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>

On Rating Deflation in Modern Chess

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

OC] Highest Rated Chess Players by Birthdate and Gender : r/chess

How good is 1800 blitz rating in chess.com? - Quora

FIDE Mathematician Proposes Changes To Improve Rating Accuracy

Elizabeth Spiegel's blog: March 2012

How Fightcade's Ranking System Works

Is This Variance Common For Higher Rated Players? - Chess Forums

Week 17 NFL Elo Ratings And Playoff Odds: Special Seahawks Edition

How Elo Ratings Actually Work - by Nate Solon - Zwischenzug

A fat tails flaw of the Elo System? : r/chess