Econometrics in UK cartel damage cases: why is it failing?

Abstract Of the five cartel (Article 101 TFEU) damage cases that have gone to full trial in the UK BritNed v ABB, Royal Mail & BT v DAF, Granville v Chunghwa, Stellantis v Autoliv, and London Array v Nexans one or both parties’ experts gave econometric evidence which was rejected as ‘unreliable’, ‘biased’, and ‘unusable’ with one exception. In this article, I review the case outcomes, what they reveal about the use and limitations of econometrics, and the guidance that they give to economists presenting econometric evidence before the UK courts and the Competition Appeal Tribunal.