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An empirical investigation of the effects of concentration on profitability among US banks

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  • Fiona, Tregenna

Abstract

This paper analyses the effects of concentration on profitability in the US banking sector from 1994-2005, using bank-level panel data. A new index of concentration is proposed, which reflects the depth and intensity of concentration. The econometric specification facilitates the simultaneous testing of the four main hypotheses in the literature concerning the relationship between concentration and profitability. Strong support is found for the Structure-Conduct-Performance hypothesis, as well as some support for the Relative Market Power hypothesis. The results are robust to alternative econometric techniques and specifications, and to various measures of profitability and of concentration. Further analysis sheds light on the nature and possible channels of the concentration-profitability relationship. A positive relationship is found between concentration and profitability even when the largest banks are excluded from the sample, suggesting that the relationship between concentration and profitability may act in a generalised structural way. In addition to very large banks, large banks and small banks also appear to benefit from concentration, but with no clear advantages to lower-middle-sized banks. Analysis of the effects of concentration on the components of profitability suggests that concentration may raise both interest and non-interest revenue, and reduce both interest and non-interest costs. Furthermore, concentration appears to depress bank deposit interest rates and raise both lending rates and the interest rate spread. This suggests that bank concentration might have negative effects on savings, investment, and growth.

Suggested Citation

  • Fiona, Tregenna, 2006. "An empirical investigation of the effects of concentration on profitability among US banks," MPRA Paper 13731, University Library of Munich, Germany, revised 2009.
  • Handle: RePEc:pra:mprapa:13731
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    File URL: https://mpra.ub.uni-muenchen.de/13731/1/MPRA_paper_13731.pdf
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    References listed on IDEAS

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    Cited by:

    1. Hakimi, Abdelaziz & Hamdi, Helmi & Djlassi, Mouldi, 2013. "Testing the concentration-performance relationship in the Tunisian banking sector," MPRA Paper 55927, University Library of Munich, Germany, revised 2013.

    More about this item

    Keywords

    banks; financial institutions; profitability; concentration; competition; market structure;

    JEL classification:

    • L11 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Production, Pricing, and Market Structure; Size Distribution of Firms
    • L10 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - General
    • O16 - Economic Development, Innovation, Technological Change, and Growth - - Economic Development - - - Financial Markets; Saving and Capital Investment; Corporate Finance and Governance
    • G34 - Financial Economics - - Corporate Finance and Governance - - - Mergers; Acquisitions; Restructuring; Corporate Governance
    • D40 - Microeconomics - - Market Structure, Pricing, and Design - - - General
    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages

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