Transparency in data origin is the foundation of research trust. This document outlines the authoritative datasets, collection pipelines, and mathematical normalization protocols utilized across Impact Factor Site.
Primary Data Repositories
| Bibliometric Indicator | Primary Source Database | Indexing Scope | Collection Cadence |
|---|---|---|---|
| Journal Impact Factor (JIF) | Clarivate Journal Citation Reports® (JCR) | Web of Science Core Collection (SCIE, SSCI, AHCI, ESCI) | Annual (June) |
| CiteScore & CiteScore Tracker | Elsevier / Scopus® | Scopus Journal Master Database (27,000+ titles) | Annual & Monthly Tracker |
| SCImago Journal Rank (SJR) | SCImago / Scopus | Scopus Core Index | Annual |
| SNIP (Source Normalized Impact) | CWTS Leiden / Scopus | Scopus Core Index | Annual |
| Open Access & APC Data | DOAJ & Official Publisher Pages | Peer-reviewed open access publishers | Quarterly |
Data Cleaning & ISSN Disambiguation
Many academic journals operate with both a Print ISSN and an Electronic ISSN (e-ISSN), or have undergone title changes across historical publishing eras. Our database normalization pipeline maps all ISSN variations to canonical journal entities to ensure citation calculations never suffer from fragmentation.
Disclaimers & Intellectual Property
Journal Impact Factor and JCR are registered trademarks of Clarivate. Scopus and CiteScore are registered trademarks of Elsevier. Impact Factor Site uses these figures strictly under fair-use citation and academic reporting principles for research reference and educational analysis.