The real effective exchange rate (REER) is one of the most cited statistical constructs in open-economy macroeconomics. We show that the models used to compute these numbers are not rich enough to allow for the rising importance of global value chains. Moreover, because different sectors within...

We provide a theory of the limits to monetary policy independence in open economies arising from the interaction between capital flows and domestic collateral constraints. The key feature is the existence of an "Expansionary Lower Bound" (ELB), defined as an interest rate threshold below which...

I explore the relationship between financial frictions and asset prices in a closed economy model, and study the implications for the leverage cycle of financial intermediaries. I develop a continuous-time dynamic macroeconomic model with heterogeneous agents and limited stock market...

Abstract I consider a small open economy model where international financial markets are imperfect and the exchange rate is determined by capital flows. I use this framework to study the effects of portfolio flow shocks, derive the optimal foreign exchange intervention policy, and...

In this paper, we argue that the effect of monetary and fiscal policies on the exchange rate depends on the fiscal regime. A contractionary monetary (expansionary fiscal) shock can lead to a depreciation, rather than an appreciation, of the domestic currency if debt is not backed by future...