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Welfare effects of financial integration

  • Hartmann, Philipp
  • Grüner, Hans Peter
  • Fecht, Falko

This paper compares four forms of inter-regional financial risk sharing: (i) segmentation, (ii) integration trough the secured interbank market, (iii) integration trough the unsecured interbank market, (iv) integration of retail markets. The secured interbank market is an optimal risk-sharing device when banks report liquidity needs truthfully. It allows diversification without the risk of cross-regional financial contagion. However, free-riding on the liquidity provision in this market restrains the achievable risk-sharing as the number of integrated regions increases. In too large an area this moral hazard problem becomes so severe that either unsecured interbank lending or, ultimately, the penetration of retail markets is preferable. Even though this deeper financial integration entails the risk of contagion it may be beneficial for large economic areas, because it can implement an efficient sharing of idiosyncratic regional shocks. Therefore, the enlargement of a monetary union, for example, extending the common interbank market might increase the benefits of also integrating retail banking markets through cross-border transactions or bank mergers.

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Paper provided by Deutsche Bundesbank, Research Centre in its series Discussion Paper Series 2: Banking and Financial Studies with number 2007,11.

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Date of creation: 2007
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Handle: RePEc:zbw:bubdp2:6154
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  1. Yaron Leitner, 2005. "Financial Networks: Contagion, Commitment, and Private Sector Bailouts," Journal of Finance, American Finance Association, vol. 60(6), pages 2925-2953, December.
  2. Rene M. Stulz, 2005. "The Limits of Financial Globalization," NBER Working Papers 11070, National Bureau of Economic Research, Inc.
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  5. Rochet, Jean-Charles & Tirole, Jean, 1996. "Interbank Lending and Systemic Risk," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 28(4), pages 733-62, November.
  6. Freixas, Xavier & Parigi, Bruno M & Rochet, Jean-Charles, 2000. "Systemic Risk, Interbank Relations, and Liquidity Provision by the Central Bank," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 32(3), pages 611-38, August.
  7. Freixas, X. & Holthausen, C., 2001. "Interbank Market Integration under Asymmetric Information," Papers 74, Quebec a Montreal - Recherche en gestion.
  8. Douglas W. Diamond & Raghuram G. Rajan, 2002. "Liquidity Shortages and Banking Crises," NBER Working Papers 8937, National Bureau of Economic Research, Inc.
  9. Franklin Allen & Douglas Gale, 2000. "Financial Contagion," Journal of Political Economy, University of Chicago Press, vol. 108(1), pages 1-33, February.
  10. Bhattacharya, Sudipto & Fulghieri, Paolo, 1994. "Uncertain liquidity and interbank contracting," Economics Letters, Elsevier, vol. 44(3), pages 287-294.
  11. Lieven Baele, 2004. "Measuring European Financial Integration," Oxford Review of Economic Policy, Oxford University Press, vol. 20(4), pages 509-530, Winter.
  12. Hans Degryse, 2004. "The Impact of Technology and Regulation on the Geographical Scope of Banking," Oxford Review of Economic Policy, Oxford University Press, vol. 20(4), pages 571-590, Winter.
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