Handbook of Competition in Banking and Finance
Show Less

Handbook of Competition in Banking and Finance

Edited by Jacob A. Bikker and Laura Spierdijk

For academics, regulators and policymaker alike, it is crucial to measure financial sector competition by means of reliable, well-established methods. However, this is easier said than done. The goal of this Handbook is to provide a collection of state-of-the-art chapters to address this issue. The book consists of four parts, the first of which discusses the characteristics of various measures of financial sector competition. The second part includes several empirical studies on the level of, and trends in, competition across countries. The third part deals with the spillovers of market power to other sectors and the economy as a whole. Finally, the fourth part considers competition in banking submarkets and subsectors.
Buy Book in Print
Show Summary Details
You do not have access to this content

Chapter 5: Competition, concentration and critical mass: why the Herfindahl–Hirschman Index is a biased competition measure

Jaap W.B. Bos, Yee Ling Chan, James W. Kolari and Jiang Yuan

Abstract

Empirical literature and related legal practice using concentration as a proxy for competition measurement are prone to a fallacy of division, as concentration measures are appropriate for perfect competition and perfect collusion but not intermediate levels of competition. Extending the classic Cournot model used to derive the Hirschman–Herfindahl Index (HHI) of market concentration, we propose an adaptation of this model intended to remove the aggregation bias and omitted variable bias that exist in many empirical studies. Application of our model and new critical mass measures to data for US commercial banks in the period 1984–2013 confirms that concentration measures are indeed unreliable competition metrics. Our results lead us to conclude that critical mass builds upon HHI as a market power metric that incorporates competitive information not contained in HHI. Policy and future research implications are briefly discussed.

You are not authenticated to view the full text of this chapter or article.

Elgaronline requires a subscription or purchase to access the full text of books or journals. Please login through your library system or with your personal username and password on the homepage.

Non-subscribers can freely search the site, view abstracts/ extracts and download selected front matter and introductory chapters for personal use.

Your library may not have purchased all subject areas. If you are authenticated and think you should have access to this title, please contact your librarian.


Further information

or login to access all content.