A balanced view of China's trade.

Want an easy way to eliminate the U.S. trade deficit? Just declare New York City a separate "entity," with its own balance-of-payments statistics. I can almost guarantee you that the trade deficit of the rest of the country--call it "mainland America"--will disappear.

After all, if New York's numbers were counted separately, we would no longer treat goods imported into New York as debit items in the U.S. balance of payments. Furthermore, all of the goods that mainland America ships to New York City would be considered U.S. exports. True, the goods that New York ships to the rest of the world would be struck off the export tally, while the goods the city ships to the rest of the United States would henceforth count as U.S. imports. But these would be minor adjustments: New York City is basically not in the business of producing physical objects. So we can be sure that the city runs a huge trade deficit--probably bigger than that of the United States as a whole, which is why splitting it off from the rest of the country would give the mainland a surplus.

Of course, most if not all of New York's deficit in goods trade is made up for by exports (to mainland America and the world at large) of intangibles such as financial services and tickets to see Cats; and the city also has a disproportionate number of wealthy residents, who receive lots of income from the property they own elsewhere. It would not be surprising to find that the city actually runs a surplus on its "current account," a measure that includes trade in services and investment income as well as the merchandise trade balance. But if it's the trade deficit you worry about, splitting New York off from mainland America will take care of the problem. Nothing real would have changed, but maybe it would make some people feel better.

What inspires this idea is China's assumption of political control over Hong Kong, which removes the last faint excuse for treating China and Hong Kong as separate economies--and therefore offers a way to make some of the same people feel better about another trade issue, the supposed threat posed by China's trade surplus. In recent years, China-sans-Hong Kong--what we used to call "mainland China"--has been running large and growing surpluses in its merchandise trade (although its balance on current account has fluctuated around zero). But China-plus-Hong Kong does not run big trade surpluses. In the year ending in April, China ran a trade surplus of almost $24 billion--but Hong Kong, as one would expect for a mainly service-producing city-state, ran an offsetting deficit of $19 billion, reducing the total to a fairly unimpressive $4.6 billion. China's trade surpluses, in other words, are largely a statistical illusion produced by the fact that so much of the management and ownership of the country's industry is located on the other side of an essentially arbitrary line.

Pointing this out doesn't change anything real, but perhaps it may help calm some of the fears being fostered by underemployed Japan-bashers who, like old cold warriors, have lately gone searching for new enemies.

Professional trade alarmist Alan Tonelson gave a particularly clear statement of the new fears in his New York Times review of The Big Ten: The Big Emerging Markets and How They Will Change Our Lives, a book by former Commerce Undersecretary Jeffrey Garten. (The review caught my eye because some of it matched word for word a recent speech by House Minority Leader and presidential hopeful Richard Gephardt.) After praising Garten for taking seriously the possibility that "the growing ability of the 10 to produce sophisticated goods and services at rock-bottom prices could drag down the standard of living of even affluent, well-educated Americans," Tonelson chided him for imagining that developing countries, China included, would provide important new markets for advanced-country exports: "[C]onsumer markets in these emerging countries are likely to stay small for decades ... if they don't keep wages and purchasing power low, they will have trouble attracting the foreign investment they require, both to service debt and to finance growth."

Iam always grateful when influential pundits make such statements, especially in prominent places, for in so doing they protect us from the ever-present temptation to take people seriously simply because they are influential, to imagine that widely held views must actually make at least some sense.

Tonelson's claim is that as emerging economies grow--that is, produce and sell greatly increased quantities of goods and services--their spending will not grow by a comparable amount; equivalently, he is claiming that they will run massive trade surpluses. But when a country grows, its total income must, by definition, rise one-for-one with the value of its production. Maybe you don't think that income will get paid out in higher wages, but it has to show up somewhere. And why should we imagine that people in emerging countries, unlike people in advanced nations, cannot find things to spend their money on?

In fact, one might well expect that emerging economies would typically run trade (or at least current account) deficits. After all, such countries will presumably attract inflows of foreign investment, allowing them to invest more than they save--which is to say, spend more than they earn. To put it another way, a country that attracts enough foreign investment "both to service debt and to finance growth" must, by definition, buy more goods and services than it sells--that is, run a trade deficit. The point, again, is that the money has to show up somewhere.

How can a country run a trade deficit when it has the huge cost advantage that comes from combining First World productivity with Third World wages? The answer is that the premise must be wrong: When productivity in emerging economies rises, so must wages--that is, the supposed situation in which these countries are able to "produce sophisticated goods and services at rock-bottom prices" never materializes.