Found via Calculated Risk.
The United States and much of the developed world are in a liquidity trap. However, policymakers still have not embraced this diagnosis which is a problem as solutions to a liquidity trap require specific sets of policies. There are policies that will work, and there are policies that will not work. Correct diagnosis is necessary to prescribe the right policy medication.
A liquidity trap is a circumstance in which the private sector is deleveraging in the wake of enduring negative animal spirits caused by the bursting of joint asset price and credit bubbles that leave private sector balance sheets severely damaged. In a liquidity trap the animal spirits of the private sector cannot be revived by a reduction in short-term interest rates because there is no demand for credit. This effectively means that conventional monetary policy does not work in a liquidity trap.