摘要：Abstract This paper examines the effectiveness of {US} macroeconomic policy in an open economy model focused on the exchange rate and trade balance. Yearly data cover the period of the dollar float from 1974 to 2009. Monetary expansion raises output weakly but depreciates the dollar and lowers the trade balance. Fiscal “expansion” decreases output. There is a polar deficit effect between the government budget and trade balance. These results question a number of standard policy prescriptions. The implied structural coefficients suggest rethinking a number of accepted theoretical assumptions.
