James Darrell Duffie, a Canadian financial economist, who is Dean Witter Distinguished Professor of Finance at Stanford Graduate School of Business, arrives to participate as speaker in the ECB Forum on Central Banking on June 27, 2016 in Sintra, Portugal. The third annual European Central Bank Forum on Central Banking focuses on 'The future of the international monetary and financial architecture', a key topic of debate among economists and policymakers. Some 150 central bank governors, academics, financial journalists and high-level financial market representatives will discuss current policy issues and the chosen topic from a longer-term perspective.