The International Monetary Fund on Monday forecast the world economy will grow 3.9 percent this year, unchanged from its estimate in April, but warned that rising trade disputes between the United States and its trading partners could pose a "threat" to global growth.In its latest World Economic Outlook, the IMF projected Japan's economy will grow 1.0 percent in 2018, down 0.2 percentage point from the previous outlook, dragged down by weak private consumption and investment in the January to March quarter.The 2018 growth estimate for the United States was unchanged at 2.9 percent and that …READ FULL ARTICLE