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Financial intermediation and efficient risk sharing in two-period lived OLG models

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  • Paul Ritschel

    (University of Kaiserslautern-Landau)

  • Jan Wenzelburger

    (University of Kaiserslautern-Landau)

Abstract

This article investigates a two-period lived overlapping-generations (OLG) model that incorporates financial intermediation. A risk-neutral bank offers loan and deposit contracts that insure risk-averse agents against idiosyncratic income shocks. Agents prefer financial intermediation to capital markets if it provides efficient risk sharing. The analysis demonstrates that in any two-period lived OLG model in which productive capital is increasing in investment levels, financial intermediation, when implemented for the purpose of efficient risk sharing, cannot instigate business cycles or complex dynamics. The resulting dynamics is monotonic and qualitatively indistinguishable from the dynamics of the classical OLG model by Diamond (Am Econ Rev 55(5):1126–1150, 1965). Business cycles may only occur if banks offer inefficient contracts. Efficient contracts will, in general, not induce dynamically efficient growth paths.

Suggested Citation

  • Paul Ritschel & Jan Wenzelburger, 2024. "Financial intermediation and efficient risk sharing in two-period lived OLG models," Economic Theory Bulletin, Springer;Society for the Advancement of Economic Theory (SAET), vol. 12(1), pages 57-78, June.
    • Handle: RePEc:spr:etbull:v:12:y:2024:i:1:d:10.1007_s40505-024-00263-z
    DOI: 10.1007/s40505-024-00263-z
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    References listed on IDEAS

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    More about this item

    Keywords

    Financial intermediation; Overlapping generations; Risk sharing; Business cycles; Loan contracts;
    All these keywords.

    JEL classification:

    • D53 - Microeconomics - - General Equilibrium and Disequilibrium - - - Financial Markets
    • E32 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Business Fluctuations; Cycles
    • E44 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Financial Markets and the Macroeconomy
    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages
    • O41 - Economic Development, Innovation, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - One, Two, and Multisector Growth Models

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