If a trade deficit is determined solely by rates of savings and investment, then the U.S. trade deficit will be impervious to a get-tough trade policy. Slapping higher tariffs on imports will only deprive foreigners of the dollars they would have earned by selling in the U.S. market.

If a trade deficit is determined solely by rates of savings and investment, then the U.S. trade deficit will be impervious to a get-tough trade policy. Slapping higher tariffs on imports will only deprive foreigners of the dollars they would have earned by selling in the U.S. market.