{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:SKEJQSFUR3CAXFDMDHJXQ4CXEQ","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":"9eb9ec588c1d2656709a023282d65f56a356cdc4685db14db2ab15ed823f7a25","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2019-04-02T16:14:01Z","title_canon_sha256":"df8798d12360cb2bc50e1bcf9a091d3afdd417444d1de3a428ceacf8bdd23cd1"},"schema_version":"1.0","source":{"id":"1904.01524","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.01524","created_at":"2026-05-17T23:49:28Z"},{"alias_kind":"arxiv_version","alias_value":"1904.01524v2","created_at":"2026-05-17T23:49:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.01524","created_at":"2026-05-17T23:49:28Z"},{"alias_kind":"pith_short_12","alias_value":"SKEJQSFUR3CA","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"SKEJQSFUR3CAXFDM","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"SKEJQSFU","created_at":"2026-05-18T12:33:27Z"}],"graph_snapshots":[{"event_id":"sha256:f7954ef21bb9d22d199c72c6fa91dbe9ddc72437e9461bca4de4125995dce172","target":"graph","created_at":"2026-05-17T23:49:28Z","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":"Researchers rely on the distance function to model multiple product production using multiple inputs. A stochastic directional distance function (SDDF) allows for noise in potentially all input and output variables. Yet, when estimated, the direction selected will affect the functional estimates because deviations from the estimated function are minimized in the specified direction. The set of identified parameters of a parametric SDDF can be narrowed via data-driven approaches to restrict the directions considered. We demonstrate a similar narrowing of the identified parameter set for a shape","authors_text":"Andrew L. Johnson, Gary D. Ferrier, Kevin Layer, Robin C. Sickles","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2019-04-02T16:14:01Z","title":"Direction Selection in Stochastic Directional Distance Functions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.01524","kind":"arxiv","version":2},"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:cf975fb09f96a9e436544d4490eba2ec2897dce98ec400c933796f665cebc45c","target":"record","created_at":"2026-05-17T23:49:28Z","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":"9eb9ec588c1d2656709a023282d65f56a356cdc4685db14db2ab15ed823f7a25","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2019-04-02T16:14:01Z","title_canon_sha256":"df8798d12360cb2bc50e1bcf9a091d3afdd417444d1de3a428ceacf8bdd23cd1"},"schema_version":"1.0","source":{"id":"1904.01524","kind":"arxiv","version":2}},"canonical_sha256":"92889848b48ec40b946c19d3787057240446fcb63c0c91a948e9b6e2271d604b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"92889848b48ec40b946c19d3787057240446fcb63c0c91a948e9b6e2271d604b","first_computed_at":"2026-05-17T23:49:28.593261Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:49:28.593261Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UieK2F1JJg96v+q77q1pI+NQwCDsTsM7OnMo556gwWTokym3itOESZL4lDApsLJrHamhU62SctRu1jl5EJTIBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:49:28.593915Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.01524","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cf975fb09f96a9e436544d4490eba2ec2897dce98ec400c933796f665cebc45c","sha256:f7954ef21bb9d22d199c72c6fa91dbe9ddc72437e9461bca4de4125995dce172"],"state_sha256":"a71991733ff7f9b1ac7c973eee2fba9f5895579eb1a03edd05951315f96c7352"}