Real Exchange Rate Volatility and the Price of Nontradables in Sudden-Stop-Prone Economies

The dominant view in the empirical literature on exchange rates is that the high variability of real exchange rates is due to movements in exchange-rate-adjusted prices of tradable goods. This paper shows that this dominant view does not hold in Mexican data for the periods in which the country had managed exchange rate regimes. Variance analysis of a 30-year sample of monthly data shows that movements in the price of nontradables relative to tradables account for up to 70 percent of the variability of the real exchange rate during these periods. The paper proposes a model in which this stylized fact, and the Sudden Stops that accompanied the collapse of Mexico's managed exchange rates, could result from an endogenous amplification mechanism operating via nontradables prices in economies with dollarized liabilities and credit constraints. The key feature of this mechanism is Irving Fisher's debt-deflation process. Numerical evaluation suggests that the Fisherian deflation effects on consumption, the current account, and relative prices dwarf those induced by the standard balance sheet effect typical of the Sudden Stops literature.

Lessons From the Debt-Deflation Theory of Sudden Stops

This paper reports results for a class of dynamic, stochastic general equilibrium models with credit constraints that can account for some of the empirical regularities of the Sudden Stop phenomenon of recent emerging markets crises. In these models, credit constraints set in motion Irving Fisher's debt-deflation mechanism and they bind as an endogenous equilibrium outcome when agents are highly indebted. The quantitative predictions of these models yield three key lessons: (1) Sudden Stops can occur as an endogenous response to typical realizations of adverse shocks to fundamentals, in environments in which agents plan their actions taking credit constraints and expectations of Sudden Stops into account. (2) Credit constraints cause output declines during Sudden Stops when collateral constraints limit debt to a fraction of the market value of capital, when there are limits on access to working capital, or when debt-deflation lowers the value of the marginal product of factors of production. (3) The debt-deflation mechanism has significant quantitative effects in terms of the amplification, asymmetry and persistence of the responses of macroeconomic aggregates to standard shocks, and in the occurrence of Sudden Stops as infrequent events nested within regular business cycles. Precautionary saving rules out the largest Sudden Stops from the stochastic stationary state, but Sudden Stops remain a positive-probability event in the long run.

The Business Cycles of Balance-of-Payment Crises: A Revision of Mundellan Framework

In his seminal 1960 article Robert Mundell proposed a model of balance-of-payments crises in which confidence in the continuation of a currency peg depended on the observed holdings of central bank foreign reserves. We examine the implications of a reformulation of this view from the perspective of an equilibrium business cycle model in which the probability of devaluation is an endogenous variable conditioned on foreign reserves. The model explains some business cycle regularities of exchange-rate-based stabilizations while also producing devaluation probabilities that capture some features of devaluation probabilities estimated in the data. The analysis aims to explain both the real effects and the collapse of temporary fixed-exchange-rate regimes in an unified framework, and provides an economic interpretation for the evidence that foreign reserves are a robust leading indicator of currency crises.

Devaluation Risk and the Syndrome of Exchange-Rate-Based Stabilizations

This paper shows that the risk of devaluation can be an important factor accounting for the stylized facts of exchange-rate-based stabilizations. This conclusion follows from studying the quantitative implications of a two-sector equilibrium business cycle model of a small open economy calibrated to Mexico's 1987-1994 stabilization plan. In the model a time-variant interest rate differential that acts as a stochastic tax on money demand, labor supply, investment, and saving. Under incomplete markets, this tax induces endogenous state-contingent wealth effects via fiscal adjustment and suboptimal investment. Devaluation risk entails large welfare costs in this environment.

Financial Innovation, the Discovery of Risk, and the U.S. Credit Crisis

Financial innovation and overconfidence about asset values and the riskiness of new financial products were important factors behind the U.S. credit crisis. We show that a boom-bust cycle in debt, asset prices and consumption characterizes the equilibrium dynamics of a model with a collateral constraint in which agents learn \by observation" the true riskiness of a new financial environment. Early realizations of states with high ability to leverage assets into debt turn agents overly optimistic about the persistence probability of a high-leverage regime. Conversely, the first realization of a low-leverage state turns agents unduly pessimistic about future credit prospects. These effects interact with the Fisherian deflation mechanism, resulting in changes in debt, leverage, and asset prices larger than predicted under either rational expectations without learning or with learning but without Fisherian deflation. The model predicts a large, sustained increase in net household debt and in residential land prices between 1997 and 2006, followed by a sharp collapse in 2007.

Credit Frictions and 'Sudden Stops' in Small Open Economies: An Equilibrium Business Cycle Framework for Emerging Markets Crises

Financial frictions are a central element of most of the models that the literature on emerging markets crises has proposed for explaining the Sudden Stop' phenomenon. To date, few studies have aimed to examine the quantitative implications of these models and to integrate them with an equilibrium business cycle framework for emerging economies. This paper surveys these studies viewing them as ability-to-pay and willingness-to-pay variations of a framework that adds occasionally binding borrowing constraints to the small open economy real-business-cycle model. A common feature of the different models is that agents factor in the risk of future Sudden Stops in their optimal plans, so that equilibrium allocations and prices are distorted even when credit constraints do not bind. Sudden Stops are a property of the unique, flexible-price competitive equilibrium of these models that occurs in a particular region of the state space in which negative shocks make borrowing constraints bind. The resulting nonlinear effects imply that solving the models requires non-linear numerical methods, which are described in the survey. The results show that the models can yield relatively infrequent Sudden Stops with large current account reversals and deep recessions nested within smoother business cycles. Still, research in this area is at an early stage and this survey aims to stimulate further work.

Fiscal Policy and Macroeconomic Uncertainty in Emerging Markets: The Tale of the Tormented Insurer

Governments in emerging markets often behave like a "tormented insurer", trying to use non-state-contingent debt instruments to avoid sharp adjustments in their payments to private agents despite sharp fluctuations in public revenues. In the data, their ability to sustain debt is inversely related to the variability of their revenues, and their primary balances and current expenditures follow a procyclical pattern that contrasts sharply with the evidence from industrial countries. This paper proposes an equilibrium model of a small open economy with incomplete markets and aggregate uncertainty that can rationalize this behavior. In the model, a fiscal authority that chooses optimal expenditure and debt plans given stochastic revenues interacts with private agents that also make optimal consumption and asset accumulation plans. The competitive equilibrium of this economy is solved numerically as a Markov perfect equilibrium using parameter values calibrated to Mexican data. If perfect domestic risk pooling were possible, the ratio of public-to-private expenditures would be constant. With incomplete markets, however, this ratio fluctuates widely and results in welfare losses that dwarf previous estimates of the benefits of risk sharing and consumption smoothing. The model also yields a negative relationship between average public debt and revenue variability similar to the one observed in the data, and a correlation between output and government purchases that matches Mexican dataoptimal debt, fiscal solvency, procyclical fiscal policy, incomplete markets