This paper reviews the main policy and analytical issues related to currency substitution in developing countries. The paper discusses, first, whether currency substitution should be encouraged or not; second, how the presence of currency substitution affects the choice of nominal anchors in...

In recent years, the learnability of rational expectations equilibria (REE) and determinacy of economic structures have rightfully joined the usual performance criteria among the sought-after goals of policy design. Some contributions to the literature, including Bullard and Mitra (2001) and...

Expected exchange rate changes are determined by interest rate differentials across countries and risk premia, while unexpected changes are driven by innovations to macroeconomic variables, which are amplified by time-varying market prices of risk. In a model where short rates respond to the...

We study markets where innovators can sell ideas to entrepreneurs, who may be better at implementing them. These markets are decentralized, with random matching and bargaining. Entrepreneurs hold liquid assets lest potentially profitable opportunities may be lost. We extend existing models of...

This paper studies the long run effects of monetary policy in a micro-founded model with trading frictions and endogenous market segmentation. Agents must pay a fixed cost to participate in a centralized liquidity market. By endogenizing the participation decision, this model endogenizes the...

We study how the use of judgement or add-factors in macroeconomic forecasting may disturb the set of equilibrium outcomes when agents learn using recursive methods. We isolate conditions under which "exuberance equilibria" exist in standard macroeconomic environments. These equilibria may...

How can a particular allocation and prices be implemented? Under what conditions does a policy deliver a unique competitive equilibrium? How many degrees of freedom there are in the determination of the policy variables, or how many are the instruments of policy? In this paper we analyze a...

This paper studies a remarkable experiment in monetary policy. Because of the peculiarity of the French monetary system, the government was able to engineer overnight appreciations of the currency in terms of silver of 100% over a few months, with the explicit goal of lowering the price level....

Evidence suggests that banks, like firms, face financial frictions when raising funds. In this paper, we develop a quantitative, monetary business cycle model in which agency problems affect both the relationship between banks and firms as well as that linking banks to their depositors. As a...