For the ECB and the Bank of Japan (BOJ), both of which are facing formidable downside risks to their economies and aggregate price levels, this is hardly an idle question. For the United States, where the ultimate consequences of QE remain to be seen, the answer is just as consequential.
但这些武器可适用于它的任务吗？对欧洲央行和日本银行来说，它们都面临可怕的经济和总物价水平的下行风险，这绝不是一个可以等闲视之的问题。对美国来说，它的量化宽松最终后果还有待观察，答案也仍然有待揭露。