Anbarci, Nejat and Katzman, Brett 2015, A new industry concentration index, Economic papers: a journal of applied economics and policy, vol. 34, no. 4, pp. 222-228, doi: 10.1111/1759-3441.12122.
We propose and analyse a new concentration index alternative to the Herfindahl-Hirschman Index (HHI). This new index emphasises the concept of competitive balance. It is designed to preserve the convexity property of the HHI when a merger involves one of the m largest firms, but to decrease and thus to indicate an increase in competition when a merger is purely among the (n − m) smallest firms.
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