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...

We evaluate the desirability of having an elastic currency generated by a lender of last resort that prints money and lends it to banks in distress. When banks cannot borrow, the economy has a unique equilibrium that is not Pareto optimal. The introduction of unlimited borrowing at a zero...

We examine optimal discount window policy in an economy with a linear investment technology and aggregate liquidity shocks. Unrestricted lending at the discount window prevents large shocks from causing banking crises, but leads to indeterminacy of stationary equilibrium. We show how a policy of...

We study sunspot immunity in a dynamic monetary economy in which consumers are allowed to trade put and call option contracts on the general price level. We define the concept of strong sunspot immunity to characterize economies that have no sunspot equilibria regardless of the number of...

We study the consequences of a central bank providing an elastic currency through the use of discount window lending. In particular, we compare the set of equilibria generated when the interest rate is fixed in nominal terms with that generated when it is fixed in real terms. The two policies...