Some international meetings end up being all talk but no action. The Group of 20 (G20), representing the bulk of the world economy, can avoid this by setting up a “global economic coordination system” to enhance its effectiveness, a Chinese think tank has suggested.Despite a pledge to rehabilitate sluggish global growth, the G20 economies “have a common goal, but insufficient cooperation,” and their commitment can be followed up with implementation and better coordination, said the latest report from the Chongyang Institute for Financial Studies at Renmin University of China (RDCY), reports Xinhua.