:25.297844Z"},"content_sha256":"2afaaaa473e6005424df8353ea2ff9dc4523032ca051c84a45434a04176ccf03","schema_version":"1.0","event_id":"sha256:2afaaaa473e6005424df8353ea2ff9dc4523032ca051c84a45434a04176ccf03"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZKJRWUWKBJOJSICTSZQVXI5E62/bundle.json","state_url":"https://pith.science/pith/ZKJRWUWKBJOJSICTSZQVXI5E62/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZKJRWUWKBJOJSICTSZQVXI5E62/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-18T22:40:25Z","links":{"resolver":"https://pith.science/pith/ZKJRWUWKBJOJSICTSZQVXI5E62","bundle":"https://pith.science/pith/ZKJRWUWKBJOJSICTSZQVXI5E62/bundle.json","state":"https://pith.science/pith/ZKJRWUWKBJOJSICTSZQVXI5E62/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZKJRWUWKBJOJSICTSZQVXI5E62/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:ZKJRWUWKBJOJSICTSZQVXI5E62","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":"2639c10e0305472997ee3f4f2f33da9b44ec916c222c81121cbbe4bedb4ec895","cross_cats_sorted":["cs.MA"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.GT","submitted_at":"2019-07-10T14:12:41Z","title_canon_sha256":"cf826b3a99c96b0a7626c90440b96938c19d4d8f1754c99533df62be009d940a"},"schema_version":"1.0","source":{"id":"1907.04740","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.04740","created_at":"2026-05-17T23:40:56Z"},{"alias_kind":"arxiv_version","alias_value":"1907.04740v1","created_at":"2026-05-17T23:40:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.04740","created_at":"2026-05-17T23:40:56Z"},{"alias_kind":"pith_short_12","alias_value":"ZKJRWUWKBJOJ","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"ZKJRWUWKBJOJSICT","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"ZKJRWUWK","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:2afaaaa473e6005424df8353ea2ff9dc4523032ca051c84a45434a04176ccf03","target":"graph","created_at":"2026-05-17T23:40:56Z","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"},"paper":{"abstract_excerpt":"In this paper, we design gross product maximization mechanisms which incentivize users to upload high-quality contents on user-generated-content (UGC) websites. We show that, the proportional division mechanism, which is widely used in practice, can perform arbitrarily bad in the worst case. The problem can be formulated using a linear program with bounded and increasing variables. We then present an $O(n\\log n)$ algorithm to find the optimal mechanism, where n is the number of players.","authors_text":"Mengjing Chen, Pingzhong Tang, Shenke Xiao, Xiwang Yang, Zihe Wang","cross_cats":["cs.MA"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.GT","submitted_at":"2019-07-10T14:12:41Z","title":"Optimal mechanisms with budget for user generated contents"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.04740","kind":"arxiv","version":1},"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:cb246449ac931cab99d26b2e17ed33cfaf843cd90a125e903f718415c09b3956","target":"record","created_at":"2026-05-17T23:40:56Z","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":"2639c10e0305472997ee3f4f2f33da9b44ec916c222c81121cbbe4bedb4ec895","cross_cats_sorted":["cs.MA"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.GT","submitted_at":"2019-07-10T14:12:41Z","title_canon_sha256":"cf826b3a99c96b0a7626c90440b96938c19d4d8f1754c99533df62be009d940a"},"schema_version":"1.0","source":{"id":"1907.04740","kind":"arxiv","version":1}},"canonical_sha256":"ca931b52ca0a5c99205396615ba3a4f6b37aa04f2f60aa1d21730bc1705521bc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ca931b52ca0a5c99205396615ba3a4f6b37aa04f2f60aa1d21730bc1705521bc","first_computed_at":"2026-05-17T23:40:56.918145Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:40:56.918145Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KNKWr031X/Yb+sy7ZPlb2jz1TbLhVjFA1cyNXEg4EREelNB+XN9krieZAwu4b6xEccojMzyuUgMOjto4Th29Bg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:40:56.918864Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.04740","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cb246449ac931cab99d26b2e17ed33cfaf843cd90a125e903f718415c09b3956","sha256:2afaaaa473e6005424df8353ea2ff9dc4523032ca051c84a45434a04176ccf03"],"state_sha256":"2c5238f8dbf5d9f18da20ab3915ed1194117cac0deb790a556e534f7da30e9e6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EWd2iktlE4Iwvjg/Fgt/GRkmmjNDAOke4h5lYQcDEC9ULl/NRVt4sUQ6ufCYKDZAHXlPt8Tezp+HC7Y+6lzEAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-18T22:40:25.300051Z","bundle_sha256":"173d5acc9f56b85f0459f0b16940143a7046b47c1dab83f297cb1c00c8a00380"}}