Defence date: 7 June 2019Examining Board: Prof. Evi Pappa, Universidad Carlos III Madrid, (Supervisor); Prof. Juan Dolado, Universidad Carlos III Madrid; Prof. Steven Ongena, University of Zurich; Prof. Saverio Simonelli, University of Naples Federico IIUnderstanding the propagation of shocks throughout the economy is crucial for the design of policies and for their evaluation. Shock propagation hinges on a number of factors, among which market structure and the level of competition play a relevant role. In this dissertation I investigate the role of competition on firms’ pricing behavior and on banks’ funding stability when hit by a shock. Moreover, I also assess the implications of greater capital requirements on banks’ liquidity prov...