Zero lower bound (ZLB) economics: The fallacy of New Keynesian explanations of stagnation

This paper explores zero lower bound (ZLB) economics. The ZLB is widely invoked to explain stagnation and it fits with the long tradition that argues Keynesian economics is a special case based on nominal rigidities. The ZLB represents the newest rigidity. Contrary to ZLB economics, not only does a laissez-faire monetary economy lack a mechanism for delivering the natural rate of interest, it may also lack such an interest rate. Moreover, the ZLB can be a stabilizing rigidity that prevents negative nominal interest rates exacerbating excess supply conditions.