At the time, many leaders seemed to think that the ECB's move would be enough: Announcement made, money printed, economies back on track. Unfortunately, that is not how monetary policy works: QE will not be enough, and no one should be naive about that.
比方说欧洲央行1月宣布采取的量化宽松政策。当时，很多领导人似乎认为欧洲央行此举已经足够：发公告、印货币、让经济重回轨道。不幸的是，这并不符合货币政策的运行规律：人们千万不能天真地以为仅仅实行量化宽松就够了。