economic stimulus promised by US President-elect Joe Biden will give the global economy a chance to put the coronavirus pandemic behind it in 2021, policymakers and industry leaders told the Reuters Next conference.Their optimism came despite a resurgence in COVID-19 cases that has prompted the World Bank to downgrade its growth forecast for this year and warn that delays in vaccination programmes could pinch recovery even further.The head of German engineering giant Siemens AG said China is currently driving the world economy but was optimistic about recovery in the United States, where Biden has promised a faster roll-out of vaccines and more economic stimulus."In the US. ...