The global economy, battered by two years of crisis, is recovering faster than previously anticipated, with world growth bouncing back from negative territory in 2009 to a forecast 3.9 percent this year and 4.3 percent in 2011, the International Monetary Fund said in its latest forecast. But the recovery is proceeding at different speeds around the world, with emerging markets, led by Asia relatively vigorous, but advanced economies remaining sluggish and still dependent on government stimulus measures. For the moment, the recovery is very much based on policy decisions and policy actions. The question is when does private demand come and take over. Right now it's ok, but a year down the line, it will be a big question, said IMF Chief Economist. IMF feels countries risk a return to recession if anti-crisis measures are withdrawn too soon.