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In this thesis, I study from various angles how uncertainty affects macroeconomic activity. Chapter 1 investigates the effects of uncertainty shocks on economic activity in the euro area by means of a Dynamic Stochastic General Equilibrium (DSGE) model with heterogenous agents and a stylized banking sector. We show that frictions in credit supply amplify the effects of uncertainty shocks on economic activity. This amplification channel stems mainly from the stickiness in bank loan rates. This stickiness reduces the effectiveness in the transmission mechanism of monetary policy. In chapter 2, I provide empirical evidence that uncertainty shocks have strong asymmetric effects on economic activ...
In this paper we investigate the effects of uncertainty shocks on economic activity in the euro area by using a Dynamic Stochastic General Equilibrium (DSGE) model with heterogenous agents and a stylized banking sector. We show that frictions in credit supply amplify the effects of uncertainty shocks on economic activity. This amplification channel stems mainly from the stickiness in banking retail interest rates. This stickiness reduces the effectiveness in the transmission mechanism of monetary policy.