以前紹介したStephen Williamsonのエントリのコメント欄で、Williamsonが以下のようなことを書いていた。 I think what is true is that, if the central bank is behaving appropriately, we should hardly notice it is there. I think it is also true that the ability of a central bank to bringing about improvements in economic welfare, working through real activity, is extremely limited. However, a central bank is also capable of inflicting sign