Ranking Irish student performance

Thu, Dec 19, 2013, 01:05

Sir, – I would like to reassure Seán McDonagh (December 18th) that I am familiar with the economics literature to which he refers and the specific correlations reported therein.

Unlike him, I understand them. As anyone with the slightest knowledge of statistics knows, correlation is not causation. – Yours, etc,

KEVIN DENNY,

School of Economics &

Geary Institute,

University College Dublin,

Dublin 4.