Data Research – GEO Blog

Data Research

Statistics, research findings and trend data on AI search behaviour and brand citation patterns.

Why ChatGPT Citations Cluster Around a Small Set of Repeat Sources: The Long-Tail Citation Penalty Problem

ChatGPT doesn't distribute citations evenly. New research reveals why dominant sources capture disproportionate visibility while long-tail domains face near-invisibility in generative responses.

Sep 23, 2026 · 17 min read Read →

Why AI Search Engines Rank Sources Differently Across Platforms: Citation Behavior on Google, ChatGPT and Perplexity Compared

Google AI Overviews, ChatGPT, and Perplexity use fundamentally different citation logic. Here's why the same source ranks first on one platform and…

Aug 16, 2026 · 16 min read Read →