Olivier Blanchard, chief economist of the International Monetary Fund (IMF), speaks at a news conference on the updated World Economic Outlook (WEO), a twice-yearly flagship report, in Washington D.C., capital of the United States, Jan. 23, 2013. The IMF said Wednesday that the world economy stands poised for a gradual upturn in 2013 with output rising by 3.5 percent. (Xinhua/Wang Yiou)

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