On measuring concentration in banking systems

被引：27

作者：

Alegria, Carlos ^{[1
]}

Schaeck, Klaus ^{[2
]}

机构：

[1] Winton Capital Management, Oxford OX4 4GA, England

[2] Cass Business Sch, Fac Finance, London EC1Y 8TZ, England

来源：

FINANCE RESEARCH LETTERS | 2008年 / 5卷 / 01期

关键词：

Zipf's law; Concentration indices; Banking;

D O I：

10.1016/j.frl.2007.12.001

中图分类号：

F8 [财政、金融];

学科分类号：

0202 ;

摘要：

Assuming a Pareto-type distribution of bank sizes, we investigate the effect of changes in Zipf's exponent (alpha) and the sample size on the behavior of different concentration indices, such as the 3-bank concentration ratio, the Herfindahl-Hirschman index and the top 5%-concentration ratio. We derive analytical relations between these concentration indices and investigate the elasticity of these indices to changes in a and in the sample size N. We show different regimes under which each index can be used most appropriately. Our results are highly relevant for policymakers who rely on such concentration measures to derive public policy recommendations in banking. (c) 2008 Elsevier Inc. All rights reserved.

引用

页码：59 / 67

页数：9

共 14 条

[1] Zipf distribution of US firm sizes [J].