Domestic Determinants of the Current Account Balance of the United States
研究发现美国经济足够开放，过去二十年国民储蓄率变化越来越多地被净外国投资而非国内投资所匹配，因此政策讨论中假设提高储蓄率会完全增加美国生产性资本存量是不符合事实的。
The U. S. economy is found to be sufficiently open to make the balance on foreign transactions an essential part of the equilibration process between saving and investment. Specifically, over the past two decades, changes in the national saving rate have increasingly been matched by changes in net foreign rather than domestic investment. Thus, it would be counterfactual to assume in policy discussions that measures to raise the national saving rate add fully to the stock of productive capital in the United States, barring only Keynesian complications. Conversely, a stimulus to domestic investment could be validated in part by drawing on foreign saving.