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Concurrence imparfaite et stratégie bancaire

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  • Jean-Charles Rochet

Abstract

[fre] Concurrence imparfaite et stratégie bancaire. . Nous modélisons les comportements des banques commerciales en utilisant la méthodologie des jeux séquentiels. Nous distinguons trois types de stratégies:. - les stratégies de court terme (activités de marché) ;. - les stratégies de moyen terme (activités clientèle) ;. - les stratégies de long terme (investissements physiques).. Les principaux résultats obtenus sont les suivants :. -contrairement aux résultats de Pyle-Hart Jaffee, les portefeuilles de titres détenus à l'équilibre par les banques sont hétérogènes et peuvent se décomposer en portefeuilles de couverture (liés à l'activité clientèle) et en portefeuilles de placement ;. -les parts de marché dans l'activité clientèle (dépôts et crédits) sont croissantes avec les investissements physiques réalisés et décroissantes avec le coefficient d'aversion au risque des actionnaires ;. -les équilibres de long terme sont en général asymétriques, certaines banques choisissant des investissements physiques importants, alors que d'autres se contentent d'investissements minimaux. [eng] Imperfect competition and banking strategy J.-C. Rochet. . We model banking competition through a sequential game, with three types of strategies : . - portfolio activities . - deposits and loans activities (medium run) . - physical investments (long run) . Our main results are the following : . - contrarily to the classical results of Pyle-Hart Jaffee, banks hold heteregenous portfolios which can be split into hedging portfolios (linked to the deposits and loans activity) and investment portfolios. . -market shares in deposits and loans increase with physical investments and decrease with risk aversion of banks. . -long run equilibria are in general asymmetric.

Suggested Citation

  • Jean-Charles Rochet, 1992. "Concurrence imparfaite et stratégie bancaire," Revue Économique, Programme National Persée, vol. 43(2), pages 261-276.
    • Handle: RePEc:prs:reveco:reco_0035-2764_1992_num_43_2_409352
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    References listed on IDEAS

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    1. Avner Shaked & John Sutton, 1982. "Relaxing Price Competition Through Product Differentiation," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 49(1), pages 3-13.
    2. Hahn, F H, 1971. "Equilibrium with Transaction Costs," Econometrica, Econometric Society, vol. 39(3), pages 417-439, May.
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    4. Oliver D. Hart & Dwight M. Jaffee, 1974. "On the Application of Portfolio Theory to Depository Financial Intermediaries," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 41(1), pages 129-147.
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    6. Heggestad, Arnold A, 1977. "Market Structure, Risk and Profitability in Commercial Banking," Journal of Finance, American Finance Association, vol. 32(4), pages 1207-1216, September.
    7. David M. Kreps & Jose A. Scheinkman, 1983. "Quantity Precommitment and Bertrand Competition Yield Cournot Outcomes," Bell Journal of Economics, The RAND Corporation, vol. 14(2), pages 326-337, Autumn.
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    Cited by:

    1. Emmanuelle Nys, 2008. "Service provision and loans : Price and risk implications," Revue d'économie politique, Dalloz, vol. 118(3), pages 411-428.
    2. Franck Martin, 1995. "Concurrence bancaire, jeux séquentiels et information complète," Revue Économique, Programme National Persée, vol. 46(2), pages 301-324.

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