The New Palgrave Dictionary of Economics

2018 Edition
| Editors: Macmillan Publishers Ltd

Concentration Ratios

  • William G. Shepherd
Reference work entry
DOI: https://doi.org/10.1057/978-1-349-95189-5_520

Abstract

These standard indicators of the degree of oligopoly in markets are used in studying market conditions. The ratio is the combined market shares of the ‘oligopoly group’ of firms which, being few, are closely interdependent. The ratio is usually based on three, four or five firms.

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Copyright information

© Macmillan Publishers Ltd. 2018

Authors and Affiliations

  • William G. Shepherd
    • 1
  1. 1.