Xanthi Gkougkousi and Gerard Mertens, ‘Impact of mandatory IFRS adoption on the financial sector’, look at the effects of mandatory IFRS adoption on European banks and insurers. For the cost of equity capital tests the sample is 891 firm-years (8% non-EU) for firms from 24 countries (two non-EU: Iceland and Norway). The period covered is 2002– 2007. The control is a matched sample of US firms.