Currency Wars Aren't Zero Sum

A blog about business and economics.
Dec. 28 2012 10:27 AM

Currency Wars Aren't Zero Sum

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Japan's new Prime Minister Shinzo Abe (C) and fellow members from the ruling Liberal Democratic Party attend a plenary session of the lower house at parliament in Tokyo on December 27, 2012.

Photo by KAZUHIRO NOGI/AFP/Getty Images

Obviously countries can't all increase net exports simultaneously. But that doesn't mean that coordinated monetary expansion is zero sum. The reason is that currency depreciation is inflationary. Yes, it can increase net exports. But it increases net exports in part by making foreign goods more expensive to domestic buyers (which raises domestic prices in an obvious way) and in part by making domestic goods cheaper to foreign buyers which also makes domestic prices higher by forcing domestic buyers to compete with foreign ones. So any serious effort to pursue expansion via currency depreciation is necessarily an effort to pursue expansion via greater tolerance for inflation. And while all the different countries of the world can't simultaneously increase net exports they can certainly simultaneously pursue a higher nominal growth path via higher tolerance for inflation.

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The consequences of such an approach might be disastrous. Perhaps we'll just see ruinous investment-distorting inflation. Or they might be great. I see large output gaps that could be sharply narrowed by such a policy. But it's not zero sum unless the governments pursuing the policy were never serious about it.

Matthew Yglesias is the executive editor of Vox and author of The Rent Is Too Damn High.

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