David Kohl, deputy chief economist at Julius Baer Holding AG, talks with Bloomberg's Mark Barton and Nina de Roy from Zurich about the role of central banks in the financial system following the central bankers' meeting in Jackson Hole, Wyoming. Former Bank of England policy maker Willem Buiter sparked the biggest debate at the annual mountainside symposium, saying the Federal Reserve pays too much heed to the concerns of financial institutions. (Source: Bloomberg)