The US and China will be the main pillar of support for the world economy

The half of the world economy is constituted by the European Union, China, and the United States. 

These three economies are strong. Their financial flows and trade are huge. Considering it, these economies drive the business cycle dynamics at a global level. However, this holds true only if they manage their policies in a coordinated approach. The G-20 was set up for the same purpose. Though, it did not turn well.