The Irish Times cannot call Nobel Prize-winning US economist Joseph Stiglitz as an expert witness in defence of a defamation claim brought by financier Dermot Desmond, the High Court has ruled. Desmond is suing the newspaper over its April 2016 reporting on the Panama Papers, the 11.5 million-document cache leaked from files of Panamanian lawyers in 2015 and disseminated by journalists from several newspapers including The Irish Times, The Guardian, and The Washington Post. The paper reported that several Irish people and businesses used the Panamanian lawyers to conduct business through offshore legal structures in tax havens such as Panama…