- No repeatable historical vacancy dataset was available; hiring growth, vacancy duration and completed hires are unmeasured.
- Publisher-side and intermediary-side hiring coverage is incomplete; third-party job mirrors were not treated as current primary postings.
- No relationship between a salary budget and external content-licensing spend has been established.
- Posting dates, headcount additions versus replacements, and archive-specific procurement mandates remain unknown.
Gaps for the next research pass
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