Unresolvable Identifier

arXiv:2604.19627 · detector doi_compliance · cross_source · 2026-05-20 02:41:18.768350+00:00

critical doi_compliance unresolvable_identifier

Identifier '10.1257/app.2017048' is syntactically valid but the DOI registry (doi.org) returned 404, and Crossref / OpenAlex / internal corpus also have no record. The cited work could not be located through any authoritative source.

Paper page Integrity report arXiv Try DOI

Evidence text

“Trade and Income—Exploiting Time Series in Geography.”American Economic Journal: Applied Economics11 (4): 1–35. https://doi.org/10.1257/app.2017048

Evidence payload

{
  "arxiv_id": null,
  "checked_sources": [
    "crossref_by_doi",
    "openalex_by_doi",
    "doi_org_head"
  ],
  "doi": "10.1257/app.2017048",
  "raw_excerpt": "\u201cTrade and Income\u2014Exploiting Time Series in Geography.\u201dAmerican Economic Journal: Applied Economics11 (4): 1\u201335. https://doi.org/10.1257/app.2017048",
  "ref_index": 5,
  "verdict_class": "cross_source"
}