BOSTON (MarketWatch) — The International Monetary Fund has just dropped a bombshell, and nobody noticed. For the first time, the international organization has set a date for the moment when the “Age of America” will end and the U.S. economy will be overtaken by that of China. According to the latest IMF official forecasts, China’s economy will surpass that of America in real terms in 2016 — just five years from now.

Under PPP, the Chinese economy will expand from $11.2 trillion this year to $19 trillion in 2016. Meanwhile the U.S. economy will rise from $15.2 trillion to $18.8 trillion. That would take America’s share of the world output down to 17.7%, the lowest in modern times. China’s would reach 18%, and is rising.

“There are two systems in collision,” said Ralph Gomory, research professor at NYU’s Stern business school. “They have a state-guided form of capitalism, and we have a much freer former of capitalism.” What we have seen, he said, is “a massive shift in capability from the U.S. to China. What we have done is traded jobs for profit. The jobs have moved to China. The capability erodes in the US and grows in China. That’s very destructive. That is a big reason why the U.S. is becoming more and more polarized between a small, very rich class and an eroding middle class. The people who get the profits are very different from the people who lost the wages.”