Ever since Roman times Asia had been a purveyor of valued goods for the tribute-taking classes of Europe and had thereby exercised a powerful pull on Europe's precious metals. This structural imbalance of European trade with the East created strong incentives for European governments and businesses to seek ways and means, through trade or conquest, to retrieve the purchasing power that relentlessly drained from West to East. As Josiah Child's contemporary Charles Davenant observed, whoever controlled the Asian trade would be in a position to "give law to all the commercial world" (Wolf 1982: 125).
Krugman:
Until around 2001, you could argue that it was: China’s overall trade position wasn’t too far out of balance. From then onward, however, the policy of keeping the yuan-dollar rate fixed came to look increasingly bizarre. First of all, the dollar slid in value, especially against the euro, so that by keeping the yuan/dollar rate fixed, Chinese officials were, in effect, devaluing their currency against everyone else’s. Meanwhile, productivity in China’s export industries soared; combined with the de facto devaluation, this made Chinese goods extremely cheap on world markets.
The result was a huge Chinese trade surplus. If supply and demand had been allowed to prevail, the value of China’s currency would have risen sharply. But Chinese authorities didn’t let it rise. They kept it down by selling vast quantities of the currency, acquiring in return an enormous hoard of foreign assets, mostly in dollars, currently worth about $2.1 trillion.
