Answer :
The Herfindahl index equals sum of the squared percentage market shares of all firms in an industry.
What is Herfindahl index?
The Herfindahl Index can be regarded as the common measure of market concentration which is used in measuring the market in term of the competition.
In calculating this Herfindahl Index, we can determine the pre- and post-M&A and equals sum of the squared percentage market shares .
Learn more about Herfindahl index at; https://brainly.com/question/15701307
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