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Journal Article
Is a weak dollar inflationary?
Since the early seventies, the U.S. dollar has been allowed to float freely, and its exchange rates have become extremely volatile and difficult to explain, let alone to predict. The dollar's erratic behavior has stimulated a lively debate in academic and policy circles over what the government's response should be. One of the major questions that must be answered before a response can be contemplated is whether dollar exchange rate changes influence U.S. inflation. ; This article examines the empirical relationship between dollar movements and inflation in the United States. Historical ...
Working Paper
Financial crises in emerging markets: a canonical model
We present a simple model that can account for the main features of recent financial crises in emerging markets. The international illiquidity of the domestic financial system is at the center of the problem. Illiquid banks are a necessary and a sufficient condition for financial crises to occur. Domestic financial liberalization and capital flows from abroad (especially if short-term) can aggravate the illiquidity of banks and increase their vulnerability to exogenous shocks and shifts in expectations. A bank collapse multiplies the harmful effects of an initial shock, as a credit squeeze ...
Journal Article
Understanding recent crises in emerging markets
The world economy is going through a difficult and dangerous period. The recent Brazilian currency meltdown is one more in a series of events that includes the Asian crises of 1997-98 and the Mexican crash in 1994, and there is uncertainty about whether other emerging economies will be infected with the Brazilian virus. ; Dealing with crises in emerging economies is, therefore, an urgent matter. However, what to do about these crises is a source of heated debate. According to the author of this article, much of the confusion arises from the fact that accumulated knowledge about crises in ...
Working Paper
Bargaining a monetary union
Working Paper
Political party negotiations, income distribution, and endogenous growth
This paper examines the determination of the rate of growth in an economy in which two political parties, each representing a different social class, negotiate the magnitude and allocation of taxes. Taxes may increase growth if they finance public services but reduce growth when used to redistribute income between classes. The different social classes have different preferences about growth and redistribution. The resulting conflict is resolved through the tax negotiations between the political parties. I use the model to obtain empirical predictions and policy lessons about the relationship ...
Working Paper
Commitment, coordination failures, and delayed reforms
Working Paper
Credible monetary policy with long-lived agents: recursive approaches
This paper develops recursive methods that completely characterize all the time-consistent equilibria of a class of models with long-lived agents. This class is large enough to encompass many problems of interest, such as capital-labor taxation and optimal monetary policy. The recursive methods obtained are intuitive and yield useful algorithms to compute the set of all time-consistent equilibria. ; These results are obtained by exploiting two key ideas derived from dynamic programming. The first--developed by Abreu, Pearce, and Stachetti in the context of repeated games and by Spear and ...
Working Paper
Monetary policy and the currency denomination of debt: a tale of two equilibria
Exchange rate policies depend on portfolio choices, and portfolio choices depend on anticipated exchange rate policies. This opens the door to multiple equilibria in policy regimes. We construct a model in which agents optimally choose to denominate their assets and liabilities either in domestic or in foreign currency. The monetary authority optimally chooses to float or to fix the currency, after portfolios have been chosen. We identify conditions under which both fixing and floating are equilibrium policies: if agents expect fixing and arrange their portfolios accordingly, the monetary ...
Working Paper
Liquidity crises in emerging markets: Theory and policy
We build a model of financial sector illiquidity in an open economy. Illiquidity is defined as a situation in which a country's consolidated financial system has potential short-term obligations that exceed the amount of foreign currency available on short notice. We show that illiquidity is key in the generation of self-fulfilling bank and/or currency crises. We discuss the policy implications of the model and study issues associated with capital inflows and the maturity of external debt, the role of real exchange depreciation, options for financial regulation, fiscal policy, and exchange ...
Working Paper
Financial fragility and the exchange rate regime
We study financial fragility, exchange rate crises, and monetary policy in an open economy version of a Diamond-Dybvig model. The banking system, the exchange rate regime, and central bank credit policy are seen as parts of a mechanism intended to maximize social welfare; if the mechanism fails, banking crises and speculative attacks become possible. We compare currency boards, fixed rates, and flexible rates with and without a lender of last resort. A currency board cannot implement a socially optimal allocation; in addition, bank runs are possible under a currency board. A fixed exchange ...