{"as_of":"2026-08-19T03:01:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:41eadf9fd775f1ab13f339250ccd5b858719630a1cc9dfd65c6c33732f96920b","coverage":[{"denominator":0,"lane":"reference_resolution","note":"Typed states for the displayed outbound observations.","records_observed":0,"source":"paper_references, paper_reference_links","source_observed_at":null,"state":"measured"},{"denominator":3,"lane":"standing_notices","note":"One-hop event checks from named stored sources.","records_observed":3,"source":"scholarly_work_events, retraction_status_cache","source_observed_at":"2026-08-18T06:34:40.430872+00:00","state":"measured"},{"denominator":3,"lane":"inbound_itemization","note":"Pith citing papers itemized under the disclosed page cap.","records_observed":3,"source":"paper_references, paper_reference_links","source_observed_at":"2026-08-11T12:20:15.995068Z","state":"measured"},{"denominator":1,"lane":"external_citation_measurements","note":"A source-named dated measurement, never combined with another source.","records_observed":0,"source":"arxiv_reference","source_observed_at":"2026-07-04T19:20:07.101998Z","state":"measured"}],"external_citation_measurements":[],"inbound":[{"citation":{"cited_paper":{"arxiv_id":"2202.02903","last_updated":"2024-06-24T02:21:44Z","snapshot_observed_at":"2026-08-18T21:25:07.819560Z","submitted_at":"2022-02-07T01:50:18Z","title":"Difference in Differences with Time-Varying Covariates","version":3},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"2202.02903","snapshot_observed_at":"2026-08-11T12:20:15.995068Z","title":"Callaway, S","venue":null,"work_id":null,"year":2022},"citing_paper":{"arxiv_id":"2412.14447","last_updated":"2025-07-24T17:22:43Z","snapshot_observed_at":"2026-08-17T19:57:20.064462Z","submitted_at":"2024-12-19T01:54:35Z","title":"Good Controls Gone Bad: Difference-in-Differences with Covariates","version":2},"reference_index":7,"source":"arxiv_source","source_observed_at":"2026-08-11T12:20:15.995068Z"},"links":{"cited_paper":"/paper/2202.02903","citing_paper":"/paper/2412.14447"},"observation_digest":"sha256:3640768abb65822a91c99c370c2e5ae40de3d7f673690200e1fb13cd05917ade","observation_id":"7116668e-73a0-48e5-9975-b55c68b2ba6c","resolution":{"observed_at":"2026-08-11T12:20:15.995068Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"2202.02903","last_updated":"2024-06-24T02:21:44Z","snapshot_observed_at":"2026-08-18T21:25:07.819560Z","submitted_at":"2022-02-07T01:50:18Z","title":"Difference in Differences with Time-Varying Covariates","version":3},"cited_work":{"arxiv_id":"2202.02903","doi":null,"metadata_source":"arxiv_reference","pith_arxiv_id":"2202.02903","snapshot_observed_at":"2026-07-04T19:20:07.101998Z","title":"Difference in Differences with Time-Varying Covariates","venue":null,"work_id":"bc74f9ad-1f76-4448-9338-b2f65224980c","year":2024},"citing_paper":{"arxiv_id":"2605.01114","last_updated":"2026-05-01T21:37:17Z","snapshot_observed_at":"2026-08-17T17:34:06.471558Z","submitted_at":"2026-05-01T21:37:17Z","title":"A formal approach to variable selection in difference-in-differences","version":1},"reference_index":43,"source":"pdf_text","source_observed_at":"2026-05-09T18:29:57.023794Z"},"links":{"cited_paper":"/paper/2202.02903","citing_paper":"/paper/2605.01114"},"observation_digest":"sha256:77d8caf3623e0ae3cee2ba581e7f155ff337c3e7afc0e1ac3ae9a43e373a072c","observation_id":"2a452419-16e3-47df-8e5b-57c93ddc48eb","resolution":{"observed_at":"2026-05-11T16:11:11.778107Z","resolver_source":"arxiv_id","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-18T06:34:40.430872+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-18T06:34:40.430872+00:00","source":"crossref"},{"observed_at":"2026-08-18T06:34:34.496301+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"2202.02903","last_updated":"2024-06-24T02:21:44Z","snapshot_observed_at":"2026-08-18T21:25:07.819560Z","submitted_at":"2022-02-07T01:50:18Z","title":"Difference in Differences with Time-Varying Covariates","version":3},"cited_work":{"arxiv_id":"2202.02903","doi":null,"metadata_source":"arxiv_reference","pith_arxiv_id":"2202.02903","snapshot_observed_at":"2026-07-04T19:20:07.101998Z","title":"Difference in Differences with Time-Varying Covariates","venue":null,"work_id":"bc74f9ad-1f76-4448-9338-b2f65224980c","year":2024},"citing_paper":{"arxiv_id":"2606.24785","last_updated":"2026-06-23T16:44:50Z","snapshot_observed_at":"2026-08-14T18:41:37.086112Z","submitted_at":"2026-06-23T16:44:50Z","title":"Group-Level Treatment Effect Heterogeneity in Difference-in-Differences: A Balanced Approach","version":1},"reference_index":28,"source":"arxiv_source","source_observed_at":"2026-06-25T21:24:07.196852Z"},"links":{"cited_paper":"/paper/2202.02903","citing_paper":"/paper/2606.24785"},"observation_digest":"sha256:301e138142b943f27c779c626f99cca80f2daa0e717f7631ed10030c11c4bd89","observation_id":"0daedf07-9fea-4b00-8d2f-90f1e050685f","resolution":{"observed_at":"2026-07-04T19:20:07.103735Z","resolver_source":"arxiv_id","status":"metadata_mismatch"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-18T06:34:40.430872+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-18T06:34:40.430872+00:00","source":"crossref"},{"observed_at":"2026-08-18T06:34:34.496301+00:00","source":"retraction_watch"}],"state":"measured"}}],"links":{"evidence":"/evidence","html":"/paper/2202.02903/citation-record","integrity":"/paper/2202.02903/integrity","json":"/paper/2202.02903/citation-record.json","paper":"/paper/2202.02903"},"outbound":[],"paper":{"arxiv_id":"2202.02903","last_updated":"2024-06-24T02:21:44Z","latest_version":3,"primary_category":"econ.EM","snapshot_observed_at":"2026-08-18T21:25:07.819560Z","submitted_at":"2022-02-07T01:50:18Z","title":"Difference in Differences with Time-Varying Covariates"},"reference_resolution":{"displayed":0,"state_counts":{"malformed_identifier":0,"metadata_mismatch":0,"parse_uncertain":0,"unresolved":0,"verified_exact":0,"verified_fuzzy":0},"total_outbound_references":0},"refusal":"A citation records a reference. It does not transfer a finding from one paper to another.","schema":"pith.paper-citation-record.v1","standing_sources":[{"observed_at":"2026-08-18T06:34:40.430872+00:00","source":"crossref"},{"observed_at":"2026-08-18T06:34:34.496301+00:00","source":"retraction_watch"}],"thesis":"As of 19 August 2026, this Paper Citation Record lists 0 of 0 outbound references and 3 inbound Pith citation observations for arXiv:2202.02903."}