By John H. Cochrane
Economists are full of bad ideas. Terrible ideas seem to emerge when the gurus get together to talk about coordinating their bad ideas. Last week's public letter from Treasury Secretary Tim Geithner to the G-20 finance ministers is a great example.
Mr. Geithner starts with a dramatic proposal: "G-20 countries should commit to undertake policies consistent with reducing external imbalances below a specified share of GDP [later reported to be 4%] over the next few years."
Since when is every trade surplus or deficit an "external imbalance" in need of correction? It makes sense for a country that has good investment prospects to import a lot of goods, run trade deficits, and borrow money. Years later, the country puts the resulting products on boats to pay the lenders back. The U.S. borrowed abroad to finance our railroads in the 19th century and ran surpluses when Europe was rebuilding after World War II. Were these "imbalances"?
Or consider a country (say, China) with a lot of middle-aged workers who need to save for retirement. It makes perfect sense for them to put stuff on boats and send it to a second country (say, the United States) whose people want to consume the goods. The people in the first country invest their earnings, say, by buying the bonds issued by the second country. And as they retire, they cash in the bonds and buy goods flowing the other way.
Do these and similar stories exactly account for current trade patterns? I don't know. But nobody else does, either. In particular, the army of economists in the basements of the International Monetary Fund (IMF) has no clue exactly how much each country should be saving, or where the best untapped global investment opportunities are around the world—including whether trade patterns are "normal" or "imbalanced."
Read the rest here.
John Cochrane is a professor of finance at the University of Chicago Booth School of Business.
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