the great but confused debate

I      for fiscal policy:paul krugman, delong

II    against fiscal policy but for nothing:gary becker

III  against fiscal policy and for monetary policy: greg.n.mankiw,fama

IV   against fiscal policy and for what i don't know:Tyler Cowen

他们在互相抱怨，沟通有问题，都说对方傻，但是他们说得角度不一样。krugman认为MP已经没用了，因为联邦指导利率已经zero了，FP可以短期内拉到需求，提供就业。mankiw认为FP会扭曲市场行为，MP还可以用一些创新性的金融手段拉动需求。