Standard-Nutzungsbedingungen:Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden.Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen.Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, gelten abweichend von diesen Nutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte. Terms of use: Documents in ECB-CFS RESEARCH NETWORK ON CAPITAL MARKETS AND FINANCIAL INTEGRATION IN EUROPEIn 2004 all publications will carry a motif taken from the €100 banknote. WO R K I N G PA P E R S E R I E SN ECB-CFS Research Network on "Capital Markets and Financial Integration in Europe"This paper is part of the research conducted under the ECB-CFS Research Network on "Capital Markets and Financial Integration in Europe". The Network aims at stimulating top-level and policy-relevant research, significantly contributing to the understanding of the current and future structure and integration of the financial system in Europe and its international linkages with the United States and Japan. After two years of work, the ECB Working Paper Series is issuing a selection of papers from the Network. This selection is covering the priority areas "European bond markets", "European securities settlement systems", "Bank competition and the geographical scope of banking activities", "international portfolio choices and asset market linkages" and "start-up financing". It also covers papers addressing the impact of the euro on financing structures and the cost of capital.The Network brings together researchers from academia and from policy institutions. It has been guided by a Steering Committee composed of Franklin Allen (University of Pennsylvania), Giancarlo Corsetti (European University Institute), Jean-Pierre Danthine (University of Lausanne), Vitor Gaspar (ECB), Philipp Hartmann (ECB), Jan Pieter Krahnen (Center for Financial Studies) and Axel Weber (CFS). Mario Roberto Billi, Bernd Kaltenhäuser (both CFS), Simone Manganelli and Cyril Monnet (both ECB) supported the Steering Committee in its work. Jutta Heeg (CFS) and Sabine Wiedemann (ECB) provided administrative assistance in collaboration with staff of National Central Banks acting as hosts of Network events. Further information about the Network can be found at http://www.eu-financial-system.org. C O N T E N T S Abstract 4Non-technical summary 5

This paper addresses a very European issue, the consolidation of securities trading and settlement infrastructures. In a two-country model, we analyze welfare implications of different types of consolidation. We find that in our model, full technical horizontal integration of settlement systems is better than vertical integration of exchanges and settlement systems, but vertical integration is still better than no consolidation. These findings have clear policy implications with regards to the highly fragmented European securities infrastructure.

In 2011 all ECB publications feature a motif taken from the €100 banknote.

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