Is equating market share to market power a sound economic principle?

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Title: Is equating market share to market power a sound economic principle?
Authors: Whelan, Ciara
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Date: 2003
Abstract: There is a long history of mapping market structure into market power in economic analysis. This paper addresses the validity of this principle for both homogenous and differentiated products industries. While mapping market share dominance into market power may be acceptable for homogenous goods as a rule of thumb, it is by no means a robust result. In the case of differentiated products industries, there is no theoretical foundation for such a mapping. This paper highlights the need to move towards a structural approach to assessing market power in industries.
Type of material: Journal Article
Publisher: Statistical and Social Inquiry Society of Ireland
Copyright (published version): 2003, Statistical and Social Inquiry Society of Ireland
Keywords: Market shares;Homogenous and differentiated products industries;Market power
Subject LCSH: Market share
Industrial organization (Economic theory)
Commercial products
Language: en
Status of Item: Peer reviewed
Appears in Collections:Geary Institute Research Collection
Economics Research Collection

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