{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:TJEWFI7DEF3XSDO36RGWF45GL6","short_pith_number":"pith:TJEWFI7D","schema_version":"1.0","canonical_sha256":"9a4962a3e32177790ddbf44d62f3a65f8ad130c57975ccb0f2f4ca8368fd2718","source":{"kind":"arxiv","id":"1301.2954","version":1},"attestation_state":"computed","paper":{"title":"The ranking lasso and its application to sport tournaments","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"stat.AP","authors_text":"Cristiano Varin, Guido Masarotto","submitted_at":"2013-01-14T12:42:13Z","abstract_excerpt":"Ranking a vector of alternatives on the basis of a series of paired comparisons is a relevant topic in many instances. A popular example is ranking contestants in sport tournaments. To this purpose, paired comparison models such as the Bradley-Terry model are often used. This paper suggests fitting paired comparison models with a lasso-type procedure that forces contestants with similar abilities to be classified into the same group. Benefits of the proposed method are easier interpretation of rankings and a significant improvement of the quality of predictions with respect to the standard max"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1301.2954","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2013-01-14T12:42:13Z","cross_cats_sorted":[],"title_canon_sha256":"32db6f2850dbbbdd3d95af71a57524e2e161a7a9434dd7245faaf1d115091a1a","abstract_canon_sha256":"29fac2e7a043e4ac8faba2e1aa573cebda6bf714f5e9fce810960911d62240b3"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:36:27.738775Z","signature_b64":"ONmczvM6maFn5w4QMYaW15kKbAUqJmeefEJ9JKGf3z/xp8FwsuXlThk6Ls0ZU7rWzWPzEYCFncBJwFWqoXRjCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9a4962a3e32177790ddbf44d62f3a65f8ad130c57975ccb0f2f4ca8368fd2718","last_reissued_at":"2026-05-18T03:36:27.738263Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:36:27.738263Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The ranking lasso and its application to sport tournaments","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"stat.AP","authors_text":"Cristiano Varin, Guido Masarotto","submitted_at":"2013-01-14T12:42:13Z","abstract_excerpt":"Ranking a vector of alternatives on the basis of a series of paired comparisons is a relevant topic in many instances. A popular example is ranking contestants in sport tournaments. To this purpose, paired comparison models such as the Bradley-Terry model are often used. This paper suggests fitting paired comparison models with a lasso-type procedure that forces contestants with similar abilities to be classified into the same group. Benefits of the proposed method are easier interpretation of rankings and a significant improvement of the quality of predictions with respect to the standard max"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.2954","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1301.2954","created_at":"2026-05-18T03:36:27.738337+00:00"},{"alias_kind":"arxiv_version","alias_value":"1301.2954v1","created_at":"2026-05-18T03:36:27.738337+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.2954","created_at":"2026-05-18T03:36:27.738337+00:00"},{"alias_kind":"pith_short_12","alias_value":"TJEWFI7DEF3X","created_at":"2026-05-18T12:28:02.375192+00:00"},{"alias_kind":"pith_short_16","alias_value":"TJEWFI7DEF3XSDO3","created_at":"2026-05-18T12:28:02.375192+00:00"},{"alias_kind":"pith_short_8","alias_value":"TJEWFI7D","created_at":"2026-05-18T12:28:02.375192+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/TJEWFI7DEF3XSDO36RGWF45GL6","json":"https://pith.science/pith/TJEWFI7DEF3XSDO36RGWF45GL6.json","graph_json":"https://pith.science/api/pith-number/TJEWFI7DEF3XSDO36RGWF45GL6/graph.json","events_json":"https://pith.science/api/pith-number/TJEWFI7DEF3XSDO36RGWF45GL6/events.json","paper":"https://pith.science/paper/TJEWFI7D"},"agent_actions":{"view_html":"https://pith.science/pith/TJEWFI7DEF3XSDO36RGWF45GL6","download_json":"https://pith.science/pith/TJEWFI7DEF3XSDO36RGWF45GL6.json","view_paper":"https://pith.science/paper/TJEWFI7D","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1301.2954&json=true","fetch_graph":"https://pith.science/api/pith-number/TJEWFI7DEF3XSDO36RGWF45GL6/graph.json","fetch_events":"https://pith.science/api/pith-number/TJEWFI7DEF3XSDO36RGWF45GL6/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/TJEWFI7DEF3XSDO36RGWF45GL6/action/timestamp_anchor","attest_storage":"https://pith.science/pith/TJEWFI7DEF3XSDO36RGWF45GL6/action/storage_attestation","attest_author":"https://pith.science/pith/TJEWFI7DEF3XSDO36RGWF45GL6/action/author_attestation","sign_citation":"https://pith.science/pith/TJEWFI7DEF3XSDO36RGWF45GL6/action/citation_signature","submit_replication":"https://pith.science/pith/TJEWFI7DEF3XSDO36RGWF45GL6/action/replication_record"}},"created_at":"2026-05-18T03:36:27.738337+00:00","updated_at":"2026-05-18T03:36:27.738337+00:00"}