{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:KWTPJOXQOB7X3L6VKY2BDTNNLL","short_pith_number":"pith:KWTPJOXQ","schema_version":"1.0","canonical_sha256":"55a6f4baf0707f7dafd5563411cdad5aec08985084955c056bfc31b8e8fd0085","source":{"kind":"arxiv","id":"2505.01133","version":1},"attestation_state":"computed","paper":{"title":"Product-level value chains from firm data: mapping trophic levels into economic growth","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["econ.GN","q-fin.EC"],"primary_cat":"physics.soc-ph","authors_text":"Andrea Tacchella, Andrea Zaccaria, Massimiliano Fessina","submitted_at":"2025-05-02T09:23:57Z","abstract_excerpt":"We reconstruct a product-level input-output network based on firm-level import-export data of Italian firms. We show that the network has a statistically significant, yet nuanced trophic structure, which is evident at the product level but is lost when the classification is coarse-grained. This detailed value chain allows us to characterize the trophic distance between inputs and outputs of single firms, and to derive a coherent picture at the sector level, finding that sectors such as weapons and vehicles are the ones with the largest increase in downstreamness between their inputs and their "},"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":"2505.01133","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2025-05-02T09:23:57Z","cross_cats_sorted":["econ.GN","q-fin.EC"],"title_canon_sha256":"b9d0a7a7df12909b19695786697d5f1acd1c247a1225c17776a239019e458f0c","abstract_canon_sha256":"9033474c420edf1085fd594754473499b2551306b26839a0718ba7e2a1ab16ee"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:57:45.889657Z","signature_b64":"TtfuLHY0R+v8dW9IOkamXZ/s6DM2CJH+WkI5PZeToIf4BzIE1DiXRh4nDxGc1y3ZmylTdZjx7X1ESk+Ss53VBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"55a6f4baf0707f7dafd5563411cdad5aec08985084955c056bfc31b8e8fd0085","last_reissued_at":"2026-07-05T10:57:45.889064Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:57:45.889064Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Product-level value chains from firm data: mapping trophic levels into economic growth","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["econ.GN","q-fin.EC"],"primary_cat":"physics.soc-ph","authors_text":"Andrea Tacchella, Andrea Zaccaria, Massimiliano Fessina","submitted_at":"2025-05-02T09:23:57Z","abstract_excerpt":"We reconstruct a product-level input-output network based on firm-level import-export data of Italian firms. We show that the network has a statistically significant, yet nuanced trophic structure, which is evident at the product level but is lost when the classification is coarse-grained. This detailed value chain allows us to characterize the trophic distance between inputs and outputs of single firms, and to derive a coherent picture at the sector level, finding that sectors such as weapons and vehicles are the ones with the largest increase in downstreamness between their inputs and their "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.01133","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/2505.01133/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2505.01133","created_at":"2026-07-05T10:57:45.889138+00:00"},{"alias_kind":"arxiv_version","alias_value":"2505.01133v1","created_at":"2026-07-05T10:57:45.889138+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.01133","created_at":"2026-07-05T10:57:45.889138+00:00"},{"alias_kind":"pith_short_12","alias_value":"KWTPJOXQOB7X","created_at":"2026-07-05T10:57:45.889138+00:00"},{"alias_kind":"pith_short_16","alias_value":"KWTPJOXQOB7X3L6V","created_at":"2026-07-05T10:57:45.889138+00:00"},{"alias_kind":"pith_short_8","alias_value":"KWTPJOXQ","created_at":"2026-07-05T10:57:45.889138+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2608.03716","citing_title":"Synthetic supply networks","ref_index":47,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/KWTPJOXQOB7X3L6VKY2BDTNNLL","json":"https://pith.science/pith/KWTPJOXQOB7X3L6VKY2BDTNNLL.json","graph_json":"https://pith.science/api/pith-number/KWTPJOXQOB7X3L6VKY2BDTNNLL/graph.json","events_json":"https://pith.science/api/pith-number/KWTPJOXQOB7X3L6VKY2BDTNNLL/events.json","paper":"https://pith.science/paper/KWTPJOXQ"},"agent_actions":{"view_html":"https://pith.science/pith/KWTPJOXQOB7X3L6VKY2BDTNNLL","download_json":"https://pith.science/pith/KWTPJOXQOB7X3L6VKY2BDTNNLL.json","view_paper":"https://pith.science/paper/KWTPJOXQ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2505.01133&json=true","fetch_graph":"https://pith.science/api/pith-number/KWTPJOXQOB7X3L6VKY2BDTNNLL/graph.json","fetch_events":"https://pith.science/api/pith-number/KWTPJOXQOB7X3L6VKY2BDTNNLL/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KWTPJOXQOB7X3L6VKY2BDTNNLL/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KWTPJOXQOB7X3L6VKY2BDTNNLL/action/storage_attestation","attest_author":"https://pith.science/pith/KWTPJOXQOB7X3L6VKY2BDTNNLL/action/author_attestation","sign_citation":"https://pith.science/pith/KWTPJOXQOB7X3L6VKY2BDTNNLL/action/citation_signature","submit_replication":"https://pith.science/pith/KWTPJOXQOB7X3L6VKY2BDTNNLL/action/replication_record"}},"created_at":"2026-07-05T10:57:45.889138+00:00","updated_at":"2026-07-05T10:57:45.889138+00:00"}