Elo Rating System: how underrated are the kids?

An interesting phenomenon of the ELO rating system is that when examining game outcomes for a group of lower rated players, higher rated players tend to underperform relative to the theoretical ELO probability, and lower-rated players overperform. What are the causal factors explaining the inability of the ELO system to predict results? <a href="[Post:view_link]">A study by Ganesh Viswanath.</a>

Magnus Carlsen ranks the World Chess Champions

A look at the Elo ratings in the year 2021

Are Elo ratings going down?

Applications of the Elo rating system in adaptive educational systems - ScienceDirect

Can someone explain me, how can player gain 400 elo points (2100-2500) in span of one month? : r/chess

Comparing Fide Ratings Over Time – raskerino chess

Brooklyn Public School Is a Big Winner at National Championships - The New York Times

How do ratings on online chess sites (I'm active on chess.com) compare to official (FIDE or USCF) ratings? - Quora

MSE-optimal K-factor of the Elo rating system for round-robin tournament

Elo Rating System - Chess Terms

FIDE Mathematician Proposes Changes To Improve Rating Accuracy