The paper studies the macroeconomic effects of government spending shocks in an economy characterized by positive trend growth. It shows that the lower is the trend growth rate the less inflationary are government spending shocks and vice versa. Moreover, on impact output is higher but exhibits...

The paper examines the effect of trend productivity growth on the determinacy and learnability of equilibria under alternative monetary policy rules. It shows that under a policy rule that responds to current period inflation and the output gap a higher trend growth rate relaxes the conditions...

We analyze optimal monetary policy when a central bank has to learn about an unknown coefficient that determines the effect of surprise inflation on aggregate demand. We derive the optimal policy under active learning and compare it to two limiting cases-certainty equivalence policy and...

We analyze determinacy and stability under learning (E-stability) of rational expectations equilibria in the Blanchard and Galí (2006, 2008) New-Keynesian model of inflation and unemployment, where labor market frictions due to costs of hiring workers play an important role. We derive results...

In this paper we incorporate the term structure of interest rates into a standard inflation forecast targeting framework.Learning about the transmission process of monetary policy is introduced by having heterogeneous agents - ie central bank and private agents - who have different information...

In this paper we analyze disinflation policy when a central bank has imperfect information about private sector inflation expectations but learns about them from economic outcomes, which are in part the result of the disinflation policy. The form of uncertainty is manifested as uncertainty about...

[Concluding remarks] The financial crisis has rendered conventional monetary policy (of major central banks) powerless. Unconventional monetary policy, in the form of forward guidance and quantitative easing, has taken center stage. Recent moves in financial markets have challenged the notion...

We analyze Ramsey optimal monetary policy in a New-Keynesian model with search and matching fric- tions featuring (i) training costs due to skill loss from long-term unemployment and (ii) endogenous growth through learning-by-doing externalities. In a simplified two-period version of the model,...