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Working Paper
Sudden Stops and Optimal Foreign Exchange Intervention
This paper shows how foreign exchange intervention can be used to avoid a sudden stop in capital flows in a small open emerging market economy. The model is based around the concept of an under-borrowing equilibrium defined by Schmitt-Grohe and Uribe (2020). With a low elasticity of substitution between traded and non-traded goods, real exchange rate depreciation may generate a precipitous drop in aggregate demand and a tightening of borrowing constraints, leading to an equilibrium with an inefficiently low level of borrowing. The central bank can preempt this deleveraging cycle through ...
Fed’s 1994 Rate Aggressiveness Led to Emerging-Market Turmoil; Is This Time Different?
As the Federal Reserve embarks on a monetary tightening cycle, only a few spots of vulnerability have appeared among emerging markets.
Working Paper
Leverage constraints and the international transmission of shocks
Recent macroeconomic experience has drawn attention to the importance of interdependence among countries through financial markets and institutions, independently of traditional trade linkages. This paper develops a model of the international transmission of shocks due to interdependent portfolio holdings among leverage-constrained financial institutions. In the absence of leverage constraints, international portfolio diversification has no implications for macroeconomic comovements. When leverage constraints bind, however, the presence of diversified portfolios in combination with these ...
Working Paper
Sharing the burden: monetary and fiscal responses to a world liquidity trap
With integrated trade and financial markets, a collapse in aggregate demand in a large country can cause "natural real interest rates" to fall below zero in all countries, giving rise to a global "liquidity trap." This paper explores the optimal policy response to this type of shock, when governments cooperate on both fiscal and monetary policy. Adjusting to a large negative demand shock requires raising world aggregate demand, as well as redirecting demand towards the source (home) country. ; The key feature of demand shocks in a liquidity trap is that relative prices respond perversely. ...
Working Paper
Country portfolios in open economy macro models
This paper develops a simple approximation method for computing equilibrium portfolios in dynamic general equilibrium open economy macro models. The method is widely applicable, simple to implement, and gives analytical solutions for equilibrium portfolio positions in any combination or types of asset. It can be used in models with any number of assets, whether markets are complete or incomplete, and can be applied to stochastic dynamic general equilibrium models of any dimension, so long as the model is amenable to a solution using standard approximation methods. We first illustrate the ...
Working Paper
International financial integration and crisis contagion
International financial integration helps to diversify risk but also may increase the transmission of crises across countries. We provide a quantitative analysis of this trade-off in a two-country general equilibrium model with endogenous portfolio choice and collateral constraints. Collateral constraints bind occasionally, depending upon the state of the economy and levels of inherited debt. The analysis allows for different degrees of financial integration, moving from financial autarky to bond market integration and equity market integration. Financial integration leads to a significant ...
Working Paper
Exchange rate flexibility under the zero lower bound
An independent currency and a flexible exchange rate generally helps a country in adjusting to macroeconomic shocks. But recently in many countries, interest rates have been pushed down close to the lower bound, limiting the ability of policy-makers to accommodate shocks, even in countries with flexible exchange rates. This paper argues that if the zero bound constraint is binding and policy lacks an effective ?forward guidance? mechanism, a flexible exchange rate system may be inferior to a single currency area. With monetary policy constrained by the zero bound, under flexible exchange ...
Working Paper
Dollar bloc or dollar block: external currency pricing and the East Asian crisis
This paper provides a quantitative investigation of the East Asian crisis of 1997-99. The two essential features of the crisis that we focus on are a) the crisis was a regional phenomenon; the depth and severity of the crisis was exacerbated by a large decline in regional demand, and b) the practice of setting export goods prices in dollars (which we document empirically) led to a powerful internal propagation effect of the crisis within the region, contributing greatly to the decline in regional trade flows. We construct a model with these two features, and show that it can do a reasonable ...
Working Paper
Vehicle currency
While in principle, international payments could be carried out using any currency or set of currencies, in practice, the U.S. dollar is predominant in international trade and financial flows. The dollar acts as a "vehicle currency" in the sense that agents in nondollar economies will generally engage in currency trade indirectly using the U.S. dollar rather than using direct bilateral trade among their own currencies. Indirect trade is desirable when there are transactions costs of exchange.> ; This paper constructs a dynamic general equilibrium model of a vehicle currency. We explore the ...
Conference Paper
Global current account adjustment: a decomposition
The rising current account deficit in the USA has attracted considerable attention in recent years. We use the ?business cycle accounting? methodology to identify the principal distortions that have affected the external accounts of the US. In particular, we measure distortions in the optimality conditions of a simple two-country general equilibrium model using data from the US and the other G7 countries. We then feed these measured distortions into the model individually and use the simulated counterfactual paths of the current account to determine the contribution of each of these ?wedges? ...