Not all of that extra output will remain in the United States. If the trade deficit is reduced by three percent of GDP, the rise in exports and decline in imports will reduce output available for U.S. consumption and investment by about 0.3 percent a year

The large trade and current account deficits of the United States cannot continue indefinitely because doing so would constitute a permanent gift to the U.S. economy. The process that will cause this gift to shrink and that will eventually cause it to reverse is a fall in the dollar. The dollar...