Finally, it is not even clear that the zero lower bound is primarily responsible for high US unemployment. Traditional Keynesian frictions like the difficulty of reducing wages and benefits in some industries, as well as non-traditional frictions like the difficulty of moving when one cannot sell (or buy) a house, may share blame.
最后，利率低于零是不是美国高失业的主要原因还未可知。传统凯恩斯主义摩擦（比如难以降低某些行业的工资和福利）以及非传统摩擦（比如当你无法卖掉（或买到）房子时就没办法搬家）或许也起着同样重要的作用