Standard New Keynesian models deliver puzzling results at the effective lower bound of short-term interest rates: greater price flexibility amplifies the fall in output in response to adverse demand shocks; labour tax cuts are contractionary; the multipliers of wasteful government spending are...

This paper argues that shocks increasing macroeconomic uncertainty negatively affect economic activity not only in the short but also in the long run. In a sticky-price DSGE model with endogenous growth through investment in R&D, uncertainty shocks lead to a short-term fall in demand because of...

Long-term asset purchases carried out by central banks increase the consumption volatility of households holding long-term debt. For this reason, monetary authorities should not just aim at stabilising inflation and the output gap but also mitigate the volatility of their balance sheet. In...

This paper revisits the paradox of flexibility, i.e., the result that, in a liquidity trap, greater price flexibility amplifies output volatility in response to negative demand shocks. We argue this paradox is the consequence of a failure of standard models to correctly characterize monetary...

Banking crises have severe short and long‑term consequences. We develop a general equilibrium model with financial frictions and endogenous growth in which macroprudential policy supports economic activity and productivity growth by strengthening bank’s resilience to adverse financial...

In this paper, we analyse the effects of a shock to global financial uncertainty and risk aversion on real economic activity. To this end, we extract a common factor from the realised volatilities of about 1,000 risky asset returns from around the world. We then study how shocks to the factor...