sentences:  He was appointed a Visiting Scholar at the International Monetary Fund (IMF) (2001–2002) working on risk appetite measures and at the European Central Bank (ECB) (2005) working on issues of liquidity and transparency in European financial markets.He is frequently a guest speaker at G20 central banks and meetings of officials.In December 2008, he was appointed a Member of the UN Commission of Experts on International Financial Reform.