The paper explicates the issues raised for macroprudential regulation in a global economy with high capital mobility. The study surveys the recent literature and aims to translate the academic rationale for such policies, in which market imperfections lead to external effects that require policy...

We show analytically that in a rational expectations present value model, an asset price manifests near random walk behavior if fundamentals are I(1) and the factor for discounting future fundamentals is near one. We argue that this result helps explain the well known puzzle that fundamental...