32As regards the econometric models used in merger control procedures, it should be recalled that the necessary prospective analysis consists of an examination of how a concentration might alter the factors determining the state of competition on the markets affected. Such an analysis makes it necessary to envisage various chains of cause and effect with a view to ascertaining which of them are the most likely (judgment of 15 February 2005, Commission v Tetra Laval, C‑12/03 P, EU:C:2005:87, paragraphs 42 and 43).
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