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External economies in banking

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  • Sherrill Shaffer

Abstract

Purpose - The purpose of this paper is to provide the first empirical study of external economies (agglomeration economies) in the banking industry. Design/methodology/approach - The author extends a standard specification of banking costs to control for community and market characteristics. Findings - Banks' costs are a decreasing function of the number of rival banks and an increasing function of market population. Estimated magnitudes of these effects, modest at the bank level, are large in aggregate. Multimarket operation of rival banks is also important. Originality/value - These findings suggest a previously unrecognized cost-side benefit of structure-based antitrust policies, and have additional implications for public policy toward banking structure, as well as calling for a re-interpretation of previous studies of scale economies, cost efficiency, and price-cost margins in banking.

Suggested Citation

  • Sherrill Shaffer, 2012. "External economies in banking," Journal of Financial Economic Policy, Emerald Group Publishing, vol. 4(4), pages 354-365, November.
  • Handle: RePEc:eme:jfeppp:v:4:y:2012:i:4:p:354-365
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    1. repec:bla:ecnote:v:46:y:2017:i:3:p:527-554 is not listed on IDEAS

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