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Do Large Banks Have Lower Costs? New Estimates of Returns to Scale for U.S. Banks

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  • DAVID C. WHEELOCK
  • PAUL W. WILSON

Abstract

This paper presents new, fully nonparametric estimates of ray‐scale and expansion‐path scale economies for U.S. banks based on a model of bank costs. Unlike prior studies that use models with restrictive parametric assumptions or limited samples, our methodology uses local polynomial estimators and data on all U.S. banks over the period 1984–2006. Our estimates indicate that as recently as 2006, most U.S. banks faced increasing returns to scale, suggesting that scale economies are a plausible (but not necessarily only) reason for the growth in average bank size and that the tendency toward increasing scale is likely to continue unless checked by government intervention.
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  • David C. Wheelock & Paul W. Wilson, 2012. "Do Large Banks Have Lower Costs? New Estimates of Returns to Scale for U.S. Banks," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 44(1), pages 171-199, February.
    • Handle: RePEc:mcb:jmoncb:v:44:y:2012:i:1:p:171-199
    DOI: j.1538-4616.2011.00472.x
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