The US economy has benefited from two factors: its greater structural flexibility and dynamism relative to Europe, and the broader mandate of the US Federal Reserve, which has pursued a far more aggressive monetary policy than has the European Central Bank. Though analysts differ on the relative importance of these two factors – and, indeed, it is difficult to weight them – it is safe to say that both played a role in facilitating the US recovery.
美国经济受益于两个因素：它的结构弹性更大、相对欧洲活力更足；以及美联储权力更广，实施了远比欧洲央行更激进的货币政策。尽管对这两大因素谁更重要还存在争议——诚然，要作出比较十分困难——但可以确定地说，这两大因素都起到了促进美国复苏的作用。