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The granularity of the Brazilian banking market
Institution:1. Graduate Program in Economics, Federal University of Santa Catarina, 88049-970 Florianopolis S.C., Brazil;2. Department of Economics, Federal University of Santa Catarina, 88049-970 Florianopolis S.C., Brazil;3. Department of Statistics, University of Brasilia, 70910-900 Brasilia, D.F., Brazil;4. Graduate Program in Business Administration, University of Brasilia, 70910-900 Brasilia D.F., Brazil;5. Graduate Program in Economics, Federal University of Espirito Santo, 29075-910 Vitoria E.S., Brazil;1. Institute of Business and Management, National Yang Ming Chiao Tung University, 118 Chung-Hsiao West Road, Section 1, Taipei, Taiwan;2. Graduate Institute of Finance, National Taiwan University of Science and Technology, 43, Keelung Rd., Section 4, Taipei, Taiwan;3. Center for General Education, Chung Yuan Christian University, 200 Chung Pei Road, Chung Li District, Taoyuan City, Taiwan;4. Science and Technology Policy Research and Information Center, National Applied Research Laboratories, 106 Heping East Road, Section 2, Taipei, Taiwan;5. Power Generation Division, Taiwan Power Company, 242, Roosevelt Road, Section 3, Taipei, Taiwan
Abstract:Bank size distributions concentrate in a few large banks – the big “grains.” This fact means idiosyncratic shocks at the bank level do not cancel out, thus affecting the business cycle. Here, we present evidence of granularity in the banking market using Brazilian data. We examine the explanatory power of the granular banking residual of the five largest banks on quarterly GDP changes from 2010 to 2019. We conservatively find that shocks to revenues of these top five banks explain nearly one-fifth of GDP fluctuations.
Keywords:Granularity  Banking market structure  Granular banking residual  Power law  G21  E44  E32
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