{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:CCNWEW7LKOSYOGI267AKCYBVAG","short_pith_number":"pith:CCNWEW7L","canonical_record":{"source":{"id":"1307.4980","kind":"arxiv","version":7},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GT","submitted_at":"2013-07-18T15:27:12Z","cross_cats_sorted":["cs.IR"],"title_canon_sha256":"bfc62346d02c53df49b01251599523c07a64a4760bcb21af1d793a437382c02b","abstract_canon_sha256":"dc787fc8268f96ce3267ae16bc0ec1eaf0d4ec25e458df289913bc14e6d24178"},"schema_version":"1.0"},"canonical_sha256":"109b625beb53a587191af7c0a16035018cd37dbd46a5f1b31e7dcea16a63c2ce","source":{"kind":"arxiv","id":"1307.4980","version":7},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.4980","created_at":"2026-05-18T01:24:38Z"},{"alias_kind":"arxiv_version","alias_value":"1307.4980v7","created_at":"2026-05-18T01:24:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.4980","created_at":"2026-05-18T01:24:38Z"},{"alias_kind":"pith_short_12","alias_value":"CCNWEW7LKOSY","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"CCNWEW7LKOSYOGI2","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"CCNWEW7L","created_at":"2026-05-18T12:27:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:CCNWEW7LKOSYOGI267AKCYBVAG","target":"record","payload":{"canonical_record":{"source":{"id":"1307.4980","kind":"arxiv","version":7},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GT","submitted_at":"2013-07-18T15:27:12Z","cross_cats_sorted":["cs.IR"],"title_canon_sha256":"bfc62346d02c53df49b01251599523c07a64a4760bcb21af1d793a437382c02b","abstract_canon_sha256":"dc787fc8268f96ce3267ae16bc0ec1eaf0d4ec25e458df289913bc14e6d24178"},"schema_version":"1.0"},"canonical_sha256":"109b625beb53a587191af7c0a16035018cd37dbd46a5f1b31e7dcea16a63c2ce","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:24:38.774764Z","signature_b64":"NNvpWuCiGvkoRjYq0/7zDDj0+EbnY/OLmGtVg3+SWLaZBPYIhbAOg9Z0ByBXw83i5Zi3LlrQ+biaFiocYmAGCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"109b625beb53a587191af7c0a16035018cd37dbd46a5f1b31e7dcea16a63c2ce","last_reissued_at":"2026-05-18T01:24:38.774364Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:24:38.774364Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.4980","source_version":7,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:24:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V2eHj1Zh2tpRjS8ilwN0gCN1AwnKtxitFI91YZQ7x9DuJe5x4v5iN91uhMLvqZLd1j0L2qi4haUFWYRScrFJDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T05:35:34.559602Z"},"content_sha256":"e6b905b5ba8eaab6229b9fd8e72f66fef10f6f3dd51a5c227d9b9ce1cb8c5ea8","schema_version":"1.0","event_id":"sha256:e6b905b5ba8eaab6229b9fd8e72f66fef10f6f3dd51a5c227d9b9ce1cb8c5ea8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:CCNWEW7LKOSYOGI267AKCYBVAG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Multi-keyword multi-click advertisement option contracts for sponsored search","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.IR"],"primary_cat":"cs.GT","authors_text":"Bowei Chen, Ingemar J. Cox, Jun Wang, Mohan S. Kankanhalli","submitted_at":"2013-07-18T15:27:12Z","abstract_excerpt":"In sponsored search, advertisement (abbreviated ad) slots are usually sold by a search engine to an advertiser through an auction mechanism in which advertisers bid on keywords. In theory, auction mechanisms have many desirable economic properties. However, keyword auctions have a number of limitations including: the uncertainty in payment prices for advertisers; the volatility in the search engine's revenue; and the weak loyalty between advertiser and search engine. In this paper we propose a special ad option that alleviates these problems. In our proposal, an advertiser can purchase an opti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.4980","kind":"arxiv","version":7},"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":"2026-05-18T01:24:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"egGH9skA/eMfJythiEeBIOmNeh+IQjJTx9tneuhECTjJ2q771NMgMQkdCEb2BrZ/LbPP6SnDDsK1OFBI8PF8CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T05:35:34.560185Z"},"content_sha256":"3243656bd1b50c29fcfaefc20aea3cd133b45f525f1f8606fceecd333faf89ef","schema_version":"1.0","event_id":"sha256:3243656bd1b50c29fcfaefc20aea3cd133b45f525f1f8606fceecd333faf89ef"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CCNWEW7LKOSYOGI267AKCYBVAG/bundle.json","state_url":"https://pith.science/pith/CCNWEW7LKOSYOGI267AKCYBVAG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CCNWEW7LKOSYOGI267AKCYBVAG/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":"2026-05-27T05:35:34Z","links":{"resolver":"https://pith.science/pith/CCNWEW7LKOSYOGI267AKCYBVAG","bundle":"https://pith.science/pith/CCNWEW7LKOSYOGI267AKCYBVAG/bundle.json","state":"https://pith.science/pith/CCNWEW7LKOSYOGI267AKCYBVAG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CCNWEW7LKOSYOGI267AKCYBVAG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:CCNWEW7LKOSYOGI267AKCYBVAG","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":"dc787fc8268f96ce3267ae16bc0ec1eaf0d4ec25e458df289913bc14e6d24178","cross_cats_sorted":["cs.IR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GT","submitted_at":"2013-07-18T15:27:12Z","title_canon_sha256":"bfc62346d02c53df49b01251599523c07a64a4760bcb21af1d793a437382c02b"},"schema_version":"1.0","source":{"id":"1307.4980","kind":"arxiv","version":7}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.4980","created_at":"2026-05-18T01:24:38Z"},{"alias_kind":"arxiv_version","alias_value":"1307.4980v7","created_at":"2026-05-18T01:24:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.4980","created_at":"2026-05-18T01:24:38Z"},{"alias_kind":"pith_short_12","alias_value":"CCNWEW7LKOSY","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"CCNWEW7LKOSYOGI2","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"CCNWEW7L","created_at":"2026-05-18T12:27:40Z"}],"graph_snapshots":[{"event_id":"sha256:3243656bd1b50c29fcfaefc20aea3cd133b45f525f1f8606fceecd333faf89ef","target":"graph","created_at":"2026-05-18T01:24:38Z","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 sponsored search, advertisement (abbreviated ad) slots are usually sold by a search engine to an advertiser through an auction mechanism in which advertisers bid on keywords. In theory, auction mechanisms have many desirable economic properties. However, keyword auctions have a number of limitations including: the uncertainty in payment prices for advertisers; the volatility in the search engine's revenue; and the weak loyalty between advertiser and search engine. In this paper we propose a special ad option that alleviates these problems. In our proposal, an advertiser can purchase an opti","authors_text":"Bowei Chen, Ingemar J. Cox, Jun Wang, Mohan S. Kankanhalli","cross_cats":["cs.IR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GT","submitted_at":"2013-07-18T15:27:12Z","title":"Multi-keyword multi-click advertisement option contracts for sponsored search"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.4980","kind":"arxiv","version":7},"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:e6b905b5ba8eaab6229b9fd8e72f66fef10f6f3dd51a5c227d9b9ce1cb8c5ea8","target":"record","created_at":"2026-05-18T01:24:38Z","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":"dc787fc8268f96ce3267ae16bc0ec1eaf0d4ec25e458df289913bc14e6d24178","cross_cats_sorted":["cs.IR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GT","submitted_at":"2013-07-18T15:27:12Z","title_canon_sha256":"bfc62346d02c53df49b01251599523c07a64a4760bcb21af1d793a437382c02b"},"schema_version":"1.0","source":{"id":"1307.4980","kind":"arxiv","version":7}},"canonical_sha256":"109b625beb53a587191af7c0a16035018cd37dbd46a5f1b31e7dcea16a63c2ce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"109b625beb53a587191af7c0a16035018cd37dbd46a5f1b31e7dcea16a63c2ce","first_computed_at":"2026-05-18T01:24:38.774364Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:24:38.774364Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NNvpWuCiGvkoRjYq0/7zDDj0+EbnY/OLmGtVg3+SWLaZBPYIhbAOg9Z0ByBXw83i5Zi3LlrQ+biaFiocYmAGCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:24:38.774764Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.4980","source_kind":"arxiv","source_version":7}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e6b905b5ba8eaab6229b9fd8e72f66fef10f6f3dd51a5c227d9b9ce1cb8c5ea8","sha256:3243656bd1b50c29fcfaefc20aea3cd133b45f525f1f8606fceecd333faf89ef"],"state_sha256":"0e0b8cf48c1456a527488ad1e342d2933d72ebd76b934b64c28daf9d41576a36"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SjEkfNfSHVsbIMvotaj9hAe0pBlbn7k5NOdIL49y053ID5woT4wWoawfu6gh6KTd5AVQDCqz6MmQxN6Sghq4CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T05:35:34.563772Z","bundle_sha256":"7cae93baaee3fe92f9996b721246cf99a736b0f50fbc637d994673e39b3472c0"}}