{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:ULDUGH3OE64AX65XEB6F7MMVEG","short_pith_number":"pith:ULDUGH3O","canonical_record":{"source":{"id":"1501.03887","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2015-01-16T06:26:31Z","cross_cats_sorted":[],"title_canon_sha256":"68f4ec96ba1db5aa3731ae9d0b33e8025d408fe2bd515a6a805d50277aa0f43b","abstract_canon_sha256":"7942e1cf5d377488df4b76e829086cfd0a75caa530e7592157647e8cf5e6e9b4"},"schema_version":"1.0"},"canonical_sha256":"a2c7431f6e27b80bfbb7207c5fb19521ac229b5d8a64ba8ce353d53140f3eced","source":{"kind":"arxiv","id":"1501.03887","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.03887","created_at":"2026-05-18T02:29:16Z"},{"alias_kind":"arxiv_version","alias_value":"1501.03887v1","created_at":"2026-05-18T02:29:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.03887","created_at":"2026-05-18T02:29:16Z"},{"alias_kind":"pith_short_12","alias_value":"ULDUGH3OE64A","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_16","alias_value":"ULDUGH3OE64AX65X","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_8","alias_value":"ULDUGH3O","created_at":"2026-05-18T12:29:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:ULDUGH3OE64AX65XEB6F7MMVEG","target":"record","payload":{"canonical_record":{"source":{"id":"1501.03887","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2015-01-16T06:26:31Z","cross_cats_sorted":[],"title_canon_sha256":"68f4ec96ba1db5aa3731ae9d0b33e8025d408fe2bd515a6a805d50277aa0f43b","abstract_canon_sha256":"7942e1cf5d377488df4b76e829086cfd0a75caa530e7592157647e8cf5e6e9b4"},"schema_version":"1.0"},"canonical_sha256":"a2c7431f6e27b80bfbb7207c5fb19521ac229b5d8a64ba8ce353d53140f3eced","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:29:16.812548Z","signature_b64":"N5zyZz0pjQtsstNoVBYoqX5TYDJ0OVTyG5PK2iFGHNanbTNbyyk5uFOx+xcH9EkrqJ9sEZUV/E7rewuOcn2hCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a2c7431f6e27b80bfbb7207c5fb19521ac229b5d8a64ba8ce353d53140f3eced","last_reissued_at":"2026-05-18T02:29:16.812118Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:29:16.812118Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.03887","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":"2026-05-18T02:29:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"315/W+6yH994BgzK2UzlHz0XRyorvs0NYaOrDCyKpmAwS7YUTQyuKUdklDmLrp+/4WGRPASo9FXfYr2YCWwsAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T22:30:57.325076Z"},"content_sha256":"6dbac268e05237fc7d8fb6ddeaab2b5460cead380f902cf613f4252367750740","schema_version":"1.0","event_id":"sha256:6dbac268e05237fc7d8fb6ddeaab2b5460cead380f902cf613f4252367750740"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:ULDUGH3OE64AX65XEB6F7MMVEG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Editorial: Spatial accessibility of pediatric primary healthcare: Measurement and inference","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"stat.AP","authors_text":"Susan M. Paddock","submitted_at":"2015-01-16T06:26:31Z","abstract_excerpt":"Improving access to health care has long been at the forefront of policy debates in the U.S. There are multiple determinants of healthcare utilization: predisposing characteristics that explain individuals' propensities to use healthcare; enabling characteristics that describe the resources individuals have to use healthcare; and perceived or actual need for healthcare [Aday and Andersen (1974)]. Nobles, Serban and Swann (2014) illustrate the complexity involved with developing an understanding of one determinant of healthcare utilization. They examine spatial accessibility - an enabling chara"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.03887","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":"2026-05-18T02:29:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l0+YWn5gGGPFBLIa/cdqbHm5fwtESBo9TH3WNHeM7i6n6CWeHt9FGIwWh90rowR+SnP4jQtmB1c5SaJbYq9aCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T22:30:57.325450Z"},"content_sha256":"9bcb512761d2187cd768aadbd32056a60a811c956dfec7f284a9ef9d4b18ec11","schema_version":"1.0","event_id":"sha256:9bcb512761d2187cd768aadbd32056a60a811c956dfec7f284a9ef9d4b18ec11"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ULDUGH3OE64AX65XEB6F7MMVEG/bundle.json","state_url":"https://pith.science/pith/ULDUGH3OE64AX65XEB6F7MMVEG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ULDUGH3OE64AX65XEB6F7MMVEG/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":"2026-06-25T22:30:57Z","links":{"resolver":"https://pith.science/pith/ULDUGH3OE64AX65XEB6F7MMVEG","bundle":"https://pith.science/pith/ULDUGH3OE64AX65XEB6F7MMVEG/bundle.json","state":"https://pith.science/pith/ULDUGH3OE64AX65XEB6F7MMVEG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ULDUGH3OE64AX65XEB6F7MMVEG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:ULDUGH3OE64AX65XEB6F7MMVEG","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":"7942e1cf5d377488df4b76e829086cfd0a75caa530e7592157647e8cf5e6e9b4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2015-01-16T06:26:31Z","title_canon_sha256":"68f4ec96ba1db5aa3731ae9d0b33e8025d408fe2bd515a6a805d50277aa0f43b"},"schema_version":"1.0","source":{"id":"1501.03887","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.03887","created_at":"2026-05-18T02:29:16Z"},{"alias_kind":"arxiv_version","alias_value":"1501.03887v1","created_at":"2026-05-18T02:29:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.03887","created_at":"2026-05-18T02:29:16Z"},{"alias_kind":"pith_short_12","alias_value":"ULDUGH3OE64A","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_16","alias_value":"ULDUGH3OE64AX65X","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_8","alias_value":"ULDUGH3O","created_at":"2026-05-18T12:29:44Z"}],"graph_snapshots":[{"event_id":"sha256:9bcb512761d2187cd768aadbd32056a60a811c956dfec7f284a9ef9d4b18ec11","target":"graph","created_at":"2026-05-18T02:29:16Z","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":"Improving access to health care has long been at the forefront of policy debates in the U.S. There are multiple determinants of healthcare utilization: predisposing characteristics that explain individuals' propensities to use healthcare; enabling characteristics that describe the resources individuals have to use healthcare; and perceived or actual need for healthcare [Aday and Andersen (1974)]. Nobles, Serban and Swann (2014) illustrate the complexity involved with developing an understanding of one determinant of healthcare utilization. They examine spatial accessibility - an enabling chara","authors_text":"Susan M. Paddock","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2015-01-16T06:26:31Z","title":"Editorial: Spatial accessibility of pediatric primary healthcare: Measurement and inference"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.03887","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":"sha256:6dbac268e05237fc7d8fb6ddeaab2b5460cead380f902cf613f4252367750740","target":"record","created_at":"2026-05-18T02:29:16Z","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":"7942e1cf5d377488df4b76e829086cfd0a75caa530e7592157647e8cf5e6e9b4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2015-01-16T06:26:31Z","title_canon_sha256":"68f4ec96ba1db5aa3731ae9d0b33e8025d408fe2bd515a6a805d50277aa0f43b"},"schema_version":"1.0","source":{"id":"1501.03887","kind":"arxiv","version":1}},"canonical_sha256":"a2c7431f6e27b80bfbb7207c5fb19521ac229b5d8a64ba8ce353d53140f3eced","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a2c7431f6e27b80bfbb7207c5fb19521ac229b5d8a64ba8ce353d53140f3eced","first_computed_at":"2026-05-18T02:29:16.812118Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:29:16.812118Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"N5zyZz0pjQtsstNoVBYoqX5TYDJ0OVTyG5PK2iFGHNanbTNbyyk5uFOx+xcH9EkrqJ9sEZUV/E7rewuOcn2hCg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:29:16.812548Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.03887","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6dbac268e05237fc7d8fb6ddeaab2b5460cead380f902cf613f4252367750740","sha256:9bcb512761d2187cd768aadbd32056a60a811c956dfec7f284a9ef9d4b18ec11"],"state_sha256":"69878f5a167b5d9d70c43d95b1df4379173f14ca5290f6a56599dd907db9ef14"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sjaDvzdAeKYXzad/9108IKFIWvaogBsSi45Sx2naAgFVN17PfzmGea90coAWApFT5MA47I1dKlG9Rn3MGa5fBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-25T22:30:57.327422Z","bundle_sha256":"e5cfc012b784c8c1dd25907e49c1bea39dfef9b2ce6e23f1495d24e29dc7ed30"}}