The Authority Index

Engine Analysis

Comparative evaluations of how AI engines source, rank, and present references across answer formats.

  1. Who Wins the Pricing War? Comparative Citation Share in ChatGPT

    Research-led analysis of Citation Share in ChatGPT pricing queries: how citations are distributed, how to measure share, and what improves it reliably.

    2/26/2026 | Dr. Elena Markov

  2. Does Schema Complexity Matter? How Nested Structured Data Drives AI Citations

    Tested evidence shows deeper schema nesting can raise citations. Learn structured data impact on AI answers, especially in Google AI Overviews, with clear KPIs.

    2/26/2026 | Marcus Vale