Suchergebnisse

Defence date: 24 November 2020 ; Examining Board: Prof. Evi Pappa (University Carlos III of Madrid); Prof. Leonardo Melosi (European University Institute and Federal Reserve Bank of Chicago); Prof. John Fernald (INSEAD and Federal Reserve Bank of San Francisco); Prof. Antonella Trigari (Bocconi University) ; The three chapters of this thesis are inspired by some aspects of the complex world where we live in. The first chapter uncovers the role of firms' hiring decisions as a key source of state dependence in the fiscal spending multiplier. When the hiring rate is high, a larger share of workers has to be relocated from production to recruitment and training of the new hires. This diversion of resources lowers firms' productivity and reduces the effect of government spending stimulus on output. I establish this result using local projections and I illustrate this mechanism building a non-linear dynamic general equilibrium model. The second chapter, joint with Joonseok Oh, shows how uninsurable unemployment risk is crucial to qualitatively and quantitatively match macro responses to uncertainty shocks. Empirically, uncertainty shocks i) generate deflationary pressure; ii) have considerably negative consequences on economic activity; iii) produce a drop in aggregate consumption, which is mainly driven by the response of the households in the bottom 60% of the income distribution. Standard representative-agent New Keynesian models have difficulty to deliver these effects. A heterogeneous-agent framework with search and matching frictions and Calvo pricing allows us to jointly attain these results. Uncertainty shocks induce households' precautionary saving and firms' precautionary pricing behaviors, triggering a fall in aggregate demand and supply. These precautionary behaviors increase the unemployment risk of the imperfectly insured households, who strengthen precautionary saving. When the feedback loop between unemployment risk and precautionary saving is strong enough, a rise in uncertainty leads to i) a drop in action; ii) amplified negative responses of macro variables; iii) heterogeneous consumption responses of households, which are consistent with the empirical evidence. The third chapter, joint with Alessandro Ferrari, empirically evaluates whether adopting a common currency has changed the ability of euro area member states to share risk. We construct a counterfactual dataset of macroeconomic variables through the synthetic control method. We then use the output variance decomposition of Asdrubali, Sorensen and Yosha (1996) on both the actual and the synthetic data to study if there has been a change in risk sharing and through which channels. We find that the euro has reduced consumption smoothing. We further show that this reduction is mainly driven by the periphery countries of the euro area who have experienced a decrease in risk sharing through private credit. ; -- 1. Fiscal multipliers : a tale from the labor market -- 2. Macro uncertainty and unemployment risk -- 3. Risk sharing and the adoption of the euro ; Chapter 2 'Macro uncertainty and unemployment risk' of the PhD thesis draws upon an earlier version published as EUI ECO WP 2019/02 and Chapter 3 'Risk sharing and the adoption of the Euro' of the PhD thesis draws upon an earlier version published as ESM Working Paper Series 17/2016 and as ADEMU Working Paper Series 2017/055.

Paper presented at ADEMU (A Dynamic Economic and Monetary Union) conference co-organised by the ESM in May 2016 ; This paper aims at empirically assessing the effect of the adoption of the euro on the ability of euro area member states to smooth consumption and share risk. With the objective of evaluating the economic performance of euro area countries in the scenario where the euro had not been adopted, we construct a counterfactual dataset of macroeconomic variables via the Synthetic Control Method. In order to get some preliminary measures of risk sharing, we first compute bilateral consumption correlations and Brandt-Cochrane- Santa Clara Indexes across euro area member states. We then decompose risk sharing in different channels by means of the Asdrubali, Sorensen and Yosha (1996) output decomposition. Our preliminary measures and our decomposition of risk sharing are computed with both actual and synthetic data so as to identify whether there has been any effect of the adoption of the euro on risk sharing and through which channels it has occurred. We find that the euro has not affected the level of risk sharing across euro area countries, but has partially reduced the ability of member states to smooth consumption. We attribute this change to the higher GDP growth generated by the adoption of the euro, which has been accompanied by a greater output volatility. We also report differential effects for core and periphery countries, showing that the former have not suffered any negative effects from the adoption of the euro in terms of risk sharing. ; This project is related to the research agenda of the ADEMU project, "A Dynamic Economic and Monetary Union". ADEMU is funded by the European Union's Horizon 2020 Program under grant agreement N° 649396 (ADEMU).

This paper aims at empirically assessing the effect of the adoption of the euro on the ability of euro area member states to smooth consumption and share risk. With the objective of evaluating the economic performance of euro area countries in the scenario where the euro had not been adopted, we construct a counterfactual dataset of macroeconomic variables via the Synthetic Control Method. In order to get some preliminary measures of risk sharing, we compute correlations between consumption and GDP within a country, bilateral consumption correlations, and Brandt-Cochrane-Santa Clara indices across euro area member states. We then decompose risk sharing in different channels by means of the Asdrubali, Sorensen and Yosha (1996) output variance decomposition. Our difference in difference estimates show that the euro has not affected the level of international risk sharing across euro area countries, but has partially reduced the ability of member states to smooth consumption. We attribute this change to the higher GDP growth generated by the adoption of the euro, which has been accompanied by a greater output volatility. We also report differential effects for euro area core and periphery countries, showing that the former have not suffered any negative effect from the adoption of the euro in terms of risk sharing whereas the latter are now less able to smooth consumption. ; The ADEMU Working Paper Series is being supported by the European Commission Horizon 2020 European Union funding for Research & Innovation, grant agreement No 649396.