In this unit, China did the making, and the United States did the buying. China did the saving, while the U.S. did the spending. Between 1995 and 2005, the U.S. savings rate declined from about 5 percent to zero, while the Chinese savings rate rose from 30 percent to nearly 45 percent.
This savings diversion allowed the Chinese to plow huge amounts of capital into the U.S. and dollar-denominated assets. Cheap Chinese labor kept American inflation low. Chinese efforts to keep the renminbi from appreciating against the dollar kept our currency strong and allowed us to borrow at low interest rates.
During the first few years of the 21st century, Chimerica worked great. This unit accounted for about a quarter of the world’s G.D.P. and for about half of global growth. But a marriage in which one partner does all the saving and the other partner does all the spending is not going to last.