Dollar Strength U.S. Treasury Secretary Steve Mnuchin stirred the currency market last week by initially saying at Davos that a weaker U.S. dollar would be good for U.S. exports (which is true), but he then subsequently asserted that a strong U.S. dollar is in the country’s long-term interest. A survey of 42 leading economists by the University of Chicago’s Initiative on Global Markets concurred on Mr. Mnuchin’s latter point, although several respondents cautioned that the benefits are not “substantial.” One even said the benefit is probably small with seigniorage probably contributing just 0.1 percent to gross domestic product (GDP). Another economist mentioned the adverse impact of a strong U.S. dollar on e...