{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:4LCGNDZIQIXKPR3WBDCLECFPNG","short_pith_number":"pith:4LCGNDZI","canonical_record":{"source":{"id":"2109.04798","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2021-09-10T11:33:44Z","cross_cats_sorted":[],"title_canon_sha256":"8678376075cd3a6b8ff461716507a7d3dc05a7f5459226664d0a55fe2ba60b01","abstract_canon_sha256":"332401947575c582d56da6e5c3be59b6c2d0336551617a52b796728626b57497"},"schema_version":"1.0"},"canonical_sha256":"e2c4668f28822ea7c77608c4b208af69939ddc0cdf91035193a1370be6335c25","source":{"kind":"arxiv","id":"2109.04798","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.04798","created_at":"2026-07-05T03:13:10Z"},{"alias_kind":"arxiv_version","alias_value":"2109.04798v1","created_at":"2026-07-05T03:13:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.04798","created_at":"2026-07-05T03:13:10Z"},{"alias_kind":"pith_short_12","alias_value":"4LCGNDZIQIXK","created_at":"2026-07-05T03:13:10Z"},{"alias_kind":"pith_short_16","alias_value":"4LCGNDZIQIXKPR3W","created_at":"2026-07-05T03:13:10Z"},{"alias_kind":"pith_short_8","alias_value":"4LCGNDZI","created_at":"2026-07-05T03:13:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:4LCGNDZIQIXKPR3WBDCLECFPNG","target":"record","payload":{"canonical_record":{"source":{"id":"2109.04798","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2021-09-10T11:33:44Z","cross_cats_sorted":[],"title_canon_sha256":"8678376075cd3a6b8ff461716507a7d3dc05a7f5459226664d0a55fe2ba60b01","abstract_canon_sha256":"332401947575c582d56da6e5c3be59b6c2d0336551617a52b796728626b57497"},"schema_version":"1.0"},"canonical_sha256":"e2c4668f28822ea7c77608c4b208af69939ddc0cdf91035193a1370be6335c25","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:13:10.209285Z","signature_b64":"trG8CQdiIZAzS5vdNy2byiRfrWZsXYL1MWreMSjp6aRO/Gdu2t9oZpzQt4pnXKtaiL7Q+X2fe3MU1BzdlQh7AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e2c4668f28822ea7c77608c4b208af69939ddc0cdf91035193a1370be6335c25","last_reissued_at":"2026-07-05T03:13:10.208838Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:13:10.208838Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2109.04798","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":"2026-07-05T03:13:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fDxcS8Nl4tfNKgGvOzJxN4//3LEAEiWx6OKHyoilR1MW8JBsUByt/A9FC4Tv3aGVQCXM6OXtlsuvkH23VHCgCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T08:22:22.772301Z"},"content_sha256":"bf58bc73a03d13b3945d2d7fdf505934c7a6cd986906041075e889381e7187b8","schema_version":"1.0","event_id":"sha256:bf58bc73a03d13b3945d2d7fdf505934c7a6cd986906041075e889381e7187b8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:4LCGNDZIQIXKPR3WBDCLECFPNG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Reducing bias and alleviating the influence of excess of zeros with multioutcome adaptive LAD-lasso","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"stat.ME","authors_text":"Janne Salonen, Jyrki M\\\"ott\\\"onen, Mikko J. Sillanp\\\"a\\\"a, Tero L\\\"ahderanta","submitted_at":"2021-09-10T11:33:44Z","abstract_excerpt":"Zero-inflated explanatory variables are common in fields such as ecology and finance. In this paper we address the problem of having excess of zero values in some explanatory variables which are subject to multioutcome lasso-regularized variable selection. Briefly, the problem results from the failure of the lasso-type of shrinkage methods to recognize any difference between zero value occurring either in the regression coefficient or in the corresponding value of the explanatory variable. This kind of confounding will obviously increase number of false positives - all non-zero regression coef"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.04798","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2109.04798/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T03:13:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VPs7fEzctmXLkfJQKTEuugIBFIpsqGZ18NlAP0MVf6qHDkEmHAaUbxHCPHnRdMllU0fgMdDCYAPPrxTI5N7dDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T08:22:22.772758Z"},"content_sha256":"4b06c84e70384af48df8e16b20dbd8de2847fcf8a867b7a438e9a8b616266e4f","schema_version":"1.0","event_id":"sha256:4b06c84e70384af48df8e16b20dbd8de2847fcf8a867b7a438e9a8b616266e4f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4LCGNDZIQIXKPR3WBDCLECFPNG/bundle.json","state_url":"https://pith.science/pith/4LCGNDZIQIXKPR3WBDCLECFPNG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4LCGNDZIQIXKPR3WBDCLECFPNG/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":"2026-08-22T08:22:22Z","links":{"resolver":"https://pith.science/pith/4LCGNDZIQIXKPR3WBDCLECFPNG","bundle":"https://pith.science/pith/4LCGNDZIQIXKPR3WBDCLECFPNG/bundle.json","state":"https://pith.science/pith/4LCGNDZIQIXKPR3WBDCLECFPNG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4LCGNDZIQIXKPR3WBDCLECFPNG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:4LCGNDZIQIXKPR3WBDCLECFPNG","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":"332401947575c582d56da6e5c3be59b6c2d0336551617a52b796728626b57497","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2021-09-10T11:33:44Z","title_canon_sha256":"8678376075cd3a6b8ff461716507a7d3dc05a7f5459226664d0a55fe2ba60b01"},"schema_version":"1.0","source":{"id":"2109.04798","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.04798","created_at":"2026-07-05T03:13:10Z"},{"alias_kind":"arxiv_version","alias_value":"2109.04798v1","created_at":"2026-07-05T03:13:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.04798","created_at":"2026-07-05T03:13:10Z"},{"alias_kind":"pith_short_12","alias_value":"4LCGNDZIQIXK","created_at":"2026-07-05T03:13:10Z"},{"alias_kind":"pith_short_16","alias_value":"4LCGNDZIQIXKPR3W","created_at":"2026-07-05T03:13:10Z"},{"alias_kind":"pith_short_8","alias_value":"4LCGNDZI","created_at":"2026-07-05T03:13:10Z"}],"graph_snapshots":[{"event_id":"sha256:4b06c84e70384af48df8e16b20dbd8de2847fcf8a867b7a438e9a8b616266e4f","target":"graph","created_at":"2026-07-05T03:13:10Z","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/2109.04798/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Zero-inflated explanatory variables are common in fields such as ecology and finance. In this paper we address the problem of having excess of zero values in some explanatory variables which are subject to multioutcome lasso-regularized variable selection. Briefly, the problem results from the failure of the lasso-type of shrinkage methods to recognize any difference between zero value occurring either in the regression coefficient or in the corresponding value of the explanatory variable. This kind of confounding will obviously increase number of false positives - all non-zero regression coef","authors_text":"Janne Salonen, Jyrki M\\\"ott\\\"onen, Mikko J. Sillanp\\\"a\\\"a, Tero L\\\"ahderanta","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2021-09-10T11:33:44Z","title":"Reducing bias and alleviating the influence of excess of zeros with multioutcome adaptive LAD-lasso"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.04798","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:bf58bc73a03d13b3945d2d7fdf505934c7a6cd986906041075e889381e7187b8","target":"record","created_at":"2026-07-05T03:13:10Z","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":"332401947575c582d56da6e5c3be59b6c2d0336551617a52b796728626b57497","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2021-09-10T11:33:44Z","title_canon_sha256":"8678376075cd3a6b8ff461716507a7d3dc05a7f5459226664d0a55fe2ba60b01"},"schema_version":"1.0","source":{"id":"2109.04798","kind":"arxiv","version":1}},"canonical_sha256":"e2c4668f28822ea7c77608c4b208af69939ddc0cdf91035193a1370be6335c25","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e2c4668f28822ea7c77608c4b208af69939ddc0cdf91035193a1370be6335c25","first_computed_at":"2026-07-05T03:13:10.208838Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:13:10.208838Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"trG8CQdiIZAzS5vdNy2byiRfrWZsXYL1MWreMSjp6aRO/Gdu2t9oZpzQt4pnXKtaiL7Q+X2fe3MU1BzdlQh7AA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:13:10.209285Z","signed_message":"canonical_sha256_bytes"},"source_id":"2109.04798","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bf58bc73a03d13b3945d2d7fdf505934c7a6cd986906041075e889381e7187b8","sha256:4b06c84e70384af48df8e16b20dbd8de2847fcf8a867b7a438e9a8b616266e4f"],"state_sha256":"d2c0bfb3261b4c6128047d8e55616a9f6f861807ad4a73dec4d492bca2d6f40d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EjSrr3hkfnICmtPYAFpLFTYhsbu5Vi9P9OdHfdHx28/TZ5sJzZGLAzI7TNAjz1ylnszXsgQbJg7B9wEZ3iKTDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T08:22:22.776591Z","bundle_sha256":"8c364af60f9308307eefe5fdd1cd8b432ed0782b503ef15dc81f17bd8f4c34f5"}}