This paper reviews the extensive theoretical and empirical literature on currency substitution. After discussing the ambiguity surrounding the definition of currency substitution, the paper illustrates the causes of substitutability of different currencies using a cash-in-advance model and a...

The literature has not being able to identify clear-cut real effects of exchange-rate regimes on output growth. Similarly, no definitive view emerges from the literature in regard to the effects of open capital markets on macroeconomic performance. The paper attributes the failure of the...

Financial contagion and Sudden Stops of capital inflows experienced in emerging-markets crises may originate in an explosive mix of lack of policy credibility and world capital market imperfections that afflict emerging economies with national currencies. Hence, this paper argues that abandoning...

How accurate is a log-linear approximation of the New Keynesian model when the nominal interest rate is bounded by zero? This paper compares the solution of the exact non-linear model to the log-linear approximation. It finds that the difference is modest. This applies even for extreme events in...

The paper examines possible monetary policy strategies for Latin America that may help lock-in the gains in the fight against inflation attained by the region during the 1990s. We start by calling for a refocus of the debate about the conduct of monetary policy away from thinking that it is...

This paper pushes back against two views about the effects of dollarization. First, there is a view that the dollar is a device by which rich countries provide business cycle insurance to emerging market (EME) countries. We find that the dollar is important for risk sharing, but the evidence...

The paper explores optimizing models of small open economies that hold foreign money balances. Particular attention is paid to the impact of foreign inflation on the real exchange rate and other real variables. At first, an environment in which foreign money is the only traded asset is explored....

Undesirable real effects have been attributed to floating exchange rates in general, and the 1980-83 appreciation of the dollar in particular.In the appreciating country, the U.S., export industries lose competitiveness and so output falls. In the other country, say Europe, the exchange rate...

This paper is concerned with the reasons why some currencies, such as the pound sterling and the U.S. dollar, have come to serve as "vehicles" for exchanges of other currencies. It develops a three-country model of payments equilibrium with transaction costs, and shows how one currency can...

This paper studies the dollarization of prices in retail markets of emerging economies. We develop a model of the firm's optimal currency choice in retail markets in inflationary economies. We derive theoretical predictions regarding the optimality of dollar pricing, and test them using data...