The global financial crisis of 2008-09 has sent public debt on sharply higher trajectories. With the economic recovery gradually taking hold, the focus is now shifting to fiscal "exit" strategies. Medium-term consolidation efforts are likely to include not only tax increases but also sizeable...

This paper analyzes the impact of strained government finances on macroeconomic stability and the transmission of fiscal policy. Using a variant of the model by Curdia and Woodford (2009), we study a 'sovereign risk channel' through which sovereign default risk raises funding costs in the...

This paper examines how supply-side policies may play a role in fighting a low aggregate demand that traps an economy at the zero lower bound (ZLB) of nominal interest rates. Future increases in productivity or reductions in mark-ups triggered by supply-side policies generate a wealth effect...

The recent literature on monetary policy in the presence of a zero lower bound on interest rates has shown that forward guidance regarding the path of interest rates can be very effective in preserving macroeconomic stability in the face of a contractionary demand shock; moreover, that...

This paper estimates a monetary policy reaction function for the ECB over the period 1999-2009. To allow for a potential shift in interest rate setting during the financial crisis, we permit a smooth transition from one set of parameters to another. The estimates show a swift change in the...

This paper explains the key factors that determine the effectiveness of government purchases as a means of increasing output and employment in New Keynesian models, through a series of simple examples that can be solved analytically. Delays in the adjustment of prices or wages can allow for...

The paper discusses some fundamental problems in monetary economics associated with the determination and role of the numéraire. The issues are introduced by formalising a proposal, attributed to Eisler, to remove the zero lower bound on nominal interest rates by unbundling the numéraire and...

We study ECB’s interest rate setting in 1999-2010 using a reaction function in which forecasts of future economic growth and inflation enter as regressors. Allowing for a gradual switch between two reaction functions, we detect a shift after Lehman Brothers failed in September 2008 when the...

This paper has three parts. Part 1 constructs a classical economic model of inflation, augmented by a complete set of financial markets; I call this the core monetary model. Part 2 develops a series of calibrated examples to illustrate how the core monetary model explains the history of...

Government spending at the zero lower bound (ZLB) is not necessarily welfare enhancing, even when its output multiplier is large. When government spending provides direct utility to the household, its optimal level is at most 0.5-1 percent of GDP for recessions of -4 percent; the numbers are...