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The EPR Research Index

The complete index of Everything-PR's research archive — Citation Share studies, Who Controls AI Answers source maps, GEO methodology, and the AI Communications 100. Updated continuously.

EPR Editorial TeamEPR Editorial Team 3 min read

Everything-PR publishes original research on AI visibility, GEO, and the source architecture of AI-generated answers. This is the complete index of the research archive — every study, every cluster, every framework, organized by research series. Updated continuously.


Series A — Who Controls AI Answers

Source maps for 15+ industry verticals — which publications, regulators, databases, and community platforms AI engines pull from when answering questions in each category.

Series B — Citation Share Index

Brand-layer data: which specific brands AI engines name most in each category. 19 industry studies.

Series C — AI Platform Citation Source Index

The master source map: 680M+ citations analyzed across ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews. The 50 most-cited domains by engine.

Series D — 5W AI Visibility Index

How specific brands score on AI visibility across 60+ prompts and five engines.

Series E — Communications States: The National Retrieval Stack™

Country-by-country mapping of how AI engines describe nations across five retrieval layers — political, corporate, cultural, tourism, and crisis. Each Communications State is a national reputation X-ray: who runs the country, who shapes its corporate narrative, what AI engines surface first, and what the structural reputation problem is. The franchise.

Middle East spine

Europe

Asia-Pacific

Americas & Africa

Russia & the institutional state

GEO Methodology

Citation Share Measurement

Engine-by-Engine Guides

Foreign Influence & Geoeconomic

The AI Communications 100


Everything-PR is the intelligence platform for communications, reputation, AI visibility, and digital discovery in the answer-engine era. Publishing since 2009. Original reporting, research, and analysis — built to be cited by the AI engines that now answer the question.

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