This paper proposes a tractable New Keynesian (NK) economy with endogenous adjustment in product quality that nests the canonical framework. Endogenous quality choice reduces the slope of the traditional NK Phillips curve and ampliffes the economy's response to productivity shocks. This leads to...

We study how determinacy and expectational stability (E-stability) of rational expectations equilibrium may be affected by monetary policy when the cost channel of monetary policy matters. We focus on both instrumental Taylor-type rules and optimal target rules. We show that standard instrument...

This study shows that an expectations-based optimal policy rule has desirable properties in a standard macroeconomic model incorporating a cost channel for monetary disturbances and inflation rate expectations that are partly backwardlooking. Specifically, optimal monetary policy under...

This paper develops a model of monetary policy in which the central banker can acquire costly information about a supply shock. It is shown that, with this assumption, it may be optimal for society to delegate to a "weight-liberal" central banker, a result which contrasts with that of Rogoff...

This paper studies the optimal nominal policy interest rate in a model with the cost channel and imperfect competition in the banking sector. Due to this market power, the interest rate on deposits is relatively low; in particular it is lower than the policy interest rate. This, in turn, leads...

We propose a price-setting model which helps reconcile microeconomic evidence of relatively frequent and large price changes with persistent real effects of monetary shocks. In our model, both price adjustments and the gathering of some types of information are costly, requiring the payment of a...

This paper examines how the preferences of a large economy's central bank affect the trade-off between output and inflation volatility faced by the central bank of a small open economy by analysing the impact of a global cost-push shock. We demonstrate that under the assumption of producer...