From video refs to COVID vaccines
Ahead of last season, the Premier League (the top division of English football) announced the introduction of the VAR system. Sadly for us economists, this acronym had little to do with vector autoregressions. No, for football fans those three letters have a very different meaning — Video Assistant Referees. Much to the annoyance of supporters, VARs like to preserve an aura of mystery in their decision-making, and, safely immured in their headquarters at the Stockley Park VAR Hub, they may