The solution to a linear model in which supply and/or demand depends on rational expectations of future prices can involve three parts, which we denote as the fundamental component, the deterministic bubble component, and the stochastic bubble component. This paper explores the properties of...

This paper analyzes the possible inception of rational inflationary bubbles under the assumption that the empirically relevant environment precludes the existence of rational deflationary bubbles. The analysis shows that if a rational inflationary bubble exists, then it must have started on the...

This paper analyzes the theoretical possibility of rationalbubbles in stock prices in a model in which stockholders haveinfinite planning horizons and in which free disposal of equityrules out the existence of negative rational bubbles. Theanalysis shows that in this framework if a positive...

The recent financial crisis has highlighted the interconnectedness between macroeconomic and financial stability and has raised the question of whether and how to combine the corresponding main policy instruments (interest rate and bank-capital requirements). This paper offers a characterization...

Inflation has fallen dramatically in countries like Spain and Italy over the last decade, but the rate of increase in "home good" prices remains stubbornly higher than the rate of increase in "traded good" prices. The paper begins by showing that this discrepancy can be explained (at least in...

This paper incorporates banks as well as frictions in the market for bank capital into a standard New Keynesian model and considers the positive and normative implications of various financial shocks. It shows that the frictions matter significantly for the effects of the shocks and the...

Durante la ultima decada se ha producido una disminucion sustancial de la tasa de inflacion en paises como España o Italia. Sin embargo, dicho comportamiento esconde un fenomeno de inflacion dual: la tasa de crecimiento de los precios en el sector de bienes no comerciables se ha situado de...

Formation of the Euro area raises new questions about the coordination of monetary and fiscal policy. Using a New Neoclassical Synthesis (NNS) model, we show that a common monetary policy, responding to area-wide aggregates, has asymmetric effects on countries within the union, depending on...

We calculate the welfare cost of nominal inertia in a New Neoclassical Synthesis model with wage and price stickiness, capital formation, and empirically estimated rules for government spending and the cental bank's interest rate policy. We calibrate our model to U.S. data, and we show that it...