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Measurement matters: Input price proxies and bank efficiency in Germany

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  • Koetter, Michael

Abstract

Most bank efficiency studies that use stochastic frontier analysis (SFA) employ each bank's own implicit input price when estimating efficient frontiers. But the theoretical foundation of most studies is a cost minimisation and/ or profit maximisation problem assuming perfect input markets. At the very least, traditional input price proxies therefore contain substantial measurement error. In this paper, we examine the magnitude and direction of this error in cost and profit efficiency (CE and PE) measurement. We suggest two input market definitions to approximate exogenous input prices alternatively and estimate CE and PE of German banks between 1993 and 2003. Our main findings are threefold. First, after accounting for systematic differences across banks, mean CE is sensitive to alternative input prices. Second, distortions of mean PE due to traditional input prices are small. Third, across CE models small cooperative banks located in large western states are identified as top performers. Large banks and those located in eastern states rank lowest.

Suggested Citation

  • Koetter, Michael, 2005. "Measurement matters: Input price proxies and bank efficiency in Germany," Discussion Paper Series 2: Banking and Financial Studies 2005,01, Deutsche Bundesbank.
  • Handle: RePEc:zbw:bubdp2:4256
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    References listed on IDEAS

    as
    1. Falko Fecht & Kevin X. D. Huang & Antoine Martin, 2008. "Financial Intermediaries, Markets, and Growth," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 40(4), pages 701-720, June.
    2. Hamerle, Alfred & Liebig, Thilo & Scheule, Harald, 2004. "Forecasting Credit Portfolio Risk," Discussion Paper Series 2: Banking and Financial Studies 2004,01, Deutsche Bundesbank.
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    Cited by:

    1. Bader, Mohammed Khaled I. & Mohamad, Shamsher & Ariff, Mohamed & Hassan, Taufiq, 2008. "Cost, Revenue, And Profit Efficiency Of Islamic Versus Conventional Banks: International Evidence Using Data Envelopment Analysis," Islamic Economic Studies, The Islamic Research and Training Institute (IRTI), vol. 15, pages 24-76.
    2. Md Zobaer Hasan & Anton Abdulbasah Kamil & Adli Mustafa & Md Azizul Baten, 2012. "A Cobb Douglas Stochastic Frontier Model on Measuring Domestic Bank Efficiency in Malaysia," PLOS ONE, Public Library of Science, vol. 7(8), pages 1-5, August.
    3. Hasan, Iftekhar & Koetter, Michael & Wedow, Michael, 2009. "Regional growth and finance in Europe: Is there a quality effect of bank efficiency?," Journal of Banking & Finance, Elsevier, vol. 33(8), pages 1446-1453, August.
    4. Chunxia Jiang & Shujie Yao, 2010. "Banking Reform and Efficiency in China: 1995-2008," Discussion Papers 10/11, University of Nottingham, GEP.

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    More about this item

    Keywords

    Germany; Banks; cost efficiency; profit efficiency; stochastic frontier analysis; measurement error;
    All these keywords.

    JEL classification:

    • C51 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Model Construction and Estimation
    • L11 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Production, Pricing, and Market Structure; Size Distribution of Firms
    • G20 - Financial Economics - - Financial Institutions and Services - - - General

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