Luzi Hail and Christian Leuz, ‘Capital market effects of mandatory IFRS reporting in the EU: empirical evidence’, look at the effects of mandatory IFRS adoption for 2,761 firms from 18 EU countries and compare them with about 25,000 voluntary adopters and non-adopters from the same EU countries and 33 non-EU countries. The paper covers the period 2001–2005, but for 2005 the sample is limited to firms with a 31 December year end. The tests include comparisons between the two years 2004 and 2005.