Paul Krugman Talks about China

December 31, 2009, 1:23 pm

Macroeconomic effects of Chinese mercantilism

For something I’m working on: we know that China is pursuing a mercantilist policy: keeping the renminbi weak through a combination of capital controls and intervention, leading to trade surpluses and capital exports in a country that might well be a natural capital importer. We also know, or should know, that this amounts to a beggar-thy-neighbor policy — or, more accurately, a beggar-everyone but yourself policy — when the world’s major economies are in a liquidity trap.

But how big is the impact? Here’s a quick back-of-the-envelope assessment.

Start with the Chinese surplus. It has been temporarily depressed by the world trade collapse, but seems to be on the rise again. Blanchard and Milesi-Ferretti, at the IMF but speaking for themselves, project a Chinese current account surplus for 2010-2014 of 0.9 percent of gross world product.

You can think of this as a negative shock to rest-of-world net exports. (Technically, that’s not quite correct — because the shock depresses res-of-world GDP and hence rest-of-world imports from China, the realized trade surplus is smaller than the shock. But that’s a small correction.)

In turn, this negative shock is like a negative shock to government purchases of goods and services. So it should have a similar multiplier. Multiplier estimates are all over the place, but tend to cluster around 1.5. So we’re looking at a negative impact on gross world product of around 1.4 percent. Not huge — China isn’t the principal obstacle to recovery — but significant.

And, if we think of the United States as bearing a proportionate share, and also use the rule of thumb that one point of GDP = 1 million jobs, we’re looking at 1.4 million U.S. jobs lost due to Chinese mercantilism.

Thanks
Paul Ng