At current prices combined US-China GDPs of $21.3trn & $14.2trn is 41% of global GDP of $87trn in 2018. Using Purchasing Power Parities the International Monetary Fund estimates China's value at 19trn & US at 15trn. China had been the world’s biggest economy for about 2 millennia & in the 1890s was overtaken by the United States.
Martin Wolf, chief economics commentator of the Financial Times, this week quoted lines from a poem by Robert Frost (1874-1963), an American poet, “Some say the world will end in fire/ Some say in ice.” Wolf said these lines "capture the world’s possible economic prospects. Some warn that the world of high debt and low-interest rates will end in the fire of inflation. Others prophesy that it will end in the ice of deflation." The more present economic danger this week is addressed in a special report in The Economist and David Rennie, the Beijing bureau chief and author of the Chaguan column on China, writes, "If a vengeful America wants to hurt China, there are few incentives for Chinese officials to propose imaginative concessions or urge reforms that might repair ties with America. In geopolitics as in marriage, contempt is an emotion that leads to bad outcomes."