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Working Paper
International Reserves and Rollover Risk
We study the optimal accumulation of international reserves in a quantitative model of sovereign default with long-term debt and a risk-free asset. Keeping higher levels of reserves provides a hedge against rollover risk, but this is costly because using reserves to pay down debt allows the government to reduce sovereign spreads. Our model, parameterized to mimic salient features of a typical emerging economy, can account for a significant fraction of the holdings of international reserves, and the larger accumulation of both debt and reserves in periods of low spreads and high income. We ...
Journal Article
On the benefits of GDP-indexed government debt: lessons from a model of sovereign defaults
Whether governments should issue GDP-indexed sovereign debt continues to be the subject of policy debates. This article contributes to this debate by studying the effects of issuing GDP-indexed sovereign debt contracts using the equilibrium default model studied by Aguiar and Gopinath (2006) and Arellano (2008). We consider an extension with perfect indexation, i.e., the government issues Arrow-Debreu securities with payoffs that depend on the next-period aggregate income realization. The ex-ante welfare gain from the introduction of income-indexed bonds is equivalent to a permanent increase ...
Working Paper
Long-duration bonds and sovereign defaults
This paper extends the baseline framework used in recent quantitative studies of sovereign default by assuming that governments can borrow using long-duration bonds. Previous studies have assumed that governments can borrow using bonds that mature after one quarter. Once we assume that the government issues bonds with a duration that is close to the average duration observed in emerging economies, the model is able to generate a substantially higher and more volatile interest rate. This narrows the gap between the predictions of the model and the data, which indicates that the introduction of ...
Working Paper
International reserves and rollover risk
Two striking facts about international capital flows in emerging economies motivate this paper: (1) Governments hold large amounts of international reserves, for which they obtain a return lower than their borrowing cost. (2) Purchases of domestic assets by nonresidents and purchases of foreign assets by residents are both procyclical and collapse during crises. We propose a dynamic model of endogenous default that can account for these facts. The government faces a trade-off between the benefits of keeping reserves as a buffer against rollover risk and the cost of having larger gross debt ...
Working Paper
A theory of political cycles
We study how the proximity of elections affects policy choices in a model in which policymakers want to improve their reputation to increase their reelection chances. Policymakers' equilibrium decisions depend on both their reputation and the proximity of the next election. Typically, incentives to influence election results are stronger closer to the election (for a given reputation level), as argued in the political cycles literature, and these political cycles are less important when the policymaker's reputation is better. Our analysis sheds light on other agency relationships in which ...
Journal Article
Legal protection to foreign investors
Foreign investment is typically considered an important source of growth for developing countries. This article describes the legal protection granted to foreign investors and its enforcement mechanisms. Governments have signed international investment agreements intended to protect foreign investors from the risk of expropriation and have increasingly chosen to issue sovereign debt in international financial centers, which expose defaulting governments to litigations in foreign national courts. In most cases, governments have complied with unfavorable rulings of international arbitration ...
Working Paper
On the cyclicality of the interest rate in emerging economy models: solution methods matter
We study the sovereign default model that has been used to account for the cyclical behavior of interest rates in emerging market economies. This model is often solved using the discrete state space technique with evenly spaced grid points. We show that this method necessitates a large number of grid points to avoid generating spurious interest rate movements. This makes the discrete state technique significantly more inefficient than using Chebyshev polynomials or cubic spline interpolation to approximate the value functions. We show that the inefficiency of the discrete state space ...
Journal Article
Europe may provide lessons on preventing mortgage defaults
During the last global recession, house prices fell in some European countries almost as much as in some U.S. states. However, mortgage defaults occurred at a much lower rate in Europe. The authors say the difference might be explained by two regulations that apply in Europe but are used on a limited or much less restrictive basis in the U.S.
Working Paper
Sudden stops, time inconsistency, and the duration of sovereign debt
We study the sovereign debt duration chosen by the government in the context of a standard model of sovereign default. The government balances increasing the duration of its debt to mitigate rollover risk and lowering duration to mitigate the debt dilution problem. We present two main results. First, when the government decides the debt duration on a sequential basis, sudden stop risk increases the average duration by 1 year. Second, we illustrate the time inconsistency problem in the choice of sovereign debt duration: Governments would like to commit to a duration that is 1.7 years shorter ...