*This article is an automatic translation of the original article, provided here for your convenience. Read the original article. Concentration control : For a reconsideration of the structure indices "Whoever wants to kill his dog accuses him of rabies." The use of concentration index calculations in merger and acquisition transactions appears in the 1968 US guidelines. The "CR4" index (whose value is equal to the combined market share of the four largest companies in a market) was first recommended, before giving way, in 1982, to the Herfindhal-Hirschman Index (HHI), which is still mentioned in the various guidelines in force - American, European and French (Competition Authority guidelines, 2009). Advantages and limitations of the Herfindhal-Hirschman Index The use of
EDITORIAL : MERGERS CONTROL - STRUCTURAL ANALYSIS - LYNDA INDEX
Mergers control: For a reconsideration of the structural analysis
Since the ’80s, economists have focused on behavioral analysis. This approach has contributed to the development of regulations on mergers control, decreasing the importance of structural analysis in favor of the study on unilateral and coordinated effects, as shown by the latest version of the U.S. Merger Guidelines which give a limited role to structural analysis. According to the author, it is now time to reconsider structural analysis and supplement the effects analysis by using tools such as the Lynda index on oligopolistic markets.
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