InvestmentsTop Global NewsMarketsReal Estate Collapse of global tax talks could cost US$100 billion, OECD says By financialnews_rlv83x - October 12, 2020 0 256 The global economy could shed more than 1per cent of output if international talks to rewrite cross-border tax rules break down and trigger a trade war, the OECD said on Monday, after countries agreed to keep up negotiating to mid-2021.