Otero González, LuisSobhi Razia, Alaa2017-01-172017-01-172016http://hdl.handle.net/10347/15079This thesis explores three important topics which contribute to the study of bank efficiency, competition, profitability and financial stability. In the Chapter 2 “The Impact of Bank Competition on Risk-Taking: the case of MENA countries”, we empirically analyze the effect of bank competition and other determinants on risk-taking for banks in MENA countries. Next Chapter 3 “Determinants of bank efficiency in MENA countries”, measures cost efficiency, and empirically analyzes the factors that affect bank efficiency. Finally, in the Chapter 4 “Market Structure, Performance, and Efficiency of the MENA Banking Sector”, we test the four competing hypotheses that explain bank performance (SCP, RMP, ES and QLH). The chapters are independent of each other in terms of theoretical grounding and methodology but complement each other by investigating the three different angles related.engEsta obra atópase baixo unha licenza internacional Creative Commons BY-NC-ND 4.0. Calquera forma de reprodución, distribución, comunicación pública ou transformación desta obra non incluída na licenza Creative Commons BY-NC-ND 4.0 só pode ser realizada coa autorización expresa dos titulares, salvo excepción prevista pola lei. Pode acceder Vde. ao texto completo da licenza nesta ligazón: https://creativecommons.org/licenses/by-nc-nd/4.0/deed.glhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.glEficiencia bancariaCompetenciaRentabilidadEstabilidad financieraMaterias::Investigación::53 Ciencias económicas::5303 Contabilidad económica::530301 Contabilidad financieraMaterias::Investigación::53 Ciencias económicas::5306 Economía del cambio tecnológicoMaterias::Investigación::53 Ciencias económicas::5309 Organización industrial y políticas gubernamentales::530905 Monopolio y competenciadoctoral thesisopen access