those present during the depression of the 1930s. By the end of December 2008, the Financial Times reported that "the sudden resurgence of Keynesian policy is a stunning reversal of the orthodoxy of the past several decades." In December 2008, Paul Krugman released his book The Return of Depression Economics and the Crisis of 2008, arguing that economic conditions similar to those that existed during the earlier part of the 20th century had returned, making Keynesian policy prescriptions more relevant than ever. In February 2009 Robert J. Shiller and George Akerlof published Animal Spirits, a book where they argue the current US stimulus package is too small as it does not take into account Keynes's insight on the importance of confidence and expectations in determining the future behaviour of businesspeople and other economic agents. In the March 2009 speech entitled Reform the International Monetary System, Zhou Xiaochuan, the governor of the People's Bank of China, came out in favour of Keynes's idea of a centrally managed global reserve currency. Zhou argued that it was unfortunate that part of the reason for the Bretton Woods system breaking down was the failure to adopt Keynes's bancor. Zhou proposed a gradual move towards increased use of IMF special drawing rights (SDRs). Although Zhou's ideas had not been broadly accepted, leaders meeting in April at the 2009 G-20 London summit agreed to allow $250 billion of special drawing rights to be created by the IMF, to be distributed globally. Stimulus plans were credited for contributing to a better than expected economic outlook by both the OECD and the IMF, in reports published in June and July 2009. Both organisations warned global leaders that recovery was likely to be slow, so counter recessionary measures ought not be rolled back too early. While the need for stimulus measures was broadly accepted among policy makers, there had been much debate over how to fund the spending. Some leaders and institutions, such as Angela Merkel and the European Central Bank, expressed concern over the potential impact on inflation, national debt and the risk that a too large stimulus will create an unsustainable recovery. Among professional economists the revival of Keynesian economics has been even more divisive. Although many economists, such as George Akerlof, Paul Krugman, Robert Shiller and Joseph Stiglitz, supported Keynesian stimulus, others did not believe higher government spending would help the United States economy recover from