What can be learnt from revisiting the Optimal Currency Areas (OCA) theory 50 years from its birth, in light of recent advances in open economy macro and monetary theory? This paper presents a stylized micro-founded model of the costs of adopting a common currency, relative to an ideal benchmark...

This paper provides an introduction to the recent literature on macroeconomic stabilization in closed and open economies. We present a stylized theoretical framework, and illustrate its main properties with the help of an intuitive graphical apparatus. Among the issues we discuss: optimal...

We characterize the optimal sequential choice of monetary policy in economies with either nominal or indexed debt. In a model where nominal debt is the only source of time inconsistency, the Markov-perfect equilibrium policy implies the progressive depletion of the outstanding stock of debt,...

Models of stabilization in open economy traditionally emphasize the role of exchange rates as a substitute for nominal price flexibility in fostering relative price adjustment. This view has been recently criticized on the ground that, to the extent that prices are sticky in local currency, the...

Using the results of risk-adjusted linear-quadratic-Gaussian optimal control with perfect and imperfect observation of the economy, we obtain prudent Taylor rules for monetary policies and also allow for imperfect information and cautious Kalman filters. A prudent central bank adjusts the...