Official dollarization refers to the adoption of the U.S. dollar as legal tender in place of the national currency. Some Latin American countries have recently dollarized, and others have seriously considered dollarization. This article discusses the reasons behind the surge of interest in...

This paper presents a model in which currency crises can spread across countries as a result of the self-fulfilling beliefs of market participants. An incomplete-information approach is used to overcome many undesirable features of existing multiple-equilibrium explanations of contagion. If...

We study the role of commitment in a version of the Diamond-Dybvig model with no aggregate uncertainty. As is well known, the banking authority can eliminate the possibility of a bank run by committing to suspend payments to depositors if a run were to start. We show, however, that in an...

Sunspot equilibrium and lottery equilibrium are two stochastic solution concepts for nonstochastic economies. We compare these concepts in a class of completely finite, (possibly) nonconvex exchange economies with perfect markets, which requires extending the lottery model to the finite case....

The quantity of reserves in the U.S. banking system has risen dramatically since September 2008. Some commentators have expressed concern that this pattern indicates that the Federal Reserve's liquidity facilities have been ineffective in promoting the flow of credit to firms and households....

Online appendix for the Review of Economic Dynamics article

Should policy makers be permitted to intervene during a financial crisis by bailing out financial institutions and their investors? We study this question in a model that incorporates two competing views about the underlying causes of these crises: self-fulfilling shifts in investors'...

We study a finite-depositor version of the Diamond-Dybvig model of financial intermediation in which the bank and all depositors observe withdrawals as they occur. We derive the (constrained) efficient allocation of resources in closed-form and show that this allocation provides liquidity...

Central banks have responded to the current financial crisis with an unprecendented program of lending to banks and other financial institutions. In some cases, this lending has lead to a substantial increase in the monetary base. Can such lending programs cause an increase in inflation? Is so,...

We study the Green and Lin (JET, 2003) model of financial intermediation with two new features: traders may face a cost of contacting the intermediary and consumption needs may be correlated across traders. We show that each of these features is capable of generating an equilibrium in which some...